子结构拟动力试验方法在老旧住宅外套式加固改造工程中的应用

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。

Application of pseudo-dynamic substructure tests to old residential buildings retrofitted by exterior strengthening method

Pseudo-dynamic substructure tests were applied to a retrofit project of old residential buildings in Beijing. An integration algorithm, i.e. operator-splitting (OS) method, was outlined, and its implementation in pseudo-dynamic test was presented. A test program called Tsinghua online hybrid test program (TOHTP) was developed based on MTS servo hydraulic test system. The test program was applied to pseudo-dynamic tests of a 1/2 scaled model of a residential building retrofitted by exterior strengthening method. Major conclusions obtained in this study are as follows: OS method, which is unconditional stable for most cases, is suitable for pseudo-dynamic test; TOHTP, which implements OS method correctly, is effective to pseudo-dynamic test of building structures; the performance of the retrofitted residential building can satisfy the requirements prescribed in current seismic design code.