预应力自复位混凝土框架节点恢复力模型研究  

RESEARCH ON RESTORING FORCE MODEL OF THE PRESTRESSED SELF-CENTERING CONCRETE FRAME JOINTS

作　　者：蔡小宁[1] 孟少平[2] 

机构地区：[1]淮海工学院土木工程学院,江苏连云港222005 [2]东南大学混凝土及预应力混凝土教育部结构重点实验室,江苏南京210096

出　　处：《工程力学》2018年第1期182-190,200,共10页Engineering Mechanics

基　　金：国家自然科学基金青年基金项目(51508220);江苏省自然科学基金项目(BK20130408);江苏省高校自然科学基金项目(17KJB560001)

摘　　要：基于角钢-高强螺栓连接的预应力自复位混凝土框架节点(简称PTED节点)具有良好的自复位能力和耗能能力。通过7个PTED节点的低周反复荷载试验,研究其恢复力特性。根据试验结果确定骨架曲线为三折线模型,定义并理论推导骨架曲线对应的关键状态点,构建节点恢复力滞回规则,进而建立节点恢复力滞回模型。计算结果表明:该文建立的节点骨架曲线、恢复力滞回模型以及计算所得的耗能能力均与试验结果较吻合,验证了建立的恢复力模型的有效性,可用于PTED节点和结构的弹塑性分析。The prestressed self-centering concrete frame joints with angle-high strength bolts-connection （simplified as PTED joints） have good self-centering capacity and energy dissipation capacity. In order to study the restoring force characteristics, the tests of 7 PTED joints were conducted under low cyclic loading. According to the test results, the trilinear skeleton curve model was determined. The theoretical derivations for the key points of the skeleton curves were obtained. The hysteretic restoring force rules for the joints were constructed. The hysteretic restoring force model was established. The calculated results show that the skeleton curves, the established hysteretic restoring force model and the calculated energy dissipation capacity are in good agreement with the experimental results. The effectiveness of the established restoring force model was verified. The established restoring force model can be used for the elastoplastic analysis of the PTED structure.

关 键 词：自复位 角钢 预应力 抗震性能 恢复力模型 

分 类 号：TU378.4[建筑科学—结构工程]