Abstract
Firstly, constitutive models of two unequal height adjacent ten-story and six-story reinforced concrete frame structures were established based on OpenSees software in which a series of separation distances are set for incremental dynamic analysis (IDA), respectively. Secondly, the seismic vulnerability curves by postprocessing programming in Matlab software were obtained based on IDA datum, and the optimal separation distances of adjacent buildings with and without connecting dampers were obtained by comparing the seismic vulnerability of adjacent building at different separation distance and the seismic hazard analysis. Finally, a scaled model shaking table test of adjacent steel frame structures was performed. The conclusions are obtained by comparing the measured results of the test with those obtained by the OpenSees analysis, such as acceleration and displacement. The conclusions show that when two adjacent buildings are not connected with a damper, the distance of adjacent structures is suggested to be 0.3 m under moderate and strong earthquakes and the distance of adjacent structures is suggested to be a specified value of 0.24 m under rare earthquakes. When two adjacent buildings are connected with dampers, the separation distance is suggested to be 0.1 m under various performance conditions.
Highlights
In order to prevent adjacent buildings from colliding, the most direct and effective method is to increase the distance between adjacent buildings
The Vulnerability Curves Which Are Expressed by the Top-Level Acceleration
The acceleration vulnerability curve of the top layer of the two-layer structure under multiple a values is given to understand the trend of the acceleration of the top layer of the two-layer structure with the increase of ground motion intensity
Summary
In order to prevent adjacent buildings from colliding, the most direct and effective method is to increase the distance between adjacent buildings. Jeng et al proposed a differential spectrum method, namely, the double difference method (DDC method), which was used to solve the minimum separation distance between adjacent linear single degree of freedom (SDOF) structures to avoid collision [1]. Lopez-Garcia and Soong studied the accuracy of four methods of calculating the critical separation distance of adjacent buildings by using the nonlinear single-degree-of-freedom hysteresis structural model under non-stationary seismic excitation [3]. Filiatrault et al [4, 5] and Kasai et al [6] extended the DDC method to the calculation of the minimum separation distance of adjacent nonlinear single-degree-of-freedom structures to avoid collision. In the study of Lin and Weng [7], based on the stochastic vibration theory, the critical separation distance between adjacent buildings was analyzed theoretically by using the linear elastic multiple-degree-offreedom (MDOF) model. This paper will analyze the structural seismic vulnerability of controlled and uncontrolled adjacent buildings under distinction separation distance and obtain the critical separation distance between adjacent structures based on the principle of minimum seismic vulnerability of adjacent structures
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