建筑结构混合试验平台HyTest开发研究

拟动力试验是一种重要的结构抗震联机试验方法，近年来出现了网络化、有限元化和实时化的趋势，形成了混合试验方法。鉴于混合试验分支多样，涉及数值分析、加载设备与控制等多个学科，为了方便试验的实施与技术的发展，迫切需要使用混合试验平台。为此开发了建筑结构混合试验平台HyTest，能够实现全结构拟动力试验、传统子结构拟动力试验、本地及分布式的基于静力子结构的混合试验和基于动力子结构的P2P混合试验。试验平台采用MTS二次开发编程库VB-COM连接试验控制系统，还可以调用有限元软件OpenSEES和ABAQUS进行数值子结构的分析。为了开展分布式的混合试验，该平台采用Socket通讯机制实现子结构间的数据传输，并采用带中转服务器的通讯模式，解决不同局域网之间的数据传输问题。利用该平台完成了6自由度单层单跨钢框架混合试验，验证了该试验平台的有效性。

Development of HyTest for structural hybrid simulation

Pseudo-dynamic test becomes more powerful when combined with internet technology, finite element analysis software, and real-time technology these years, which is also called hybrid simulation. However, it also becomes more complicated because of the varied hybrid simulation methods and the integration of different subjects, such as numerical analysis and actuator control. Thus a structural hybrid simulation platform is needed to help implement various kinds of hybrid simulation, and HyTest has been developed for this purpose. Four kinds of hybrid simulation methods, that is whole structure pseudo-dynamic test, traditional substructure pseudo-dynamic test, local and distributed hybrid simulation based on static substructures, local and distributed P2P hybrid simulation based on dynamic substructures, are all supported in HyTest. HyTest can communicate with MTS control system by using MTS VB-COM, which is a secondary development programming library. HyTest can also connect finite element analysis software such as OpenSEES and ABAQUS, to simulate the numerical substructures. Internet communication using Socket is adopted to enable data exchange between distributed substructures, and a transit server is proposed when substructures are distributed in different local area networks. The validity of HyTest is illustrated with a hybrid simulation on a one-bay one-story 6-DOFs steel frame.