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以北京前三门地区加固改造项目为工程背景,对子结构拟动力试验方法进行应用研究。介绍了用于拟动力试验的数值积分法(OS算法)及其在拟动力试验中的实现,开发了基于MTS电液伺服加载系统的结构拟动力试验软件TOHTP,针对采用外套式加固后的老旧住宅的1/2缩尺模型进行了子结构拟动力试验研究。研究结果表明:OS算法是对于大多数结构为无条件稳定的数值积分算法,适用于子结构拟动力试验;拟动力试验软件TOHTP正确实现了OS算法,对于建筑结构的拟动力试验方便有效;拟动力试验结果验证了加固后的老旧住宅能够满足现行规范的抗震性能要求。
Taking the reinforcement project in Qianmen area of Beijing as the engineering background, the application of the quasi-dynamic test method for substructure was studied. The numerical integration method (OS algorithm) used in pseudo-dynamic test and its implementation in pseudo-dynamic test are introduced. The structural pseudo-dynamic test software TOHTP based on MTS electro-hydraulic servo loading system is developed. The substructure pseudo-dynamic experimental study was conducted on the 1/2 scale model of the old house. The results show that the OS algorithm is an unconditionally stable numerical integral algorithm for most structures and is suitable for substructure pseudo-dynamic test. The TOHTP of pseudo-dynamic test software realizes OS algorithm correctly and is convenient and effective for the pseudo-dynamic test of building structure. The test results verify that the aged old house can meet the seismic performance requirements of current codes.