栓焊连接钢框架—钢板剪力墙结构抗震性能试验研究和理论分析

发布时间：2018-04-27 05:39

本文选题：钢框架-钢板剪力墙 + 栓焊连接　；参考：《西安建筑科技大学》2014年博士论文

【摘要】：钢板剪力墙是一种有效的抗侧力体系,具有初始侧向刚度大,能量耗散能力好,延性大等优点。钢板剪力墙与钢框架两者可以组成钢框架-钢板剪力墙结构双重抗侧力体系,目前,对该结构体系的研究很不充分。本文针对栓焊连接的钢框架-钢板剪力墙结构体系,对其抗震性能展开试验研究和理论分析,主要做了以下几个方面的工作。按照我国相关设计规范,设计了一幢9层钢框架-钢板剪力墙结构,作为试验研究模型结构设计的主要依据。并分析了钢板墙的存在对框架梁、柱内力分布的影响规律,以及双重抗侧力体系的有效性。选取原型结构底部两层中间跨的钢板剪力墙,按几何相似系数为1/3进行缩尺试件设计。为了利用墙板屈曲后的强度,对缩尺试件的墙板厚度进行适当减小,并考虑不同墙板加劲形式,得到了3榀两层单跨栓焊连接钢框架-钢板剪力墙结构试件。通过水平低周往复加载试验,重点研究试件的破坏过程、破坏模式、承载力、变形性能、滞回性能、耗能能力以及刚度退化规律等;对比分析薄钢板、十字加劲板和斜加劲板对试件整体抗震性能的影响。通过对3个试件应变测量结果的分析,计算了钢框架和钢板剪力墙各自承担的水平荷载和倾覆力矩比例,梁端的轴力和弯矩,深入探讨了钢框架-钢板剪力墙结构作为双重抗侧力体系的受力机理。利用有限元分析软件ABAQUS和SAP2000,分别采用壳单元和等效斜拉杆模型,对3个试件进行有限元建模和分析,研究结构的破坏过程、破坏形态、承载力和变形性能等,分析不同加劲形式对试件拉力带的形成、塑性铰的形成的影响。通过对比模拟结果与试验结果,验证了有限元建模和结果的有效性,为结构抗震性能的进一步分析提供依据。考虑墙板屈曲后的强度,提出了基于剪力墙板承载力的钢框架-钢板剪力墙结构抗震设计方法和步骤。该方法利用美国AISC的相关公式计算钢板墙的抗剪承载力,基于等效斜拉杆模型,建立结构的有限元模型,并根据非线性静力分析得到的结构破坏过程和破坏形态,判断钢板剪力墙设计的合理性。通过算例分析,验证了所提方法的可行性和有效性。基于增量动力分析法,提出了计算钢框架-钢板剪力墙结构体系的结构影响系数和位移放大系数的计算方法和步骤。利用等效斜拉杆模型模拟钢板墙,利用SAP2000软件建立分析模型,依据一定的地震波选取方法,对6榀钢框架-钢板剪力墙结构进行了非线性时程分析。利用IDA分析结果,进而求出结构影响系数R和位移放大系数Cd。此外,还分析了结构层数和结构跨数对结构影响系数和位移放大系数的影响规律,并给出了栓焊连接钢框架-钢板剪力墙结构体系结构影响系数和位移放大系数的建议值。
[Abstract]:Steel plate shear wall is an effective anti lateral force system, which has the advantages of large initial lateral stiffness, good energy dissipation capacity and large ductility. Both steel frame shear wall and steel frame can form a dual anti lateral force system of steel frame steel plate shear wall structure. At present, the research on this structure is not sufficient. This paper is aimed at the steel frame connected by bolt welding. The seismic performance of steel plate shear wall structure is studied and theoretical analysis is carried out. A 9 story steel frame steel plate shear wall structure is designed according to the relevant design standards of our country, which is the main basis for the design of the model structure of the experimental research model. The influence law of the internal force distribution and the effectiveness of the double side resistance system are selected. The steel plate shear walls with two layers in the bottom of the prototype structure are selected according to the geometric similarity coefficient of 1/3. In order to make use of the flexion strength of the wall panels, the wall thickness of the scale specimen is reduced properly, and the stiffening shape of the different wallboard is considered. 3 specimens of steel frame steel plate shear wall structures with two layers of single span bolt welding were obtained. The failure process, failure mode, bearing capacity, deformability, hysteretic behavior, energy dissipation capacity and stiffness degradation law of the specimens were emphatically studied by low level Zhou Wangfu loading test, and the test of steel plate, cross stiffening plate and stiffening plate were compared and analyzed. Through the analysis of the strain measurement results of 3 specimens, the ratio of horizontal load and overturning moment of steel frame and steel plate shear wall, the axial force and bending moment of Liang Duan are calculated, and the mechanical mechanism of steel frame steel plate shear wall structure as a dual anti lateral force system is deeply discussed. The finite element analysis is used. The software ABAQUS and SAP2000, using the shell element and the equivalent slant rod model respectively, make the finite element modeling and analysis of the 3 specimens, and study the failure process, the failure form, the bearing capacity and the deformation performance of the structure, and analyze the influence of different stiffening forms on the formation of the tensile force belt and the formation of the plastic hinge. It proves the validity of the finite element modeling and results, and provides the basis for further analysis of the structural seismic performance. Considering the strength of the wall plate after buckling, the seismic design method and steps of steel frame steel plate shear wall structure based on the bearing capacity of the shear wall plate are proposed. The method uses the relevant formula of AISC in the United States to calculate the shear bearing capacity of the steel plate wall. Based on the equivalent slanting rod model, the finite element model of the structure is established, and the structural failure process and failure form obtained by nonlinear static analysis are used to judge the rationality of the design of the steel plate shear wall. The feasibility and effectiveness of the proposed method are verified by an example. Based on the incremental dynamic analysis method, a calculating steel frame is proposed. The calculation method and steps of the structural influence coefficient and displacement magnification coefficient of the steel plate shear wall structure system are used to simulate the steel plate wall with the equivalent cable-stayed bar model and use the SAP2000 software to establish the analysis model. According to a certain seismic wave selection method, the nonlinear time history analysis is carried out on the 6 steel frame steel plate shear wall structure. The IDA analysis junction is used. The influence coefficient R and the displacement magnification coefficient Cd. are also obtained. The influence of structure layer number and structure span on the influence coefficient of structure and displacement magnification coefficient is also analyzed, and the suggested value of the influence coefficient and the displacement magnification coefficient of the steel frame steel plate shear wall structure with the bolt welding is given.

【学位授予单位】：西安建筑科技大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU352.11;TU391

【参考文献】