全钢防屈曲支撑试验研究及框架抗震性能分析

发布时间：2018-04-04 18:43

本文选题：防屈曲支撑　切入点：消能减震　出处：《昆明理工大学》2017年硕士论文

【摘要】：近些年来,世界各地地震灾害频发,造成了大量的人员伤亡及财产损失。各国越来越重视工程抗震的研究,尤其是在中国逐渐把抗震要求加入到建筑的强制性条款中,消能减震技术得到了飞速发展,而防屈曲支撑的应用更是为建筑结构的消能减震提供了更多的技术选择。防屈曲支撑不仅能够为建筑结构提供抗侧刚度,还能够为建筑结构在地震作用下进行耗散地震能量。带防屈曲支撑的框架结构体系更是在传统支撑体系性能不足的情况下,为框架结构提供了更为可靠的抗震能力。目前防屈曲支撑的核心技术大部分为专利技术,针对防屈曲支撑的应用大部分集中在对低屈服点、高伸长率钢材作为核心受力单元的研究,构造也相对复杂多样,对防屈曲支撑技术的推广发展产生一定的不利因素。本文首先介绍了防屈曲支撑的基本概念、原理及构成,然后对防屈曲支撑的设计进行了理论分析,结合相应的理论公式在支撑整体稳定性、核心受力单元稳定及防屈曲支撑体系的分析方法等进行了分析。然后采用以普通Q235钢为核心受力单元及约束单元的装配式全钢防屈曲支撑进行了轴向循环往复拉压试验研究,试验表明全部以普通Q235钢做成的核心材料与约束单元具有良好的耗能能力,另外对此种防屈曲支撑在试验中出现的问题提出了一些建议。其次,设计了一栋混凝土框架结构,添加了以Q235钢为核心受力单元的防屈曲支撑,通过有限元软件SAP2000进行了抗震性能分析。结果表明,在原始混凝土框架不满足规范规定的限值要求的情况下,添加防屈曲支撑后,结构的层间位移角等均能满足规范要求,并且具有一定的富余量。
[Abstract]:In recent years, earthquake disasters have occurred frequently all over the world, resulting in a large number of casualties and property losses.More and more countries attach importance to the research of engineering earthquake resistance, especially in China, the seismic requirements are gradually added to the mandatory terms of the building, and the technology of energy dissipation and seismic absorption has been developed rapidly.The application of buckling braces provides more technical options for energy dissipation and vibration absorption of building structures.Anti-buckling bracing can not only provide lateral stiffness for building structure, but also dissipate seismic energy for building structure under earthquake action.The frame structure system with buckling bracing provides more reliable seismic capacity for the frame structure when the performance of the traditional bracing system is insufficient.At present, the core technology of buckling bracing is mostly patented technology. The application of anti-buckling bracing is mainly focused on the research of low yield point and high elongation steel as the core force unit, and the structure is relatively complex and diverse.There are some unfavorable factors to the popularization and development of buckling bracing technology.In this paper, the basic concept, principle and structure of buckling braces are introduced, and then the design of buckling braces is analyzed theoretically.The stability of the core force element and the analysis method of the buckling bracing system are analyzed.Then the axial cyclic cyclic tension and compression tests are carried out on the prefabricated steel anti-buckling braces with ordinary Q235 steel as the core force element and restraint element.The results show that all the core materials and restraint elements made of ordinary Q235 steel have good energy dissipation capacity. Some suggestions are also given for the problems of this kind of anti-buckling braces in the tests.Secondly, a concrete frame structure is designed, and the anti-buckling braces with Q235 steel as the core force element are added, and the seismic behavior is analyzed by the finite element software SAP2000.The results show that under the condition that the original concrete frame does not meet the limit required by the code, the displacement angle between the layers of the structure can meet the requirements of the code and has a certain amount of surplus after the addition of buckle-proof braces.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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