Bangladesh is among the nations most vulnerable to earthquakes worldwide. Being a developing country, it has been a challenging issue to ensure commercial prosperity along with safety against seismic hazards. Structural engineers also face difficulties in accurately designing buildings with maximum economy and efficiency. ETABS, a leading global engineering software with BNBC 2020 guidelines plays a vital role in these cases. In this study, analysis of a B+G+6 storied building for Symmetric & Asymmetric Plan configuration has been performed using ETABS software. Both kinds of structures have experienced a range of loads for example- dead loads, live loads, partition loads, wind loads, and seismic loads, as well as load combinations that have been pursued following BNBC 2020 requirements. The objective of this work is to evaluate the seismic impact resulting from varying seismic coefficients for four seismic zones in Bangladesh, given identical symmetric and asymmetric plan arrangements. Four required metrics were evaluated between the structural performances of symmetric and asymmetric structures: storey drift, overturning moment, storey shear, and storey stiffness. The structural software provided the analytical results and parameter computations. The comparison's result demonstrates that the asymmetric structure exhibits greater storey rigidity and less storey drift over the longer axis.
Published in | American Journal of Science, Engineering and Technology (Volume 9, Issue 2) |
DOI | 10.11648/j.ajset.20240902.13 |
Page(s) | 60-95 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Symmetric & Asymmetric Plan, Commercial Building, Storey Drift, Overturning Moment, Storey Shear, Storey Stiffness, ETABS, BNBC 2020
1.1. Symmetric & Asymmetric Plan
1.2. Seismic Zones of Bangladesh
1.3. Statement of the Study
1.4. Objectives of the Study
1.5. Literature Review
2.1. Structural Model
2.2. Tables
Name | Type | Unit Weight, lb/ft^{2} | Modulus of Elasticity, lb/in^{2} | Grade |
---|---|---|---|---|
Concrete 4000psi | Concrete | 150 | 3604996.53 | f’c=4000psi |
Rebar 60,000psi | Rebar | 490 | 29000000 | f’c=60000psi |
Name | Material | Section Shape |
---|---|---|
Beam 2’x 1.5’ | Concrete 4000psi | Concrete Rectangular |
Column 2’x 2’ | Concrete 4000psi | Concrete Rectangular |
Column 2.5’x 2.5’ | Concrete 4000psi | Concrete Rectangular |
Stair Beam 1’x 1’ | Concrete 4000psi | Concrete Rectangular |
Name | Type | Element Type | Material | Thickness, in |
---|---|---|---|---|
Shear Wall Lift 8” | Wall | Shell-thin | Concrete 4000psi | 8 |
Slab 8” | Slab | Membrane | Concrete 4000psi | 8 |
Underground Slab 10” | Slab | Membrane | Concrete 4000psi | 10 |
Waist Slab 8” | Slab | Membrane | Concrete 4000psi | 8 |
Zone | Zone Coefficient | Wind Speed (m/s) |
---|---|---|
Zone-I (Rajshahi) | 0.12 | 49.2 |
Zone-II (Dhaka) | 0.20 | 65.7 |
Zone-III (Chittagong) | 0.28 | 80.0 |
Zone-IV (Kurigram) | 0.36 | 65.6 |
Load | Type | Self-weight Multiplier | Auto Load |
---|---|---|---|
Dead | Dead | 1 | Self-weight |
Live | Live | 0 | --- |
Floor Finish | Super Dead | 0 | --- |
Parapet Wall | Super Dead | 0 | --- |
Partition Load | Dead | 0 | --- |
Eq X | Seismic | 0 | IS 1893:2016 |
Eq Y | Seismic | 0 | IS 1893:2016 |
Wind Load X | Wind | 0 | Indian IS 875:2015 |
Wind Load Y | Wind | 0 | Indian IS 875:2015 |
Sl. No. | Load Combination | Sl. No. | Load Combination |
---|---|---|---|
1 | 1.4DL | 17 | 1.2DL +LL +0.3Ex - Ey |
2 | 1.2DL+1.6LL | 18 | 1.2DL +LL -0.3Ex + Ey |
3 | 1.2 DL+LL | 19 | 1.2DL +LL -0.3Ex - Ey |
4 | 1.2DL +0.8 Wx | 20 | 0.9 DL + Wx |
5 | 1.2DL +0.8 Wy | 21 | 0.9 DL + Wy |
6 | 1.2DL -0.8 Wx | 22 | 0.9 DL - Wx |
7 | 1.2DL -0.8 Wy | 23 | 0.9 DL - Wy |
8 | 1.2 DL +LL + 1.6 Wx | 24 | 0.823 DL + Ex + 0.3 Ey |
9 | 1.2 DL +LL + 1.6 Wy | 25 | 0.823 DL + Ex - 0.3 Ey |
10 | 1.2 DL +LL - 1.6 Wx | 26 | 0.823 DL - Ex + 0.3 Ey |
11 | 1.2 DL +LL - 1.6 Wy | 27 | 0.823 DL - Ex - 0.3 Ey |
12 | 1.2DL +LL + Ex + 0.3 Ey | 28 | 0.823 DL +0.3Ex + Ey |
13 | 1.2DL +LL + Ex - 0.3 Ey | 29 | 0.823 DL +0.3Ex - Ey |
14 | 1.2DL +LL - Ex + 0.3 Ey | 30 | 0.823 DL -0.3Ex + Ey |
15 | 1.2DL +LL - Ex - 0.3 Ey | 31 | 0.823 DL -0.3Ex - Ey |
16 | 1.2DL +LL +0.3Ex + Ey | * DL = DL' + FF + PW |
3.1. Seismic Zone-I (z=0.12)
3.1.1. Maximum Storey Drift Due to Seismic Load
3.1.2. Overturning Moment Due to Seismic Load
3.1.3. Storey Shear Due to Seismic Load
3.1.4. Storey Stiffness Due to Seismic Load
3.2. Seismic Zone-II (z=0.20)
3.2.1. Maximum Storey Drift Due to Seismic Load
3.2.2. Overturning Moment Due to Seismic Load
3.2.3. Storey Shear Due to Seismic Load
3.2.4. Storey Stiffness Due to Seismic Load
3.3. Seismic Zone-III (z=0.28)
3.3.1. Maximum Storey Drift Due to Seismic Load
3.3.2. Overturning Moment Due to Seismic Load
3.3.3. Storey Shear Due to Seismic Load
3.3.4. Storey Stiffness Due to Seismic Load
3.4. Seismic Zone-IV (z=0.36)
3.4.1. Maximum Storey Drift Due to Seismic Load
3.4.2. Overturning Moment Due to Seismic Load
3.4.3. Storey Shear Due to Seismic Load
3.4.4. Storey Stiffness Due to Seismic Load
3.5. Comparison Between ETABS & Manual Calculation
3.5.1. For Symmetric Plan
Horizontal Force Act on Floor Due to Seismic Action-Symmetrical | |||||
---|---|---|---|---|---|
Story | Elevation (ft) | X-Dir-ETABS (kip) | Y-Dir-ETABS (kip) | X-Dir-EXCEL (kip) | Y-Dir-EXCEL (kip) |
Upper Roof | 91 | 32.71 | 33.70 | 57.92 | 56.99 |
Roof | 81 | 926.49 | 954.43 | 784.49 | 617.53 |
Story6 | 71 | 767.44 | 790.58 | 635.91 | 482.69 |
Story5 | 61 | 570.91 | 588.13 | 463.34 | 379.93 |
Story4 | 51 | 401.99 | 414.11 | 318.80 | 250.95 |
Story3 | 41 | 259.95 | 267.79 | 201.92 | 149.01 |
Story2 | 31 | 148.72 | 153.21 | 112.29 | 73.66 |
Story1 | 21 | 68.27 | 70.33 | 49.35 | 24.28 |
GF | 11 | 19.35 | 19.94 | 12.35 | 6.08 |
Underground | 1 | 0.59 | 0.61 | 0.47 | 0.19 |
3.5.2. For Asymmetric Plan
Horizontal Force Act on Floor Due to Seismic Action-Asymmetrical | |||||
---|---|---|---|---|---|
Story | Elevation (ft) | X-Dir-ETABS (kip) | Y-Dir-ETABS (kip) | X-Dir-EXCEL (kip) | Y-Dir-EXCEL (kip) |
Upper Roof | 91 | 71.95 | 57.87 | 32.18 | 31.66 |
Roof | 81 | 534.47 | 429.85 | 435.83 | 343.07 |
Story6 | 71 | 462.25 | 371.76 | 353.28 | 268.16 |
Story5 | 61 | 341.34 | 274.52 | 257.41 | 211.07 |
Story4 | 51 | 238.60 | 191.89 | 177.11 | 139.42 |
Story3 | 41 | 154.20 | 124.02 | 112.18 | 82.79 |
Story2 | 31 | 88.18 | 70.92 | 62.38 | 40.92 |
Story1 | 21 | 40.48 | 32.56 | 27.41 | 13.49 |
GF | 11 | 11.31 | 9.10 | 6.86 | 3.38 |
Underground | 1 | 0.32 | 0.26 | 0.26 | 0.10 |
Story Data- Symmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Symmetrical | Drift X- Symmetrical | Stiff X- Symmetrical | Shear Y- Symmetrical | Drift Y- Symmetrical | Stiff Y- Symmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 10.903 | 0.00036 | 283.7037 | 0 | - | 0 |
Roof | Eq X | 319.733 | 0.000357 | 7241.6954 | 0 | - | 0 |
6th Floor | Eq X | 575.545 | 0.000543 | 9402.8999 | 0 | - | 0 |
5th Floor | Eq X | 765.849 | 0.000678 | 10545.9857 | 0 | - | 0 |
4th Floor | Eq X | 899.845 | 0.000782 | 11017.7181 | 0 | - | 0 |
3rd Floor | Eq X | 986.494 | 0.000838 | 11365.5951 | 0 | - | 0 |
2nd Floor | Eq X | 1036.067 | 0.00084 | 11956.0186 | 0 | - | 0 |
1st Floor | Eq X | 1058.822 | 0.00072 | 14675.5982 | 0 | - | 0 |
GF | Eq X | 1065.273 | 0.000371 | 26113.5454 | 0 | - | 0 |
Underground | Eq X | 1065.47 | 0.000031 | 3118623.621 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 11.232 | 0.000414 | 257.0164 |
Roof | Eq Y | 0 | - | 0 | 329.375 | 0.000423 | 6959.2916 |
6th Floor | Eq Y | 0 | - | 0 | 592.902 | 0.00061 | 9280.1365 |
5th Floor | Eq Y | 0 | - | 0 | 788.945 | 0.000757 | 10359.3911 |
4th Floor | Eq Y | 0 | - | 0 | 926.982 | 0.000863 | 10955.4339 |
3rd Floor | Eq Y | 0 | - | 0 | 1016.244 | 0.000916 | 11555.3489 |
2nd Floor | Eq Y | 0 | - | 0 | 1067.312 | 0.000898 | 12712.0519 |
1st Floor | Eq Y | 0 | - | 0 | 1090.754 | 0.000789 | 16668.4111 |
GF | Eq Y | 0 | - | 0 | 1097.4 | 0.000496 | 28514.5306 |
Underground | Eq Y | 0 | - | 0 | 1097.602 | 0.00004 | 3343496.276 |
Story Data-Asymmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Asymmetrical | Drift X- Asymmetrical | Stiff X- Asymmetrical | Shear Y- Asymmetrical | Drift Y- Asymmetrical | Stiff Y- Asymmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 42.766 | 0.000322 | 1043.3535 | 0 | - | 0 |
Roof | Eq X | 360.728 | 0.000317 | 8362.0607 | 0 | - | 0 |
Story6 | Eq X | 635.734 | 0.000461 | 10974.5249 | 0 | - | 0 |
Story5 | Eq X | 838.806 | 0.000586 | 12105.8438 | 0 | - | 0 |
Story4 | Eq X | 980.754 | 0.000675 | 12771.3469 | 0 | - | 0 |
Story3 | Eq X | 1072.485 | 0.000726 | 13388.8204 | 0 | - | 0 |
Story2 | Eq X | 1124.943 | 0.000733 | 14565.8617 | 0 | - | 0 |
Story1 | Eq X | 1149.025 | 0.000658 | 19336.835 | 0 | - | 0 |
GF | Eq X | 1155.75 | 0.000318 | 33465.9957 | 0 | - | 0 |
Underground | Eq X | 1155.941 | 0.00004 | 2665366.323 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 34.623 | 0.000256 | 1162.4255 |
Roof | Eq Y | 0 | - | 0 | 292.038 | 0.000415 | 7635.9501 |
Story6 | Eq Y | 0 | - | 0 | 514.678 | 0.000676 | 9151.027 |
Story5 | Eq Y | 0 | - | 0 | 679.081 | 0.000898 | 9477.5899 |
Story4 | Eq Y | 0 | - | 0 | 793.999 | 0.001058 | 9620.2314 |
Story3 | Eq Y | 0 | - | 0 | 868.263 | 0.001155 | 9824.6743 |
Story2 | Eq Y | 0 | - | 0 | 910.732 | 0.001174 | 10439.8795 |
Story1 | Eq Y | 0 | - | 0 | 930.228 | 0.001012 | 13274.3293 |
GF | Eq Y | 0 | - | 0 | 935.672 | 0.000451 | 26305.6606 |
Underground | Eq Y | 0 | - | 0 | 935.828 | 0.00005 | 2175045.588 |
Story Data - Symmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Symmetrical | Drift X- Symmetrical | Stiff X- Symmetrical | Shear Y- Symmetrical | Drift Y- Symmetrical | Stiff Y- Symmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 18.171 | 0.000601 | 283.7037 | 0 | - | 0 |
Roof | Eq X | 532.888 | 0.000596 | 7241.6954 | 0 | - | 0 |
6th Floor | Eq X | 959.241 | 0.000908 | 9402.8999 | 0 | - | 0 |
5th Floor | Eq X | 1276.415 | 0.001131 | 10545.9857 | 0 | - | 0 |
4th Floor | Eq X | 1499.742 | 0.001304 | 11017.7181 | 0 | - | 0 |
3rd Floor | Eq X | 1644.156 | 0.001398 | 11365.5951 | 0 | - | 0 |
2nd Floor | Eq X | 1726.778 | 0.001401 | 11956.0186 | 0 | - | 0 |
1st Floor | Eq X | 1764.704 | 0.001199 | 14675.5982 | 0 | - | 0 |
GF | Eq X | 1775.455 | 0.000616 | 26113.5454 | 0 | - | 0 |
Underground | Eq X | 1775.783 | 0.000052 | 3118623.621 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 18.719 | 0.000699 | 257.0164 |
Roof | Eq Y | 0 | - | 0 | 548.959 | 0.000711 | 6959.2916 |
6th Floor | Eq Y | 0 | - | 0 | 988.169 | 0.001024 | 9280.1365 |
5th Floor | Eq Y | 0 | - | 0 | 1314.909 | 0.001268 | 10359.3911 |
4th Floor | Eq Y | 0 | - | 0 | 1544.971 | 0.001445 | 10955.4339 |
3rd Floor | Eq Y | 0 | - | 0 | 1693.74 | 0.001532 | 11555.3489 |
2nd Floor | Eq Y | 0 | - | 0 | 1778.854 | 0.001502 | 12712.0519 |
1st Floor | Eq Y | 0 | - | 0 | 1817.924 | 0.001318 | 16668.4111 |
GF | Eq Y | 0 | - | 0 | 1828.999 | 0.000826 | 28514.5306 |
Underground | Eq Y | 0 | - | 0 | 1829.336 | 0.000067 | 3343496.276 |
Story Data -Asymmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Asymmetrical | Drift X- Asymmetrical | Stiff X- Asymmetrical | Shear Y- Asymmetrical | Drift Y- Asymmetrical | Stiff Y- Asymmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 71.277 | 0.00058 | 1043.3535 | 0 | - | 0 |
Roof | Eq X | 601.213 | 0.000541 | 8362.0607 | 0 | - | 0 |
Story6 | Eq X | 1059.557 | 0.000787 | 10974.5249 | 0 | - | 0 |
Story5 | Eq X | 1398.009 | 0.000994 | 12105.8438 | 0 | - | 0 |
Story4 | Eq X | 1634.59 | 0.00114 | 12771.3469 | 0 | - | 0 |
Story3 | Eq X | 1787.476 | 0.001223 | 13388.8204 | 0 | - | 0 |
Story2 | Eq X | 1874.905 | 0.001233 | 14565.8617 | 0 | - | 0 |
Story1 | Eq X | 1915.041 | 0.001103 | 19336.835 | 0 | - | 0 |
GF | Eq X | 1926.249 | 0.000531 | 33465.9957 | 0 | - | 0 |
Underground | Eq X | 1926.569 | 0.000066 | 2665366.323 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 57.705 | 0.000441 | 1162.4255 |
Roof | Eq Y | 0 | - | 0 | 486.73 | 0.00069 | 7635.9501 |
Story6 | Eq Y | 0 | - | 0 | 857.796 | 0.001124 | 9151.027 |
Story5 | Eq Y | 0 | - | 0 | 1131.801 | 0.001495 | 9477.5899 |
Story4 | Eq Y | 0 | - | 0 | 1323.332 | 0.001762 | 9620.2314 |
Story3 | Eq Y | 0 | - | 0 | 1447.105 | 0.001923 | 9824.6743 |
Story2 | Eq Y | 0 | - | 0 | 1517.887 | 0.001956 | 10439.8795 |
Story1 | Eq Y | 0 | - | 0 | 1550.38 | 0.001687 | 13274.3293 |
GF | Eq Y | 0 | - | 0 | 1559.454 | 0.000751 | 26305.6606 |
Underground | Eq Y | 0 | - | 0 | 1559.713 | 0.000084 | 2175045.588 |
Story Data - Symmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Symmetrical | Drift X- Symmetrical | Stiff X- Symmetrical | Shear Y- Symmetrical | Drift Y- Symmetrical | Stiff Y- Symmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 25.44 | 0.000842 | 283.7037 | 0 | - | 0 |
Roof | Eq X | 746.044 | 0.000835 | 7241.6954 | 0 | - | 0 |
6th Floor | Eq X | 1342.937 | 0.001272 | 9402.8999 | 0 | - | 0 |
5th Floor | Eq X | 1786.981 | 0.001585 | 10545.9857 | 0 | - | 0 |
4th Floor | Eq X | 2099.638 | 0.001827 | 11017.7181 | 0 | - | 0 |
3rd Floor | Eq X | 2301.819 | 0.001958 | 11365.5951 | 0 | - | 0 |
2nd Floor | Eq X | 2417.49 | 0.001962 | 11956.0186 | 0 | - | 0 |
1st Floor | Eq X | 2470.586 | 0.001678 | 14675.5982 | 0 | - | 0 |
GF | Eq X | 2485.638 | 0.000864 | 26113.5454 | 0 | - | 0 |
Underground | Eq X | 2486.096 | 0.000072 | 3118623.621 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 26.207 | 0.001018 | 257.0164 |
Roof | Eq Y | 0 | - | 0 | 768.542 | 0.001 | 6959.2916 |
6th Floor | Eq Y | 0 | - | 0 | 1383.437 | 0.001438 | 9280.1365 |
5th Floor | Eq Y | 0 | - | 0 | 1840.873 | 0.00178 | 10359.3911 |
4th Floor | Eq Y | 0 | - | 0 | 2162.959 | 0.002027 | 10955.4339 |
3rd Floor | Eq Y | 0 | - | 0 | 2371.236 | 0.002148 | 11555.3489 |
2nd Floor | Eq Y | 0 | - | 0 | 2490.396 | 0.002107 | 12712.0519 |
1st Floor | Eq Y | 0 | - | 0 | 2545.093 | 0.001847 | 16668.4111 |
GF | Eq Y | 0 | - | 0 | 2560.599 | 0.001155 | 28514.5306 |
Underground | Eq Y | 0 | - | 0 | 2561.071 | 0.000094 | 3343496.276 |
Story Data -Asymmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Asymmetrical | Drift X- Asymmetrical | Stiff X- Asymmetrical | Shear Y- Asymmetrical | Drift Y- Asymmetrical | Stiff Y- Asymmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 99.788 | 0.000838 | 1043.3535 | 0 | - | 0 |
Roof | Eq X | 841.698 | 0.000765 | 8362.0607 | 0 | - | 0 |
Story6 | Eq X | 1483.379 | 0.001112 | 10974.5249 | 0 | - | 0 |
Story5 | Eq X | 1957.213 | 0.001402 | 12105.8438 | 0 | - | 0 |
Story4 | Eq X | 2288.425 | 0.001605 | 12771.3469 | 0 | - | 0 |
Story3 | Eq X | 2502.466 | 0.00172 | 13388.8204 | 0 | - | 0 |
Story2 | Eq X | 2624.868 | 0.001732 | 14565.8617 | 0 | - | 0 |
Story1 | Eq X | 2681.058 | 0.001548 | 19336.835 | 0 | - | 0 |
GF | Eq X | 2696.749 | 0.000745 | 33465.9957 | 0 | - | 0 |
Underground | Eq X | 2697.196 | 0.000092 | 2665366.323 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 80.787 | 0.000626 | 1162.4255 |
Roof | Eq Y | 0 | - | 0 | 681.422 | 0.000964 | 7635.9501 |
Story6 | Eq Y | 0 | - | 0 | 1200.915 | 0.001572 | 9151.027 |
Story5 | Eq Y | 0 | - | 0 | 1584.522 | 0.002092 | 9477.5899 |
Story4 | Eq Y | 0 | - | 0 | 1852.665 | 0.002465 | 9620.2314 |
Story3 | Eq Y | 0 | - | 0 | 2025.948 | 0.002692 | 9824.6743 |
Story2 | Eq Y | 0 | - | 0 | 2125.042 | 0.002738 | 10439.8795 |
Story1 | Eq Y | 0 | - | 0 | 2170.532 | 0.002362 | 13274.3293 |
GF | Eq Y | 0 | - | 0 | 2183.236 | 0.001052 | 26305.6606 |
Underground | Eq Y | 0 | - | 0 | 2183.598 | 0.000117 | 2175045.588 |
Story Data - Symmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Symmetrical | Drift X- Symmetrical | Stiff X- Symmetrical | Shear Y- Symmetrical | Drift Y- Symmetrical | Stiff Y- Symmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 32.708 | 0.001084 | 283.7037 | 0 | - | 0 |
Roof | Eq X | 959.199 | 0.001074 | 7241.6954 | 0 | - | 0 |
6th Floor | Eq X | 1726.634 | 0.001636 | 9402.8999 | 0 | - | 0 |
5th Floor | Eq X | 2297.548 | 0.002039 | 10545.9857 | 0 | - | 0 |
4th Floor | Eq X | 2699.535 | 0.002349 | 11017.7181 | 0 | - | 0 |
3rd Floor | Eq X | 2959.481 | 0.002518 | 11365.5951 | 0 | - | 0 |
2nd Floor | Eq X | 3108.201 | 0.002523 | 11956.0186 | 0 | - | 0 |
1st Floor | Eq X | 3176.467 | 0.002157 | 14675.5982 | 0 | - | 0 |
GF | Eq X | 3195.82 | 0.001112 | 26113.5454 | 0 | - | 0 |
Underground | Eq X | 3196.409 | 0.000093 | 3118623.621 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 33.695 | 0.00127 | 257.0164 |
Roof | Eq Y | 0 | - | 0 | 988.126 | 0.001288 | 6959.2916 |
6th Floor | Eq Y | 0 | - | 0 | 1778.705 | 0.001852 | 9280.1365 |
5th Floor | Eq Y | 0 | - | 0 | 2366.836 | 0.002291 | 10359.3911 |
4th Floor | Eq Y | 0 | - | 0 | 2780.947 | 0.002609 | 10955.4339 |
3rd Floor | Eq Y | 0 | - | 0 | 3048.732 | 0.002765 | 11555.3489 |
2nd Floor | Eq Y | 0 | - | 0 | 3201.937 | 0.002711 | 12712.0519 |
1st Floor | Eq Y | 0 | - | 0 | 3272.262 | 0.002376 | 16668.4111 |
GF | Eq Y | 0 | - | 0 | 3292.199 | 0.001485 | 28514.5306 |
Underground | Eq Y | 0 | - | 0 | 3292.805 | 0.000121 | 3343496.276 |
Story Data -Asymmetrical Structure | |||||||
---|---|---|---|---|---|---|---|
Story | Case | Shear X- Asymmetrical | Drift X- Asymmetrical | Stiff X- Asymmetrical | Shear Y- Asymmetrical | Drift Y- Asymmetrical | Stiff Y- Asymmetrical |
(kip) | (kip/in) | (kip) | (kip/in) | ||||
Upper Roof | Eq X | 128.299 | 0.001096 | 1043.3535 | 0 | - | 0 |
Roof | Eq X | 1082.183 | 0.000988 | 8362.0607 | 0 | - | 0 |
Story6 | Eq X | 1907.202 | 0.001438 | 10974.5249 | 0 | - | 0 |
Story5 | Eq X | 2516.417 | 0.00181 | 12105.8438 | 0 | - | 0 |
Story4 | Eq X | 2942.261 | 0.002071 | 12771.3469 | 0 | - | 0 |
Story3 | Eq X | 3217.456 | 0.002217 | 13388.8204 | 0 | - | 0 |
Story2 | Eq X | 3374.83 | 0.002231 | 14565.8617 | 0 | - | 0 |
Story1 | Eq X | 3447.074 | 0.001993 | 19336.835 | 0 | - | 0 |
GF | Eq X | 3467.249 | 0.000959 | 33465.9957 | 0 | - | 0 |
Underground | Eq X | 3467.824 | 0.000119 | 2665366.323 | 0 | - | 0 |
Upper Roof | Eq Y | 0 | - | 0 | 103.869 | 0.000811 | 1162.4255 |
Roof | Eq Y | 0 | - | 0 | 876.114 | 0.001238 | 7635.9501 |
Story6 | Eq Y | 0 | - | 0 | 1544.034 | 0.002021 | 9151.027 |
Story5 | Eq Y | 0 | - | 0 | 2037.242 | 0.002689 | 9477.5899 |
Story4 | Eq Y | 0 | - | 0 | 2381.997 | 0.003169 | 9620.2314 |
Story3 | Eq Y | 0 | - | 0 | 2604.79 | 0.00346 | 9824.6743 |
Story2 | Eq Y | 0 | - | 0 | 2732.197 | 0.00352 | 10439.8795 |
Story1 | Eq Y | 0 | - | 0 | 2790.684 | 0.003036 | 13274.3293 |
GF | Eq Y | 0 | - | 0 | 2807.017 | 0.001352 | 26305.6606 |
Underground | Eq Y | 0 | - | 0 | 2807.483 | 0.000151 | 2175045.588 |
Level | Elevation | Symmetric Structure; z=0.12 | Asymmetric Structure; z=0.12 | ||||||
---|---|---|---|---|---|---|---|---|---|
Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | ||
Underground | 1 | -1065.47 | 1065.47 | -1097.602 | 1097.602 | -1155.941 | 1155.941 | -935.828 | 935.828 |
GF | 11 | -1065.273 | 11718.003 | -1097.4 | 12071.4 | -1155.75 | 12713.25 | -935.672 | 10292.392 |
Story 1 | 21 | -1058.822 | 22235.262 | -1090.754 | 22905.834 | -1149.025 | 24129.525 | -930.228 | 19534.788 |
Story 2 | 31 | -1036.067 | 32118.077 | -1067.312 | 33086.672 | -1124.943 | 34873.233 | -910.732 | 28232.692 |
Story 3 | 41 | -986.494 | 40446.254 | -1016.244 | 41666.004 | -1072.485 | 43971.885 | -868.263 | 35598.783 |
Story 4 | 51 | -899.845 | 45892.095 | -926.982 | 47276.082 | -980.754 | 50018.454 | -793.999 | 40493.949 |
Story 5 | 61 | -765.849 | 46716.789 | -788.945 | 48125.645 | -838.806 | 51167.166 | -679.081 | 41423.941 |
Story 6 | 71 | -575.545 | 40863.695 | -592.902 | 42096.042 | -635.734 | 45137.114 | -514.678 | 36542.138 |
Roof | 81 | -319.733 | 25898.373 | -329.375 | 26679.375 | -360.728 | 29218.968 | -292.038 | 23655.078 |
Upper Roof | 91 | -10.903 | 992.173 | -11.232 | 1022.112 | -42.766 | 3891.706 | -34.623 | 3150.693 |
Level | Elevation | Symmetric Structure; z=0.20 | Asymmetric Structure; z=0.20 | ||||||
---|---|---|---|---|---|---|---|---|---|
Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | ||
Underground | 1 | -1775.783 | 1775.783 | -1829.336 | 1829.336 | -1926.569 | 1926.569 | -1559.713 | 1559.713 |
GF | 11 | -1775.455 | 19530.005 | -1828.999 | 20118.989 | -1926.249 | 21188.739 | -1559.454 | 17153.994 |
Story 1 | 21 | -1764.704 | 37058.784 | -1817.924 | 38176.404 | -1915.041 | 40215.861 | -1550.38 | 32557.98 |
Story 2 | 31 | -1726.778 | 53530.118 | -1778.854 | 55144.474 | -1874.905 | 58122.055 | -1517.887 | 47054.497 |
Story 3 | 41 | -1644.156 | 67410.396 | -1693.74 | 69443.34 | -1787.476 | 73286.516 | -1447.105 | 59331.305 |
Story 4 | 51 | -1499.742 | 76486.842 | -1544.971 | 78793.521 | -1634.59 | 83364.09 | -1323.332 | 67489.932 |
Story 5 | 61 | -1276.415 | 77861.315 | -1314.909 | 80209.449 | -1398.009 | 85278.549 | -1131.801 | 69039.861 |
Story 6 | 71 | -959.241 | 68106.111 | -988.169 | 70159.999 | -1059.557 | 75228.547 | -857.796 | 60903.516 |
Roof | 81 | -532.888 | 43163.928 | -548.959 | 44465.679 | -601.213 | 48698.253 | -486.73 | 39425.13 |
Upper Roof | 91 | -18.171 | 1653.561 | -18.719 | 1703.429 | -71.277 | 6486.207 | -57.705 | 5251.155 |
Level | Elevation | Symmetric Structure; z=0.28 | Asymmetric Structure; z=0.28 | ||||||
---|---|---|---|---|---|---|---|---|---|
Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | ||
Underground | 1 | -2486.096 | 2486.096 | -2561.071 | 2561.071 | -2697.196 | 2697.196 | -2183.598 | 2183.598 |
GF | 11 | -2485.638 | 27342.018 | -2560.599 | 28166.589 | -2696.749 | 29664.239 | -2183.236 | 24015.596 |
Story 1 | 21 | -2470.586 | 51882.306 | -2545.093 | 53446.953 | -2681.058 | 56302.218 | -2170.532 | 45581.172 |
Story 2 | 31 | -2417.49 | 74942.19 | -2490.396 | 77202.276 | -2624.868 | 81370.908 | -2125.042 | 65876.302 |
Story 3 | 41 | -2301.819 | 94374.579 | -2371.236 | 97220.676 | -2502.466 | 102601.10 | -2025.948 | 83063.868 |
Story 4 | 51 | -2099.638 | 107081.53 | -2162.959 | 110310.90 | -2288.425 | 116709.67 | -1852.665 | 94485.915 |
Story 5 | 61 | -1786.981 | 109005.84 | -1840.873 | 112293.25 | -1957.213 | 119389.99 | -1584.522 | 96655.842 |
Story 6 | 71 | -1342.937 | 95348.527 | -1383.437 | 98224.027 | -1483.379 | 105319.90 | -1200.915 | 85264.965 |
Roof | 81 | -746.044 | 60429.564 | -768.542 | 62251.902 | -841.698 | 68177.538 | -681.422 | 55195.182 |
Upper Roof | 91 | -25.44 | 2315.04 | -26.207 | 2384.837 | -99.788 | 9080.708 | -80.787 | 7351.617 |
Level | Elevation | Symmetric Structure; z=0.36 | Asymmetric Structure; z=0.36 | ||||||
---|---|---|---|---|---|---|---|---|---|
Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | Story Force/Shear (Vx) | Overturning Moment-X direction | Story Force/Shear (Vy) | Overturning Moment-Y direction | ||
Underground | 1 | -3196.409 | 3196.409 | -3292.805 | 3292.805 | -3467.824 | 3467.824 | -2807.483 | 2807.483 |
GF | 11 | -3195.82 | 35154.02 | -3292.199 | 36214.189 | -3467.249 | 38139.739 | -2807.017 | 30877.187 |
Story 1 | 21 | -3176.467 | 66705.807 | -3272.262 | 68717.502 | -3447.074 | 72388.554 | -2790.684 | 58604.364 |
Story 2 | 31 | -3108.201 | 96354.231 | -3201.937 | 99260.047 | -3374.83 | 104619.73 | -2732.197 | 84698.107 |
Story 3 | 41 | -2959.481 | 121338.72 | -3048.732 | 124998.01 | -3217.456 | 131915.69 | -2604.79 | 106796.39 |
Story 4 | 51 | -2699.535 | 137676.28 | -2780.947 | 141828.29 | -2942.261 | 150055.31 | -2381.997 | 121481.84 |
Story 5 | 61 | -2297.548 | 140150.42 | -2366.836 | 144376.99 | -2516.417 | 153501.43 | -2037.242 | 124271.76 |
Story 6 | 71 | -1726.634 | 122591.01 | -1778.705 | 126288.05 | -1907.202 | 135411.34 | -1544.034 | 109626.41 |
Roof | 81 | -959.199 | 77695.119 | -988.126 | 80038.206 | -1082.183 | 87656.823 | -876.114 | 70965.234 |
Upper Roof | 91 | -32.708 | 2976.428 | -33.695 | 3066.245 | -128.299 | 11675.209 | -103.869 | 9452.079 |
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APA Style
Rana, M. S., Kabir, S. F. B., Sami, S. T., Shahriar, M. M. (2024). Performance Assessment of Commercial Building for Symmetric and Asymmetric Plan Configurations in Different Seismic Zones of Bangladesh Using ETABS. American Journal of Science, Engineering and Technology, 9(2), 60-95. https://doi.org/10.11648/j.ajset.20240902.13
ACS Style
Rana, M. S.; Kabir, S. F. B.; Sami, S. T.; Shahriar, M. M. Performance Assessment of Commercial Building for Symmetric and Asymmetric Plan Configurations in Different Seismic Zones of Bangladesh Using ETABS. Am. J. Sci. Eng. Technol. 2024, 9(2), 60-95. doi: 10.11648/j.ajset.20240902.13
AMA Style
Rana MS, Kabir SFB, Sami ST, Shahriar MM. Performance Assessment of Commercial Building for Symmetric and Asymmetric Plan Configurations in Different Seismic Zones of Bangladesh Using ETABS. Am J Sci Eng Technol. 2024;9(2):60-95. doi: 10.11648/j.ajset.20240902.13
@article{10.11648/j.ajset.20240902.13, author = {Md. Sohel Rana and Syed Fardin Bin Kabir and Samiha Tabassum Sami and Md. Mahin Shahriar}, title = {Performance Assessment of Commercial Building for Symmetric and Asymmetric Plan Configurations in Different Seismic Zones of Bangladesh Using ETABS }, journal = {American Journal of Science, Engineering and Technology}, volume = {9}, number = {2}, pages = {60-95}, doi = {10.11648/j.ajset.20240902.13}, url = {https://doi.org/10.11648/j.ajset.20240902.13}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajset.20240902.13}, abstract = {Bangladesh is among the nations most vulnerable to earthquakes worldwide. Being a developing country, it has been a challenging issue to ensure commercial prosperity along with safety against seismic hazards. Structural engineers also face difficulties in accurately designing buildings with maximum economy and efficiency. ETABS, a leading global engineering software with BNBC 2020 guidelines plays a vital role in these cases. In this study, analysis of a B+G+6 storied building for Symmetric & Asymmetric Plan configuration has been performed using ETABS software. Both kinds of structures have experienced a range of loads for example- dead loads, live loads, partition loads, wind loads, and seismic loads, as well as load combinations that have been pursued following BNBC 2020 requirements. The objective of this work is to evaluate the seismic impact resulting from varying seismic coefficients for four seismic zones in Bangladesh, given identical symmetric and asymmetric plan arrangements. Four required metrics were evaluated between the structural performances of symmetric and asymmetric structures: storey drift, overturning moment, storey shear, and storey stiffness. The structural software provided the analytical results and parameter computations. The comparison's result demonstrates that the asymmetric structure exhibits greater storey rigidity and less storey drift over the longer axis. }, year = {2024} }
TY - JOUR T1 - Performance Assessment of Commercial Building for Symmetric and Asymmetric Plan Configurations in Different Seismic Zones of Bangladesh Using ETABS AU - Md. Sohel Rana AU - Syed Fardin Bin Kabir AU - Samiha Tabassum Sami AU - Md. Mahin Shahriar Y1 - 2024/04/28 PY - 2024 N1 - https://doi.org/10.11648/j.ajset.20240902.13 DO - 10.11648/j.ajset.20240902.13 T2 - American Journal of Science, Engineering and Technology JF - American Journal of Science, Engineering and Technology JO - American Journal of Science, Engineering and Technology SP - 60 EP - 95 PB - Science Publishing Group SN - 2578-8353 UR - https://doi.org/10.11648/j.ajset.20240902.13 AB - Bangladesh is among the nations most vulnerable to earthquakes worldwide. Being a developing country, it has been a challenging issue to ensure commercial prosperity along with safety against seismic hazards. Structural engineers also face difficulties in accurately designing buildings with maximum economy and efficiency. ETABS, a leading global engineering software with BNBC 2020 guidelines plays a vital role in these cases. In this study, analysis of a B+G+6 storied building for Symmetric & Asymmetric Plan configuration has been performed using ETABS software. Both kinds of structures have experienced a range of loads for example- dead loads, live loads, partition loads, wind loads, and seismic loads, as well as load combinations that have been pursued following BNBC 2020 requirements. The objective of this work is to evaluate the seismic impact resulting from varying seismic coefficients for four seismic zones in Bangladesh, given identical symmetric and asymmetric plan arrangements. Four required metrics were evaluated between the structural performances of symmetric and asymmetric structures: storey drift, overturning moment, storey shear, and storey stiffness. The structural software provided the analytical results and parameter computations. The comparison's result demonstrates that the asymmetric structure exhibits greater storey rigidity and less storey drift over the longer axis. VL - 9 IS - 2 ER -