钢管束组合剪力墙抗震性能试验及理论研究
发布时间：2019-05-19 16:52
【摘要】：钢管束组合剪力墙是一种钢与混凝土组合的剪力墙,由不同截面形式的U型钢连接而成,内部浇筑混凝土,形成一种以一字型、T型、L型、Z型为主的多种构造形式的新型组合剪力墙-钢管束组合剪力墙。作为结构体系的主要的抗竖向力和抗侧向力构件,具有钢管壁薄、用钢量经济、施工速度快、构件制作简单、自重轻等优点,有着广阔的适用性和经济社会效益。作为一种新型结构形式,其抗震性能需要深入的研究。本文深入、系统地对钢管束组合钢板剪力墙进行试验研究、数值模拟及理论分析,主要研究内容如下:(1)设计了7个与实际工程完全相同的1:1足尺的一字型钢管束组合剪力墙模型,对其进行低周反复荷载作用下的拟静力试验研究;进行了不同轴压比、剪跨比、U型钢截面尺寸、是否布置栓钉的对比的研究;通过试验揭示墙体的破坏机制、受力机理,分析了各个参数对一字型钢管束组合剪力墙的滞回曲线、骨架曲线、破坏形态、承载能力、强度及刚度退化、位移延性系数及耗能能力等抗震性能指标的影响;并对墙体的剪切变形、侧向变形、关键部分的应变进行了研究,分析了墙体的变形机制。(2)与一字型钢管束组合剪力墙相对比,设计了5个与实际工程完全相符的1:1足尺的T型钢管束组合剪力墙模型,对其进行低周反复荷载作用下的试验研究;进行了不同轴压比、腹板端剪跨比、腹板端U型钢截面尺寸、是否布置栓钉的对比;通过实验揭示T型墙体的破坏机制、受力机理,分析了各个参数对T型组合剪力墙的滞回曲线、骨架曲线、承载能力、强度及刚度退化、位移延性系数及耗能能力等抗震性能的影响,并对T型墙体的剪切变形、侧向变形、关键部分的应变进行了研究,分析了T型墙体的变形机制。(3)采用非线性有限元软件对钢管束组合钢板剪力墙进行数值模拟,用试验结果验证了有限元分析结果的正确性,并对墙体进行了受力全过程分析,研究了钢管束组合剪力墙应力、应变分布规律,得到了剪力墙的受力机理和破坏模式,在此基础上通过参数化分析系统的研究了轴压比、剪跨比、钢材强度、混凝土强度、钢板厚度、U型钢截面尺寸等参数对钢管束组合剪力墙抗震性能的影响。(4)在试验数据和有限元参数化分析的基础上,分析了影响钢管束组合剪力墙承载力的主要因素,基于叠加理论,推导了适用于钢管束组合剪力墙正截面压弯承载力的计算公式;通过分析低剪跨比的钢管束组合剪力墙的受力模式并对影响抗剪承载力的各种因素进行非线性有限元分析,得出钢管束组合剪力墙抗剪承载力的构成,基于叠加理论并通过统计计算回归出参数值,给出抗剪承载力计算公式。(5)在低周反复荷载试验研究的基础上,结合钢管束组合剪力墙的滞回曲线和恢复力特性研究,得到钢管束组合剪力墙骨架曲线的3折线简化计算模型;同时对钢管束组合剪力墙刚度退化规律以及基于试验现象的滞回规则进行分析,得到墙体的滞回规律;基于3折线骨架曲线和滞回规律,建立钢管束组合钢板剪力墙恢复力模型;并给出钢管束组合剪力墙抗震设计建议。
[Abstract]:The steel tube bundle combined shear wall is a shear wall combined with steel and concrete, and is formed by connecting U-shaped steel in different cross-section forms, Z-type combined shear wall-steel tube bundle combined shear wall. As the main anti-vertical force and the anti-lateral force component of the structural system, the invention has the advantages of being thin in steel pipe wall, economical in steel quantity, fast in construction speed, simple in component manufacture, light in self-weight and the like, and has wide applicability and economic and social benefits. As a new type of structure, its anti-seismic performance needs to be studied in-depth. In this paper, the experimental research, numerical simulation and theoretical analysis of the steel tube bundle combined steel plate shear wall are systematically studied. The main contents of this paper are as follows: (1) The model of a 1:1 foot-type steel tube bundle combined shear wall with exactly the same actual project is designed. The research on the quasi-static test under the action of low-cycle and repeated loading is carried out, and the comparison of the different axial compression ratio, the shear span ratio, the section size of the U-shaped steel and whether the bolt is arranged is carried out, and the failure mechanism and the stress mechanism of the wall body are disclosed by the test. The influence of various parameters on the hysteretic curve, the skeleton curve, the damage form, the bearing capacity, the strength and the stiffness degradation, the displacement ductility coefficient and the energy dissipation capacity of the combined shear wall of a word type steel tube bundle is analyzed, and the shear deformation and lateral deformation of the wall body are analyzed, The strain of the key part is studied, and the deformation mechanism of the wall is analyzed. (2) Compared with a word-type steel tube bundle combined shear wall, a 1:1 foot-scale T-shaped steel tube bundle combined shear wall model which is fully matched with the actual project is designed, and the test research under the action of low-cycle repeated loading is carried out; the different axial compression ratio, the web end shear span ratio, The section size of the U-shaped section of the web end and the comparison of the bolt are arranged. The failure mechanism and the force mechanism of the T-shaped wall are revealed by the experiment, and the hysteresis curve, the skeleton curve, the bearing capacity, the strength and the stiffness of the T-type combined shear wall are analyzed. The influence of displacement ductility factor and energy dissipation capacity on the seismic performance of T-shaped wall is studied, and the deformation mechanism of T-type wall is analyzed. (3) The numerical simulation of the steel tube bundle combined steel plate shear wall with the non-linear finite element software is carried out. The correctness of the finite element analysis results is verified by the test results, and the stress and strain distribution of the combined shear wall of the steel tube bundle are studied. The effect of axial compression ratio, shear span ratio, steel strength, concrete strength, thickness of steel plate and section size of U-shaped steel on the anti-seismic performance of steel tube bundle combined shear wall is studied. (4) On the basis of the experimental data and the finite element parametric analysis, the main factors affecting the bearing capacity of the combined shear wall of the steel tube bundle are analyzed, and the calculation formula of the bending bearing capacity of the positive section of the combined shear wall of the steel tube bundle is derived based on the superposition theory. By analyzing the stress mode of the steel tube bundle combined shear wall with the low shear span ratio and the non-linear finite element analysis of various factors affecting the shear bearing capacity, the composition of the shear bearing capacity of the steel tube bundle combined shear wall is obtained, and the parameter value is calculated by statistical calculation based on the superposition theory, The calculation formula of shear bearing capacity is given. (5) Based on the low-cycle repeated load test, the three-fold line simplified calculation model of the steel tube bundle combined shear wall skeleton curve is obtained by combining the hysteresis curve and the restoring force characteristic of the steel tube bundle combined shear wall. At the same time, the stiffness degradation law of the steel tube bundle combined shear wall and the hysteresis rule based on the test phenomenon are analyzed to obtain the hysteresis rule of the wall body, and the restoring force model of the steel tube bundle combined steel plate shear wall is established based on the 3-fold line framework curve and the hysteresis rule. The anti-seismic design proposal of steel tube bundle combined shear wall is given.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TU398.2;TU352.11
，
本文编号：2480890
[Abstract]:The steel tube bundle combined shear wall is a shear wall combined with steel and concrete, and is formed by connecting U-shaped steel in different cross-section forms, Z-type combined shear wall-steel tube bundle combined shear wall. As the main anti-vertical force and the anti-lateral force component of the structural system, the invention has the advantages of being thin in steel pipe wall, economical in steel quantity, fast in construction speed, simple in component manufacture, light in self-weight and the like, and has wide applicability and economic and social benefits. As a new type of structure, its anti-seismic performance needs to be studied in-depth. In this paper, the experimental research, numerical simulation and theoretical analysis of the steel tube bundle combined steel plate shear wall are systematically studied. The main contents of this paper are as follows: (1) The model of a 1:1 foot-type steel tube bundle combined shear wall with exactly the same actual project is designed. The research on the quasi-static test under the action of low-cycle and repeated loading is carried out, and the comparison of the different axial compression ratio, the shear span ratio, the section size of the U-shaped steel and whether the bolt is arranged is carried out, and the failure mechanism and the stress mechanism of the wall body are disclosed by the test. The influence of various parameters on the hysteretic curve, the skeleton curve, the damage form, the bearing capacity, the strength and the stiffness degradation, the displacement ductility coefficient and the energy dissipation capacity of the combined shear wall of a word type steel tube bundle is analyzed, and the shear deformation and lateral deformation of the wall body are analyzed, The strain of the key part is studied, and the deformation mechanism of the wall is analyzed. (2) Compared with a word-type steel tube bundle combined shear wall, a 1:1 foot-scale T-shaped steel tube bundle combined shear wall model which is fully matched with the actual project is designed, and the test research under the action of low-cycle repeated loading is carried out; the different axial compression ratio, the web end shear span ratio, The section size of the U-shaped section of the web end and the comparison of the bolt are arranged. The failure mechanism and the force mechanism of the T-shaped wall are revealed by the experiment, and the hysteresis curve, the skeleton curve, the bearing capacity, the strength and the stiffness of the T-type combined shear wall are analyzed. The influence of displacement ductility factor and energy dissipation capacity on the seismic performance of T-shaped wall is studied, and the deformation mechanism of T-type wall is analyzed. (3) The numerical simulation of the steel tube bundle combined steel plate shear wall with the non-linear finite element software is carried out. The correctness of the finite element analysis results is verified by the test results, and the stress and strain distribution of the combined shear wall of the steel tube bundle are studied. The effect of axial compression ratio, shear span ratio, steel strength, concrete strength, thickness of steel plate and section size of U-shaped steel on the anti-seismic performance of steel tube bundle combined shear wall is studied. (4) On the basis of the experimental data and the finite element parametric analysis, the main factors affecting the bearing capacity of the combined shear wall of the steel tube bundle are analyzed, and the calculation formula of the bending bearing capacity of the positive section of the combined shear wall of the steel tube bundle is derived based on the superposition theory. By analyzing the stress mode of the steel tube bundle combined shear wall with the low shear span ratio and the non-linear finite element analysis of various factors affecting the shear bearing capacity, the composition of the shear bearing capacity of the steel tube bundle combined shear wall is obtained, and the parameter value is calculated by statistical calculation based on the superposition theory, The calculation formula of shear bearing capacity is given. (5) Based on the low-cycle repeated load test, the three-fold line simplified calculation model of the steel tube bundle combined shear wall skeleton curve is obtained by combining the hysteresis curve and the restoring force characteristic of the steel tube bundle combined shear wall. At the same time, the stiffness degradation law of the steel tube bundle combined shear wall and the hysteresis rule based on the test phenomenon are analyzed to obtain the hysteresis rule of the wall body, and the restoring force model of the steel tube bundle combined steel plate shear wall is established based on the 3-fold line framework curve and the hysteresis rule. The anti-seismic design proposal of steel tube bundle combined shear wall is given.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TU398.2;TU352.11
，
本文编号：2480890
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