A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Response of asymmetric reinforced concrete buildings under directional seismic loads
https://orcid.org/http://orcid.org/0000-0001-9804-6434
https://orcid.org/http://orcid.org/0000-0002-1411-9374
Asymmetric buildings are becoming common due to architectural appearance or urbanization. Asymmetry in the buildings may become possible in both plan and vertical directions. A dynamic time history analysis is performed on the plan and vertical asymmetric buildings. The eccentricity in the plan (distance between the stiffness center and the mass center) is introduced by relocating the core from the mass center at 6.0 m, 12.0 m, and 18.0 m in the longitudinal direction. Vertical asymmetry is introduced by keeping additional mass or creating a soft storey in the ground, middle and top floors. The present study considers the ground acceleration time series of the El-Centro 1940 and Koyna 1967 earthquakes. The earthquake incident angles of 0°, 30° and 45° are studied. A MATLAB code is developed using Newmark’s beta method to obtain the response time history. Super Element (SE) technique is used to model the stiffness of each floor. The displacements in the longitudinal, and lateral directions and rotation about the vertical axis are evaluated on each floor. The investigation found that the peak lateral response in the plan asymmetric building increases with the increase in eccentricity and earthquake incidence angle increase. The response comparison of the plan and vertical asymmetric structures showed that the plan asymmetric buildings are more sensitive than the vertical asymmetric buildings. The stiffness vertical asymmetry showed a larger response than the mass asymmetric structure. It is concluded that asymmetry shall be considered in the seismic design of RC structures.
Response of asymmetric reinforced concrete buildings under directional seismic loads
https://orcid.org/http://orcid.org/0000-0001-9804-6434
https://orcid.org/http://orcid.org/0000-0002-1411-9374
Asymmetric buildings are becoming common due to architectural appearance or urbanization. Asymmetry in the buildings may become possible in both plan and vertical directions. A dynamic time history analysis is performed on the plan and vertical asymmetric buildings. The eccentricity in the plan (distance between the stiffness center and the mass center) is introduced by relocating the core from the mass center at 6.0 m, 12.0 m, and 18.0 m in the longitudinal direction. Vertical asymmetry is introduced by keeping additional mass or creating a soft storey in the ground, middle and top floors. The present study considers the ground acceleration time series of the El-Centro 1940 and Koyna 1967 earthquakes. The earthquake incident angles of 0°, 30° and 45° are studied. A MATLAB code is developed using Newmark’s beta method to obtain the response time history. Super Element (SE) technique is used to model the stiffness of each floor. The displacements in the longitudinal, and lateral directions and rotation about the vertical axis are evaluated on each floor. The investigation found that the peak lateral response in the plan asymmetric building increases with the increase in eccentricity and earthquake incidence angle increase. The response comparison of the plan and vertical asymmetric structures showed that the plan asymmetric buildings are more sensitive than the vertical asymmetric buildings. The stiffness vertical asymmetry showed a larger response than the mass asymmetric structure. It is concluded that asymmetry shall be considered in the seismic design of RC structures.
Response of asymmetric reinforced concrete buildings under directional seismic loads
https://orcid.org/http://orcid.org/0000-0001-9804-6434
https://orcid.org/http://orcid.org/0000-0002-1411-9374
Asymmetric buildings are becoming common due to architectural appearance or urbanization. Asymmetry in the buildings may become possible in both plan and vertical directions. A dynamic time history analysis is performed on the plan and vertical asymmetric buildings. The eccentricity in the plan (distance between the stiffness center and the mass center) is introduced by relocating the core from the mass center at 6.0 m, 12.0 m, and 18.0 m in the longitudinal direction. Vertical asymmetry is introduced by keeping additional mass or creating a soft storey in the ground, middle and top floors. The present study considers the ground acceleration time series of the El-Centro 1940 and Koyna 1967 earthquakes. The earthquake incident angles of 0°, 30° and 45° are studied. A MATLAB code is developed using Newmark’s beta method to obtain the response time history. Super Element (SE) technique is used to model the stiffness of each floor. The displacements in the longitudinal, and lateral directions and rotation about the vertical axis are evaluated on each floor. The investigation found that the peak lateral response in the plan asymmetric building increases with the increase in eccentricity and earthquake incidence angle increase. The response comparison of the plan and vertical asymmetric structures showed that the plan asymmetric buildings are more sensitive than the vertical asymmetric buildings. The stiffness vertical asymmetry showed a larger response than the mass asymmetric structure. It is concluded that asymmetry shall be considered in the seismic design of RC structures.
Response of asymmetric reinforced concrete buildings under directional seismic loads
Asian J Civ Eng
Madhuri, Seeram (author) / Kumar, Pramod (author)
Asian Journal of Civil Engineering ; 25 ; 1625-1640
2024-02-01
16 pages
Article (Journal)
Electronic Resource
English
Response of asymmetric reinforced concrete buildings under directional seismic loads
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