带约束拉杆双层钢板内填混凝土组合剪力墙抗震性能研究

发布时间：2018-01-04 04:20

本文关键词：带约束拉杆双层钢板内填混凝土组合剪力墙抗震性能研究　出处：《华南理工大学》2013年博士论文　论文类型：学位论文

【摘要】：超高层建筑结构的剪力墙往往要承担巨大的竖向荷载和地震作用，，若采用普通钢筋混凝土剪力墙，其墙体过厚，导致成本增加及结构整体控制困难。因此，研发出承载力高、延性耗能好且施工简便的组合剪力墙是解决此难题的有效途径。本文中提出一种新型带约束拉杆双层钢板内填混凝土组合剪力墙，并采用试验研究、理论分析、数值模拟相结合的方法对其力学性能和抗震性能进行了研究，具体开展了以下几方面的研究工作：（1）进行了11个带约束拉杆双层钢板内填混凝土组合剪力墙在低周往复荷载作用下的试验研究。试验考察的主要参数为：约束拉杆间距、约束拉杆布置方式、轴压比、剪跨比。分析了上述各个参数对组合剪力墙的破坏形态、滞回曲线、骨架曲线、强度及刚度退化、位移延性系数及耗能等抗震性能的影响。结果表明，带约束拉杆双层钢板内填混凝土组合剪力墙具有良好的承载力、延性和耗能能力，是一种抗震性能良好的新型组合构件。（2）采用纤维模型法，基于MATLAB平台，自编程序建立了带约束拉杆双层钢板内填混凝土组合剪力墙在压弯状态下数值仿真模型。利用试验结果验证了数值模型，在此基础上，分析了混凝土强度、钢板强度、含钢率、端柱和墙身钢板比例、截面高度、混凝土板厚度、约束拉杆直径、约束拉杆屈服强度、墙身约束拉杆间距、边缘端柱约束拉杆间距等参数对组合剪力墙压弯承载力的影响。最后通过数值回归分析，提出了带约束拉杆双层钢板内填混凝土组合剪力墙压弯承载力简化计算公式。（3）提出了适用于ABAQUS分析带约束拉杆方形、矩形钢管混凝土柱的混凝土应力-应变关系式，并基于ABAQUS平台，编写了能考虑多种材料泊松比在整个受力过程变化的子程序USDFLD，完善了材料的本构模型，分析了带约束拉杆方形、矩形钢管混凝土柱的工作机理。基于前面基础，建立了带约束拉杆双层钢板内填混凝土组合剪力墙有限元分析模型，并利用试验结果验证了此模型。在此基础上，研究了组合剪力墙的工作机理并进行了混凝土强度、钢板强度、截面含钢率、墙体剪跨比等参数的分析。基于承载力叠加原理，提出了带约束拉杆双层钢板内填混凝土组合剪力墙抗剪承载力简化计算公式。（4）在试验所获得滞回曲线和骨架曲线的基础上，采用试验拟合法，建立了带约束拉杆双层钢板内填混凝土组合剪力墙的骨架曲线，给出了骨架曲线各个关键点的计算公式。通过刚度退化数据的回归分析给出了刚度退化计算公式和基于试验所得滞回曲线的分析描述了强度退化规律，得到了组合剪力墙的滞回规律。基于简化三折线骨架曲线和滞回规律，建立了带约束拉杆双层钢板内填混凝土组合剪力墙恢复力模型。
[Abstract]:The shear wall structure of high-rise building to bear vertical load and earthquake action are great, if the ordinary reinforced concrete shear wall, the wall is too thick, difficult to control and increase the cost of the whole structure. Therefore, the development of high bearing capacity, good ductility and convenient construction of the composite shear wall is an effective way to solve the problem.
In this paper, a new type of double shear wall concrete filled composite shear wall with tied bars is proposed, and its mechanical and seismic performance is studied by combining experimental research, theoretical analysis and numerical simulation.
(1) studied 11 with binding bars and double steel concrete composite shear walls under cyclic load. The main parameters of the test is: constraint rod, rod constraint arrangement, axial compression ratio, shear span ratio are analyzed. The failure modes of various parameters on composite shear wall the hysteretic curves, skeleton curves, strength and stiffness degradation, seismic displacement ductility coefficient and energy dissipation. The results show that the constrained rod double steel concrete composite shear wall has good bearing capacity, ductility and energy dissipation capacity, is a new type of composite component, good seismic performance.
(2) the fiber model method, based on the MATLAB platform, the program is built with binding bars and double steel concrete composite shear wall numerical simulation model in bending condition. The numerical model was validated by experimental results, based on the analysis of concrete strength, steel strength, steel ratio, end column and wall steel ratio, sectional height, thickness of concrete slab, binding bar diameter, binding bars yield strength, wall spacing of the binding bars. The effects of edge end column spacing of the binding bars and other parameters on the bearing capacity of composite shear wall bending. Finally a numerical regression analysis, presented with binding bars and double steel concrete composite shear wall bending the simplified calculation formula of bearing capacity.
(3) is proposed for ABAQUS analysis with square rod constraint, concrete-filled rectangular steel tube concrete column stress-strain relationship, and based on the ABAQUS platform, written to consider a variety of Poisson's ratio in the whole loading process changes the subroutine USDFLD, improve the material constitutive model, analyzed with square rod constraint and the working mechanism of rectangular steel tube concrete column. Based on the above basis, a concrete composite shear wall finite element analysis model of the double plate with binding bars, and use the result to verify the model. On this basis, studies the working mechanism of composite shear walls and concrete strength, steel strength, steel ratio section, wall shear span ratio parameter analysis. The bearing capacity is put forward based on the principle of superposition, constrained rod and double steel concrete composite shear wall shear capacity calculation formula.
(4) based on the obtained hysteretic curve and skeleton curve, the fitting test, a skeleton curve with binding bars and double steel concrete composite shear wall, gives the calculation formula of the skeleton curve of each key point. Through stiffness analysis gives the calculation formula of stiffness degradation and test analysis the hysteresis curve based on the description of the degradation of strength degradation data regression, the composite shear wall hysteretic rules. The simplified three line skeleton curves and hysteretic rules based on a constrained rod and double steel filled concrete composite shear wall hysteretic model.

【学位授予单位】：华南理工大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU352.11

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