强震下考虑损伤累积效应的钢管塔动力响应分析  

Dynamic response analysis of steel tube tower under strong earthquake considering damage accumulation effect

作　　者：田利[1] 马瑞升[1] 

机构地区：[1]山东大学土建与水利学院,山东济南250061

出　　处：《地震工程与工程振动》2016年第5期132-138,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51578325;51208285);中国博士后科学基金资助项目(2012M521338)~~

摘　　要：编制了考虑损伤累积效应的材料子程序VUMAT-D,并通过单根钢管轴向等幅加载测试验证了子程序的有效性。基于实际工程,建立大跨越钢管塔的三维有限元模型。采用动力时程分析方法,对强震作用下考虑损伤累积效应和未考虑损伤累积效应的钢管塔动力响应进行了对比分析研究。采用增量动力分析方法,研究钢管塔顶端位移峰值与PGA之间的关系,并提出了变量α来判断结构的抗倒塌能力和倒塌位置。最后研究了节点质量对钢管塔动力响应的影响。研究结果表明:该程序对钢管塔结构的损伤分析具有合理性和有效性;对于强震作用下钢管塔动力时程分析,应当考虑损伤累积效应的影响;节点质量对钢管塔动力响应的影响不可忽略。研究结果对于钢管塔的工作性能的评估以及震后维修加固具有重要的意义。The program that can consider cumulative damage effect is complied and its effectiveness is verified bytest of single steel pipe under cyclic loading. Based on practical engineering, the three dimensional model of a largespan steel pipe tower is established. Considering cumulative damage effect, the dynamic properties of steel pipetower are studied using dynamic time-history method. The collapse of steel pipe tower is analyzed using incrementaldynamic analysis method. The collapse resistant capacity and failure positions of steel pipe tower are investigated byparameter a. The result shows that the program is reasonable and effective; the cumulative damage effect cannot beignored during the time-history analysis of tower under strong earthquake; joint masses of tower cannot be neglec-ted, otherwise the seismic capacity of structure would be overestimated. The research result could provide refer-ences for the evaluation of working performance and reinforcement of steel pipe tower after earthquake.

关 键 词：损伤累积效应 大跨越钢管塔 动力性能 增量动力分析 抗倒塌能力 破坏位置 

分 类 号：TU393[建筑科学—结构工程]