Firstly, constitutive models of two unequal height adjacent ten-story and six-story reinforced concrete frame structures were\nestablished based on Open Sees software in which a series of separation distances are set for incremental dynamic analysis (IDA),\nrespectively. Secondly, the seismic vulnerability curves by postprocessing programming in Matlab software were obtained based\non IDA datum, and the optimal separation distances of adjacent buildings with and without connecting dampers were obtained by\ncomparing the seismic vulnerability of adjacent building at different separation distance and the seismic hazard analysis. Finally, a\nscaled model shaking table test of adjacent steel frame structures was performed.The conclusions are obtained by comparing the\nmeasured results of the test with those obtained by the Open Sees analysis, such as acceleration and displacement. The conclusions\nshow that when two adjacent buildings are not connected with a damper, the distance of adjacent structures is suggested to be 0.3m\nunder moderate and strong earthquakes and the distance of adjacent structures is suggested to be a specified value of 0.24m under\nrare earthquakes.When two adjacent buildings are connected with dampers, the separation distance is suggested to be 0.1m under\nvarious performance conditions.
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