压弯剪扭复合受力下加固RC震损柱二次地震破坏机理研究

项目名称： 压弯剪扭复合受力下加固RC震损柱二次地震破坏机理研究

项目编号： No.51308065

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 黄华

作者单位： 长安大学

项目金额： 25万元

中文摘要： 确保强震作用下损伤结构加固后的抗震能力，根源在于保证竖向传力构件的安全可靠，研究关键在于选择正确的物理量来表征地震引起的结构破坏，因此必须对实际处于压弯剪扭复合受力状态的损伤构件进行抗震加固研究。项目拟采用加筋高性能砂浆-粘钢联合加固震损钢筋混凝土柱，进行压弯剪扭复合受力下的低周疲劳荷载试验，着重分析首次地震损伤、耐久性损伤及二者耦合效应对加固柱抗震性能的影响；同时对影响加固柱抗震性能的其它因素进行数值分析；在此基础上建立复合受力、已有损伤等对加固构件性能的影响指标；提出加固柱抗震破坏准则和多线型恢复力模型；在已有构件损伤指标加权组合模型基础上，采用权重系数法建立加固结构层损伤模型和整体损伤模型；对OpenSees进行二次开发，将所建模型加入源程序，通过某加固结构的地震损伤性能评估验证程序的可行性。课题的完成将为震损结构加固后的抗震性能评估、基于损伤性能的加固设计和抗倒塌分析提供理论基础。

中文关键词： HPFL-粘钢加固；钢筋混凝土柱；损伤；复合受力；抗震性能

英文摘要： In order to ensure the resistance of damaged structures after strengthening under severe earthquake, the safety and reliability of their vital supporting members must be fully safeguarded, and the key of the research should be focused on choosing right physical quantities to describe the structures' damage caused by earthquake. So the seismic behavior of the strengthened structures must be investigated, which are under combined action of compression-bending-shear-torsion and damaged before strengthening. The low-cycle fatigue testing was conducted to investigate the seismic performance of the damaged RC columns strengthened with high performance ferrocement laminate and bonded steel plates under combined action of compression-bending-shear-torsion. The influence of initial seismic damage, durable injury, and coupling effect between them on the aseismatic performance were mainly discussed. At the same time, numerical analysis was conducted to investigate other factors affecting the seismic performance of strengthened columns. Based on experimental research and theoretical analysis, index of the effect of initial damages and combined action on the aseismatic performance of the strengthened members was proposed, as well as the seismic failure criteria and multi-linear hysteretic model of the strengthened members. O

英文关键词： strengthening with HPFL and bonded steel plates；reinforced concrete column；damage；combined loadings；seismic behavior