K型偏心支撑组合高强钢框架抗震性能分析

发布时间：2018-05-01 09:37

本文选题：高强钢 + K型偏心支撑　；参考：《长春工程学院》2017年硕士论文

【摘要】：随着社会经济的发展和科研工作的不断创新,钢结构具有强度高、自重轻、塑性好、拆迁方便、工业化程度高等特点,在国民经济的各个领域得到了大量的应用,在实际工程中最常用的钢结构形式为中心支撑和纯框架。偏心支撑结构形式的引入,将二者的长处发挥到极致。常遇地震作用下,构件大部分处于线性受力阶段,各项性能指标满足规范要求;罕遇地震作用下,偏心体系发挥良好的耗能性能,使得结构不倒塌。目前的钢结构设计施工一般都采用普通强度钢,实际工程中几乎没有偏心支撑高强钢框架,能否将这种新型抗震结构体系运用到实际中,还需要广大研究人员不断改进并完善其抗震性能研究方法,给出可靠全面的设计计算方法和研究理论,力求促进这种偏心支撑高强钢框架在工程中的应用。本文拟采用K型偏心支撑组合高强钢框架结构形式,利用SAP2000有限元结构分析软件进行截面设计,钢框架耗能梁段分别采用剪切型和弯曲型,对三维框架进行Pushover和动力时程分析,研究结构的抗震性能及其塑性铰的分布发展情况,分析结果表明高强钢框架引入耗能梁构建的双重抗侧力体系,可以使耗能梁段作为第一道“保险丝”首先进入塑性,而其他构件基本处于弹性状态;高强钢因为其屈强比及伸长率等不满足规范要求而应用较少,有了偏心支撑和耗能梁的引入,为其在工程的应用提供了可能性。论文试验部分是在西安建筑科技大学结构与抗震教育部重点实验室进行,作为项目的参与者,对K型偏心支撑高强钢框架中的单榀单跨试件进行单调加载和循环加载,将耗能梁段的长度作为单一变量,研究分析试件的破坏形态及主要抗震性能指标。
[Abstract]:With the development of social economy and the innovation of scientific research, steel structure has been widely used in various fields of national economy because of its high strength, light weight, good plasticity, convenient demolition and high degree of industrialization. The most commonly used steel structures in practical engineering are central support and pure frame. With the introduction of eccentric bracing structure, the advantages of the two structures are brought into full play. Most of the members are in the linear stress stage under the frequent earthquake, and the performance indexes meet the requirements of the code. Under the rare earthquake, the eccentric system exerts good energy dissipation performance, so that the structure does not collapse. At present, the design and construction of steel structures generally adopt ordinary strength steel, and there is almost no eccentrically braced high strength steel frame in actual engineering. Can this new aseismic structure system be applied in practice? It is also necessary for many researchers to improve and improve their seismic performance research methods, and to provide reliable and comprehensive design and calculation methods and research theories, in order to promote the application of this eccentrically braced high strength steel frame in engineering. In this paper, K-type eccentrically braced composite high-strength steel frame structure is adopted, and SAP2000 finite element structural analysis software is used to carry out section design. The steel frame energy dissipation beam section adopts shear type and bending type respectively, and the Pushover and dynamic time-history analysis of three-dimensional frame are carried out. The aseismic behavior of structures and the distribution and development of plastic hinges are studied. The analysis results show that the double lateral resistance system constructed by introducing high-strength steel frames into energy-dissipation beams can make the energy-dissipation beam section enter into plasticity first as the first "fuse". However, other members are basically in elastic state, and high strength steel is seldom used because its flexural strength ratio and elongation do not meet the requirements of the code. The introduction of eccentrically braced beams and energy dissipation beams provides the possibility for its application in engineering. The experiment part of the paper is carried out in the key laboratory of the Ministry of structure and Seismic Education of Xi'an University of Architecture and Science and Technology. As a participant of the project, the single single span test piece of K eccentrically braced high strength steel frame is subjected to monotonic loading and cyclic loading. Taking the length of the energy dissipation beam segment as a single variable, the failure patterns and main seismic performance indexes of the specimens are studied and analyzed.
【学位授予单位】：长春工程学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU391;TU352.11

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