基于隔震的RC框架结构抗震性能分析

Seismic Performance Analysis of RC Frame Structure Based on Isolation

近年来因为地震我国遭受了巨大的经济损失,现今人们对结构的安全性更加重视,因此,更安全可靠的抗震技术也成为抗震研究的重点。针对钢筋混凝土(RC)结构在遭受外力作用时的结构破坏模式进行研究分析,考查钢筋混凝土框架结构隔震抗震性能。研究表明对非隔震的RC框架进行动力时程分析找出结构薄弱层,再将隔震支座分别安装在结构基础层、薄弱层以及结构顶层并对各结构模型进行模态分析,对比隔震支座的位置对结构前六个振型的周期、频率的影响,综合考虑经济和社会多种因素,对大多数情况下的RC框架结构,建议采用基础隔震方案。

In recent years,China has suffered enormous economic losses because of the earthquake.Nowadays,people pay more attention to the safety of the structure of the buildings.Therefore,safer and more reliable seismic technology has also become the focus of earthquake resistance research.The structure of reinforced concrete（RC） structure subjected to external force Failure mode is researched and analyzed,to check the seismic isolation performance of reinforced concrete frame structure.The research shows that time history analysis of non-isolated RC frame can be used to find the structurally weak layer.Then,the isolation bearings are installed on the foundation layer,the weak layer and the top layer of the structure respectively,and the modal analysis of each structure model is carried out.The impact of the position of isolation bearings on the period and frequency of the first six modes of structure is compared.In terms of economic and social factors,it is suggested that for the RC frame structure,in most cases,the basic isolation scheme should be adopted.