三层新型装配式平面钢框架拟动力试验研究

发布时间：2018-01-30 10:22

本文关键词： 装配式钢结构组合梁钢板剪力墙防屈曲支撑拟动力试验多尺度有限元　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：钢框架-抗侧力构件体系作为装配式钢结构住宅常用体系之一,因其具有绿色环保以及便于产业化的优点而拥有广阔的应用前景。本文在已有装配式可变梁高节点以及钢-混凝土组合梁研究成果的基础上,采用试验与数值模拟相结合的方法,针对由它们组合而成的新型钢框架-抗侧力构件体系的抗震性能进行了系统的研究。主要的研究内容如下:1)试验研究:采用拟动力试验方法,试件根据按7度设防设计的钢框架-抗侧力构件体系原型以1:2的几何缩尺比设计得到,分为钢框架-全钢防屈曲支撑和钢框架-钢板剪力墙两种类型,均采用位移控制的方式进行加载。通过分析各地震动作用下结构体系的响应和现象,了解体系在设防烈度地震动作用下的变形是否满足规范要求,以及在大震作用下的破坏模式和失效机理,并重点考察了各构件及其连接节点在结构中的基本力学性能和破坏模式。2)数值研究:采用ABAQUS软件建立两种试件的精细化模型,并利用已有的试验结果验证数值模型的合理性;在此基础上,通过拟动力全过程分析了解体系和构件在地震动作用下的破坏机理以及响应规律。同时为提高数值计算效率,开展结构体系的多尺度有限元模型研究,提出了可变梁高式节点以及组合梁的合理简化方法,并通过算例验证了方法的正确性。试验研究和数值研究的结果表明:两种试件在地震荷载作用下的变形均能满足抗震规范的要求,且具有良好的抗震性能和耗能能力;可变梁高式节点满足强节点的要求,其在正负弯矩作用下多发生偏心受压扭转变形以及钢接头腹板受压鼓曲;钢-混凝土组合梁的破坏开始于梁端的斜裂缝,延伸至梁中段的水平裂缝;端板失稳是防屈曲支撑失效的主要形式之一,需进行构造加强;两边连接钢板剪力墙破坏为四个角部钢板墙螺栓孔的拉坏,可对其连接处进行加厚;试件多尺度有限元模型较实体模型刚度稍大,计算误差在弹性阶段小于5%。
[Abstract]:The steel frame-lateral force resistant member system is one of the commonly used steel structure housing systems. Because of its green environmental protection and the advantages of industrialization, it has a broad application prospect. This paper based on the existing research results of fabricated variable beam high joint and steel-concrete composite beam. The method of combining experiment with numerical simulation is adopted. The aseismic performance of a new steel frame-lateral member system composed of them is studied systematically. The main research contents are as follows: the pseudo-dynamic test method is adopted. According to the 7 degree fortification design of steel frame-lateral force resistant member system prototype with 1: 2 geometric scale ratio design, it can be divided into two types: steel frame-steel buckling bracing and steel frame-steel shear wall. By analyzing the response and phenomenon of the structure system under the action of local vibration, we can know whether the deformation of the system under the action of fortification intensity ground motion meets the requirements of the code. And the failure mode and failure mechanism under the action of large earthquakes. The basic mechanical properties and failure mode of each component and its joints in the structure are investigated. The detailed models of two kinds of specimens are built with ABAQUS software. The rationality of the numerical model is verified by the existing experimental results. On this basis, the failure mechanism and response law of the system and members under the action of ground motion are analyzed through the whole process of pseudo-dynamic analysis, and the efficiency of numerical calculation is improved. The multi-scale finite element model of structural system is studied, and a reasonable simplified method of variable beam height joint and composite beam is proposed. The experimental and numerical results show that the deformation of the two specimens under earthquake load can meet the requirements of seismic code. And has good seismic performance and energy dissipation capacity; The variable beam high type joints meet the requirements of strong joints. Under the action of positive and negative moment, eccentric compression and torsion deformation and buckling of steel joint web are often occurred. The failure of steel-concrete composite beam begins with the oblique crack at the end of the beam and extends to the horizontal crack in the middle of the beam. End plate instability is one of the main failure forms of buckling bracing, which needs to be strengthened. The failure of the shear wall connected with the steel plate on both sides is the tensile failure of the bolt holes of the four corners of the steel plate wall, which can be thickened at the joint; The stiffness of the multi-scale finite element model is slightly larger than that of the solid model, and the calculation error is less than 5 in the elastic stage.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU391

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