Abstract
Pounding phenomena considering structure–soil–structure interaction (SSSI) under seismic loads are investigated in this paper. Based on a practical engineering project, this work presents a three-dimensional finite element numerical simulation method using ANSYS software. According to Chinese design code, the models of adjacent shear wall structures on Shanghai soft soil with the rigid foundation, box foundation and pile foundation are built respectively. In the simulation, the Davidenkov model of the soil skeleton curve is assumed for soil behavior, and the contact elements with Kelvin model are adopted to simulate pounding phenomena between adjacent structures. Finally, the dynamic responses of adjacent structures considering the pounding and SSSI effects are analyzed. The results show that pounding phenomena may occur, indicating that the seismic separation requirement for adjacent buildings of Chinese design code may not be enough to avoid pounding effect. Pounding and SSSI effects worsen the adjacent buildings’ conditions because their acceleration and shear responses are amplified after pounding considering SSSI. These results are significant for studying the effect of pounding and SSSI phenomena on seismic responses of structures and national sustainable development, especially in earthquake prevention and disaster reduction.
Highlights
In recent decades, with urbanization, city blocks containing clusters of closely spaced buildings are becoming more prevalent
The main objectives are to carry out numerical simulation on the effects of pounding and Structure–Soil–Structure Interaction (SSSI) phenomena based on a practical engineering project and propose the corresponding computational numerical method, providing a numerical simulation with practical applications in engineering and a reference for future engineering designs
There are three foundation types used in the model, which are the rigid foundation (FIXED), box foundation (BOX) and pile foundation (PILE), respectively
Summary
With urbanization, city blocks containing clusters of closely spaced buildings are becoming more prevalent. Studying pounding between adjacent buildings considering SSSI is of great importance to predict seismic responses of structures. Studying pounding between adjacent buildings considering SSSI is of great importance to the sustainable development of whole country. Filiatrault et al [20] made shake table tests of pounding between adjacent unequal-height steel framed model structures. Chau et al [21] designed shake table tests of two steel towers whose natural frequencies and damping ratios are different to study the pounding phenomenon, under different combinations of stand-off distance and seismic excitations. Studying pounding between adjacent buildings considering SSSI is very important for the aseismic design of buildings, which could promote structural resistance to earthquake events and help building a sustainable city. The main objectives are to carry out numerical simulation on the effects of pounding and SSSI phenomena based on a practical engineering project and propose the corresponding computational numerical method, providing a numerical simulation with practical applications in engineering and a reference for future engineering designs
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