尺寸效应对干砌填充墙框架力学性能的影响

发布时间：2018-04-11 14:05

本文选题：干砌墙框架 + 尺寸效应　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：作为我国应用最广泛的建筑结构形式之一，，填充墙框架结构，具有建筑平面布置灵活、室内空间大等优点。钢框架具有施工方便、抗侧刚度大、延性高等优点，目前越来越多地在实际工程中得到应用。作为一种新型的填充墙结构，干砌体填充墙具有良好的延性、耗能性和较小的附加刚度等优点，并能够有效提高结构的抗侧力。干砌体填充墙框架结构的研究对实际工程具有重要的意义。本论文以研究砌块尺寸、墙体尺寸以及梁柱尺寸为主要研究内容，对干砌填充墙钢框架整体的力学性能进行研究，主要包括以下几个方面：利用有限元软件ANSYS对干砌填充墙框架进行拟静力试验仿真，通过课题组已有的试验数据对有限元模型进行调整，并对比验证了仿真模型的合理性。对干砌墙框架结构的力学性能进行分析，得出干砌墙能有效提高整体抗侧力以及墙体应力分布符合层位移滑动情况的结论，提出干砌墙框架抗侧刚度和水平抗侧力的理论公式。建立不同尺寸工况的砌块和墙体模型，绘制出不同工况下结构的荷载-位移曲线、刚度退化曲线、滞回曲线和骨架曲线等。结合结构的应力分布等力学特性，系统的分析和研究了小型、中型、大型砌块尺寸参数以及不同高跨比墙体尺寸参数对钢框架干砌墙力学性能的影响，发现高跨比是影响结构受力机理的主要因素。对三种砌块工况模型进行对比分析，发现砌块尺寸大小对墙体应力分布、刚度退化以及墙体抗侧力贡献均有不同程度的影响，得出一些结论为实际工程提供一定的参考。建立不同尺寸大小墙体和梁柱的干砌墙框架模型，从结构的承载力、刚度、应力分布和耗能大小方面对模型进行分析研究，研究发现墙体尺寸的大小以及梁柱惯性矩比值的大小对干砌墙框架整体力学性能有着重要的影响。通过对精细的单层单跨干砌墙框架模型进行组合，建立双层、三层干砌墙框架模型，进行水平位移加载，观察和分析干砌墙框架的应力分布等力学特性，研究组合情况不同，框墙受力时整体力学性能的变化，并对模型进行相关参数的分析，研究结构的力学发展性能和受力机理，从而达到优化结构的目的。
[Abstract]:As one of the most widely used building structures in China, the infilled wall frame structure has the advantages of flexible layout and large interior space.Steel frame has the advantages of convenient construction, high lateral stiffness and high ductility, so it has been applied more and more in practical engineering.As a new type of infilled wall structure, dry masonry infill wall has the advantages of good ductility, energy dissipation and small additional stiffness, and can effectively improve the lateral force of the structure.The study of dry-masonry infilled wall frame structure is of great significance to practical engineering.Based on the research of block size, wall size and Liang Zhu size, the mechanical properties of dry filled wall steel frame are studied in this paper, including the following aspects:The finite element software ANSYS is used to simulate the quasi-static test of the dry-filled wall frame. The finite element model is adjusted by the existing test data, and the rationality of the simulation model is verified by comparison.The mechanical properties of the frame structure of dry masonry wall are analyzed. It is concluded that dry masonry wall can effectively improve the overall lateral force and the stress distribution of the wall accords with the sliding of floor displacement. The theoretical formulas of lateral stiffness and horizontal lateral resistance of the frame are put forward.The load-displacement curve, stiffness degradation curve, hysteretic curve and skeleton curve of the structure under different working conditions were drawn by building blocks and wall models with different sizes.Based on the stress distribution and other mechanical properties of the structure, the effects of small, medium and large block size parameters and different high span ratio wall size parameters on the mechanical properties of steel frame dry masonry wall are systematically analyzed and studied.It is found that the ratio of height to span is the main factor affecting the stress mechanism of the structure.Through the comparison and analysis of three kinds of block model, it is found that the size of block has different effects on the stress distribution, stiffness degradation and lateral force contribution of the wall, and some conclusions are provided for the practical engineering.The frame model of dry masonry wall with different size and size is established, and the model is analyzed from the aspects of bearing capacity, stiffness, stress distribution and energy consumption of the structure.It is found that the size of wall and the ratio of Liang Zhu's moment of inertia have an important influence on the overall mechanical properties of dry masonry wall frame.Through the combination of fine single-story single-span dry masonry wall frame model, the double-layer and three-story dry masonry wall frame model is established, the horizontal displacement loading is carried out, and the stress distribution of the dry masonry wall frame is observed and analyzed.In order to optimize the structure, the mechanical properties of the frame wall are studied by analyzing the parameters of the model and studying the mechanical development performance and the mechanical mechanism of the structure.
【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】：TU398;TU311

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