钢管混凝土框架抗震性能分析-结构工程专业论文.docxVIP

摘要【钢管混凝土框架是一种新型的结构体系，由于它具有较好的抗震性能．现在 摘要 【钢管混凝土框架是一种新型的结构体系，由于它具有较好的抗震性能．现在 越来越多的高层建筑都采用钢管混凝土柱。目前国内外许多学者围绕钢管混凝土 压弯构件反复荷载下的{带回性能做了许多研究工作，但对于钢管混凝土框架这种 结构体系所做的动力性能方面的研究从理论上和实验上来说都比较少。本文从这 一想法出发，以钢管混凝土框架为对象，采用时程分析方法对其进行非线性动力 计算，并将其与钢筋混凝土框架和钢框架进行对比寸本文所做的研究工作主要有 以下几个部分： 1．在对钢管混凝土压弯构件现有恢复力模型分析的基础上本文中提出了一种 新的胁币滞回模型，并将此模型与试验结果进行比较，吻合良好。 2．本文编制了时程分析程序，对钢筋混凝土框架、钢管混凝土框架进行非线 性动力计算，并对它们的经济性能进行对比分析。份析表明，小震作用下钢管混 凝土框架难以显示其抗震优越性，大震作用下由于柱的屈服，其饱满的滞回模型 的优越性才得以体现，因此在多地震地区采用钢管混凝土框架具有一定意义。虽 然单从钢材和混凝土造价来看，钢管混凝土框架要高过钢筋混凝土框架，但考虑 旋工周期以及模板，支架等其他费用，钢管混凝土框架并不会比钢筋混凝土框架 1 造价高。，} 3．对钢管混凝土框架和钢框架也进行了同样的比较分析，相同地震作用下具 有相近位移反应的两种框架，由于钢框架用钢量较多，钢管混凝土框架将更具有 优势。 【关键词】钢管混凝土框架i滞回模型，时程分析方法，、经济性分析 ABSTRACTConcrete ABSTRACT Concrete Filled Steel Tubnlar(CFSD column system，a new hybrid system,has been applied in high·rise buildings increasingly in recent years because of its high seismic performance．Now researchers inland or outland have done a lot of research on the hysteretic performance on CFST beam—columns under reversed cyclic load，but the research on CFST column system’S dynamic performance is still scarce．China is a country liable to OCCUr earthquake in some cities，CFST column system will have great prospect in application．So the researeh on its dynamic performance is an urgent and significative task．This paper USeS time—history method to deal with the nonlinear dynamic analysis of CFST column flame under earthquake and compared it to RC and Steel frame．The main contributions in this paper are as follows： 1．Based on the current restoring—force model of CFST beam-columns．a new M-庐 hysteretic model is presented．This model shows good agreement with the test results． 2．The nonlinear time history programs are compiled and the response of CFST，RC frame under earthquake is calculated by these programs and the cost efficiency estimation of them is also investigated．The results showed that the CFST column is difficult to exhibit its hi曲aseismic performance under minor earthquake，while in severe earthquake the adva