【作者】 张国伟； 郭玉荣； 肖岩；

【Author】 ZHANG Guo-wei~1 GUO Yu-rong~1 XIAO Yan~(1,2) (1.Hunan University,Changsha,China; 2.University of Southern California,Los Angeles,USA)

【机构】 湖南大学土木工程学院；

【摘要】 远程协同试验是基于互联网的,通用开放的新一代结构试验系统.通过网络协同可以实现不同试验室之间的联机协同工作,最大地实现试验室资源的共享和利用,从而提高对结构工程领域复杂问题的研究能力.在网络协同试验平台 NetSLab 控制下,成功实现了钢管混凝土(CFT)柱的拟动力试验和模拟.通过试验, 研究了钢管混凝土构件在地震荷载作用下的动力反应、力学性能以及刚度退化状况.试验参照 SAC 联合研究计划划分地震波的标准,选取了三个具有不同超越概率的地震波.试验结果表明随着峰值加速度的增大, 试件的累积损伤加大,伴随着明显的刚度退化,塑性铰区域形成,核心混凝土压碎.根据试验结果,本文建立了钢管混凝土柱刚度退化的三折线模型,并对其进行了弹塑性时程分析.与试验数据相比,分析结果能够满足精度要求,可以用来模拟分析钢管混凝土柱在地震过程中的动力反应.更多还原

【Abstract】 Based on internet technology,the remote testing is a new opening test system with widely use in structure test.It’ s developed to facilitate the shared use of various structural testing equipment located remote- ly and expected to enhance the research capability of dealing with complicated problems in structural engineer- ing.Under control of the network platform,NetSLab,a networked pseudo-dynamic test and simulation on a CFT column was carried out successfully.The seismic behavior such as dynamic response,mechanical per- formance and stiffness degradation of CFT columns were studied with the test.Three representative ground mo- tions with different exceedance probabilities in 50 year period were chosen from the SAC recommendations. The test shows that as peak acceleration of the ground motion increased,accumulated damage of the specimen increased with obvious stiffness degradation,the plastic hinge region formed with concrete core crushed.A tri -linear stiffness degradation model was proposed for time-history analysis.It shows that the model makes the simulation satisfied the test well.更多还原