型钢混凝土十字形截面短肢剪力墙受力性能研究

发布时间：2018-01-03 11:36

本文关键词：型钢混凝土十字形截面短肢剪力墙受力性能研究　出处：《西安科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：21世纪人们的生活水准不断提高和科学技术日新月异促使住房质量飞跃式的提升,促使新材料和新工艺不断涌现,出现许多新型结构,如型钢混凝土短肢剪力墙,其广泛应用于高层住宅中。在国内对十字形截面型钢混凝土短肢剪力墙受力性能的研究少之又少,因此研究十字形短肢剪力墙的受力性能和抗震性能对指导工程实践及充实理论具有重要的意义。本文利用大型通用软件ANSYS对十字形型钢混凝土短肢剪力墙采用实体建模的方法进行有限元非线性分析,考虑混凝土强度等级、轴压比、墙肢长宽比和型钢配钢率对构件受力性能的影响,建立了13个有限元模型试件,系统分析了型钢混凝土十字形截面短肢剪力墙在循环荷载作用下的滞回性能、骨架曲线、刚度退化特征、型钢和混凝土的应力分布等。阐述了结构在循环荷载作用下,型钢混凝土十字形截面短肢剪力墙的承载能力、变形能力和耗能能力的变化规律、结构的破坏机理等。研究结果表明:混凝土强度等级对结构的受力性能影响很大,混凝土强度等级越高,结构的承载力越大,单调荷载作用下混凝土强度为C40时试件延性最好。循环荷载作用下,混凝土强度为C40时试件耗能能力最大,故建议混凝土强度一般宜选用C40左右;型钢混凝土十字形短肢剪力墙随着墙肢截面长宽比的增大其承载能力和延性呈现先增后减的趋势。循环荷载作用下,截面长宽比较小的构件其滞回性能较差,故建议该比值取值范围为6-7。不同轴压比的型钢混凝土剪力墙在单调荷载作用下压比型钢受力性能较为相似,但循环荷载作用下,轴压比为0.05和0.7的试件滞回性能较差,建议轴压比取值范围为0.25-0.5之间;型钢配钢率较小的构件其滞回性能优于配钢率较大的构件,但承载力相对有所减小,因此选定型钢配钢率时应综合考虑结构滞回性能和承载力。本文通过对型钢混凝土十字形短肢剪力墙在低周反复荷载作用下受力性能的分析,揭示了在地震作用下型钢混凝土十字形短肢剪力墙的抗震性能及工作性能,得出了对型钢混凝土短肢剪力墙的理论研究具有参考价值的结论。
[Abstract]:Twenty-first Century to enhance the living standards of the people and constantly improve the quality of science and technology change rapidly to promote housing leap, promote new materials and new technology constantly emerging, many new structures, such as steel reinforced concrete short pier shear wall, which is widely used in high-rise residential buildings. The research at home and cross section of steel reinforced concrete short pier shear wall the mechanical performance is less and less, so the study of cross shaped short pier shear wall bearing capacity and seismic performance has important significance for guiding engineering practice and enrich the theory. By using the method of ANSYS software of cruciform steel reinforced concrete short leg shear wall by solid modeling of nonlinear finite element analysis, consider the grade of concrete strength, axial compression ratio, shear wall length and width ratio of steel member effect on mechanical performance of steel ratio, established 13 finite element model of the specimen, the system analysis of steel The cross section of concrete short pier shear wall under cyclic loading hysteretic behavior, skeleton curve, stiffness degradation characteristics of steel and concrete stress distribution are expounded. The structure under cyclic load, short pier shear wall cross section of steel reinforced concrete bearing capacity, capacity and variation the energy dissipation capacity of deformation, the failure mechanism of structure. The research results show that concrete strength has great influence on the mechanical properties of the structure, the concrete strength grade is high, the bearing capacity is bigger, the strength of concrete under monotonic load is C40. The best ductility of specimens under cyclic loading, the strength of concrete is C40 the specimen energy dissipation capacity of the largest, so the strength of concrete in general should use C40; steel reinforced concrete short pier shear wall with cross section of wall length to width ratio increases the bearing capacity and ductility are increased first and then decreased The trend. Under cyclic loading, the component section width smaller the hysteretic performance is poor, it is suggested that the ratio of the range of steel reinforced concrete shear wall 6-7. different axial compression ratio under monotonic loading pressure ratio of steel mechanical properties are similar, but under cyclic loading, the axial compression ratio the hysteretic performance is poor in 0.05 and 0.7, suggested that the axial compression ratio range of 0.25-0.5; the content of steel specimens with small hysteretic performance is better than that with the component of the steel rate is larger, but the relative carrying capacity is reduced, so the selected steel ratio should be considered structural hysteretic behavior and the bearing capacity. Based on the analysis of the cruciform steel reinforced concrete short pier shear wall under low cyclic loading stress performance, revealed in the seismic performance and seismic performance of steel reinforced concrete under the cruciform short shear wall, the type of steel The theoretical study of concrete short shear wall has a reference value.

【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398.9

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