A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic performance evaluation of tall, multitower reinforced concrete buildings with large bottom podiums
This paper presents a comprehensive investigation of the seismic performance of tall reinforced concrete (RC) buildings with a large podium at the bottom. The investigation includes two shaking table tests and numerical simulations. The first model (A model) is a multitower building, which consists of four super towers and a large podium. The second model (B model), with a single tower, is a part of the A model. The two models are confronted with the problem of exceeding the code limits for the floor stiffness ratio. This research conducts a seismic performance evaluation and response comparison of the two models. Based on the results of the experiment and simulation, these types of buildings can achieve favorable seismic performance by adopting concrete beams and columns with inner shape steel to strengthen the transfer floor, notwithstanding when the story lateral stiffness ratio at the transfer floor is outside of code limits. It is predicted that the prototype buildings will suffer slight damage under moderate earthquakes but will not collapse when subjected to major earthquakes. In addition, a seismic response comparison was conducted between the two models. The responses show similarities for some aspects, such as mode shapes and frequency reduction. Considering safety, it is suggested to establish and analyze both single and multitower models and to adopt the envelope value for the seismic design of these types of buildings.
Seismic performance evaluation of tall, multitower reinforced concrete buildings with large bottom podiums
This paper presents a comprehensive investigation of the seismic performance of tall reinforced concrete (RC) buildings with a large podium at the bottom. The investigation includes two shaking table tests and numerical simulations. The first model (A model) is a multitower building, which consists of four super towers and a large podium. The second model (B model), with a single tower, is a part of the A model. The two models are confronted with the problem of exceeding the code limits for the floor stiffness ratio. This research conducts a seismic performance evaluation and response comparison of the two models. Based on the results of the experiment and simulation, these types of buildings can achieve favorable seismic performance by adopting concrete beams and columns with inner shape steel to strengthen the transfer floor, notwithstanding when the story lateral stiffness ratio at the transfer floor is outside of code limits. It is predicted that the prototype buildings will suffer slight damage under moderate earthquakes but will not collapse when subjected to major earthquakes. In addition, a seismic response comparison was conducted between the two models. The responses show similarities for some aspects, such as mode shapes and frequency reduction. Considering safety, it is suggested to establish and analyze both single and multitower models and to adopt the envelope value for the seismic design of these types of buildings.
Seismic performance evaluation of tall, multitower reinforced concrete buildings with large bottom podiums
Zhou, Ying (author) / Chen, Peng (author) / Wang, Chengyou (author) / Zhang, Lixun (author) / Lu, Liang (author)
Structural Concrete ; 19 ; 1591-1607
2018-12-01
17 pages
Article (Journal)
Electronic Resource
English
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