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Improving the Seismic Performance of staircases in Building Structures with a Novel Isolator

Computer Modeling in Engineering & Sciences 2020年第8期124卷 415-431页

作者： Yafei Zhang Ping Tan Haitao Ma Marco Donà Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural SafetyMinistry of EducationGuangzhou UniversityGuangzhou510405China Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology Guangzhou UniversityGuangzhou510405China

A staircase provides the main escape way from a building in an ***,it may suffer severe damages or even collapse during an *** improving the seismic performance of staircases,this paper proposes an innovative staircase isolator with the features of lightweight,costeffective and ease of construction and replacement,which is formed by suitable engineering plastic shims between rubber layers.A connection construction scheme is also proposed for the isolated *** performance tests have been carried out to characterize the isolator in terms of mechanic behavior and ultimate *** test results show that mechanical properties of the proposed staircase isolator are excellent and suitable for staircase in building *** order to investigate the influence of staircase on building structural responses,time history analyses of a typical building structure without staircase(WS),with fixed staircase(FS)and with isolated staircase(IS)are conducted and compared within the environment of *** show that staircase isolation can effectively eliminate the diagonal bracing effect of staircase slab and make structural components uniformly *** the novel isolator is employed for staircase in a building structure,there is no vulnerable position in staircase and the performance of staircase in building structure can be greatly enhanced.

关键词： Seismic isolation seismic performance of staircases staircase isolation engineering-plastics rubber isolator rubber isolator

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