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拟动力试验尤其结合子结构技术,可用来进行大规模的结构试验。该技术的一个延伸就是将异地多个实验室的试验资源通过互联网连接在一起协同进行结构远程试验。在课题组业已开发的网络化结构实验室平台NetSLab的基础上针对多层剪切型房屋结构模型开发了一个标准化的开放式多自由度体系远程协同拟动力试验程序,包括控制中心、真实试验机、虚拟试验机和远程观察器四个模块,各个模块之间通过网络通讯平台传输试验控制信号及反馈数据。为了验证该程序的可行性及有效性,进行了十层钢管混凝土组合框架结构在三个水准地震作用下的远程拟动力试验。整体框架结构被划分成两个子结构,底部两层进行试验,其余各层进行非线性模拟,同时考虑各个子结构之间边界条件的模拟。试验结果表明,钢管混凝土组合体系在地震作用下表现出良好的抗震性能,远程协同试验程序为研究大型复杂结构的抗震实验提供平台,可以达到提高综合试验能力及资源共享的目的。
Quasi-dynamic test, especially combined with sub-structure technology, can be used for large-scale structural tests. An extension of this technology is to connect experimental resources from multiple laboratories in different places to carry out structural remote testing through the Internet. Based on NetSLab, which is a network structural laboratory platform that has been developed by the research group, a standardized open multi-degree-freedom system for remote coordinated quasi-dynamic testing is developed for multi-story shear building structure model, including control center, real testing machine , Virtual test machine and remote observer four modules, each module through the network communication platform to transmit test control signals and feedback data. In order to verify the feasibility and effectiveness of the program, the ten-story CFST composite frame under long-range quasi-dynamic tests under three levels of earthquakes is carried out. The overall frame structure is divided into two substructures, the bottom two layers are tested, and the remaining layers are non-linearly simulated, taking into account the simulation of the boundary conditions between substructures. The experimental results show that the CFST system shows good seismic performance under the earthquake. The remote collaborative test program provides a platform for studying the seismic experiments of large and complex structures, which can improve the comprehensive experimental ability and resource sharing.