内置钢板-C80混凝土组合剪力墙抗震性能研究
发布时间：2019-01-02 11:48
【摘要】：近年来,我国高层建筑发展迅速,各种高层、超高层建筑不断涌现。内置钢板-混凝土组合剪力墙因其具有承载力高、延性好、耗能能力强等优点,满足高层建筑对结构构件强度、刚度等性能的高要求。高强混凝土的采用具有节材、可有效减小结构构件的截面尺寸,增加建筑的使用空间等优点,将成为高层建筑领域的优选材料。将高强混凝土应用于内置钢板-混凝土组合剪力墙,能够充分发挥钢、混凝土组合的优势,可提高剪力墙的承载力、减小剪力墙截面面积并具有较大的抗侧刚度,提高建筑结构综合抗震性能,具有广泛的应用前景。但因缺乏高强混凝土应用于内置钢板-混凝土组合剪力墙的研究成果和工程实践经验,使得对高强混凝土的认识和理解不同,限制了高强混凝土的应用。本文采用试验研究与理论分析相结合的方法,对配置混凝土强度等级为C80的内置钢板-混凝土组合剪力墙试件在往复荷载作用下的滞回性能进行分析,研究其承载能力、刚度、延性、耗能能力和破坏特征。根据试验研究及分析结果,提出内置钢板-混凝土组合剪力墙设计建议。论文具体完成了以下内容:(1)共完成了30个剪力墙试件试验研究,其中包括20个剪跨比为1的试件和10个剪跨比为2的试件。系统分析了轴压比、墙身钢板含钢率、墙身分布钢筋配筋率及间距等对试件的承载力、刚度、变形能力、滞回耗能能力及破坏特征的影响。研究结果表明:内置钢板能有效提高剪力墙的抗侧刚度、承载力和耗能能力;内置钢板-剪力墙的设计轴压比限值可取为0.50;在保证一定构造措施下,C80高强混凝土在试件中能够充分发挥其强度,并不影响试件所需的变形能力。(2)采用基于修正斜压场理论的VT2程序进行内置钢板-混凝土组合剪力墙的非线性有限元分析,从应力-应变层次出发,对这种试件在模拟地震作用的低周反复加载试验条件下的受力机制和受力全过程进行了更为深入的模拟分析,并与试验结果进行对比。从每个试件的对比结果看,VT2计算得到的荷载-位移曲线与试验滞回曲线吻合度较高,钢筋混凝土有限元单元受压及受拉破坏位置、形态、裂缝走向均与试验结果近似,具有较高的准确性。(3)通过分析内置钢板对剪力墙受剪承载能力的贡献,在现行规范已有公式的基础上修正型钢及钢板项系数,给出内置钢板-组合剪力墙受剪承载力计算公式,该公式能够更好的反应墙体钢板含钢率对承载力的影响。通过试验数据分析,确定平截面假定仍适用于配置C80高强混凝土的内置钢板-混凝土组合剪力墙受弯承载力计算。
[Abstract]:In recent years, high-rise buildings in our country have developed rapidly, and various high-rise and super-high-rise buildings have been emerging. Because of its advantages of high bearing capacity, good ductility and strong energy dissipation capacity, the built-in steel plate-concrete composite shear wall can meet the high requirements for the strength and stiffness of structural members in high-rise buildings. The use of high-strength concrete has the advantages of saving materials, effectively reducing the cross-section size of structural members and increasing the use space of buildings, which will become the best material in the field of high-rise buildings. The application of high strength concrete in steel plate concrete composite shear wall can give full play to the advantages of steel and concrete combination, can improve the bearing capacity of shear wall, reduce the cross section area of shear wall and have greater lateral stiffness. Improving the comprehensive seismic performance of building structure has a wide application prospect. However, due to the lack of research results and engineering experience in the application of high strength concrete to the composite shear wall of steel plate and concrete, the understanding and understanding of high strength concrete are different, which limits the application of high strength concrete. In this paper, the hysteretic behavior of steel plate concrete composite shear wall with concrete strength grade C80 under reciprocating load is analyzed by means of experimental study and theoretical analysis, and its bearing capacity and stiffness are studied. Ductility, energy dissipation and damage characteristics. According to the experimental research and analysis results, the design suggestion of composite shear wall with steel plate and concrete is put forward. The main contents are as follows: (1) A total of 30 shear wall specimens were studied, including 20 specimens with shear span ratio of 1 and 10 specimens with shear span ratio of 2. The effects of axial compression ratio, steel content of wall steel plate, reinforcement ratio and spacing on the bearing capacity, stiffness, deformation capacity, hysteretic energy dissipation capacity and failure characteristics of the specimens are systematically analyzed. The results show that the internal steel plate can effectively improve the lateral stiffness, bearing capacity and energy dissipation capacity of the shear wall, and the limit value of the design axial compression ratio of the built-in steel plate and shear wall should be 0.50; Under certain structural measures, C80 high strength concrete can give full play to its strength in the specimen. (2) the VT2 program based on modified baroclinic field theory is used to analyze the nonlinear finite element analysis of steel plate concrete composite shear wall, starting from the stress-strain level. In this paper, the mechanical mechanism and the whole process of this specimen under the condition of low cycle repeated loading to simulate earthquake action are analyzed more deeply and compared with the experimental results. From the comparison results of each specimen, it is found that the load-displacement curve calculated by VT2 is in good agreement with the hysteresis curve of the test, and the location of compressive and tensile failure, the shape and the direction of crack of the finite element of reinforced concrete are similar to the experimental results. (3) by analyzing the contribution of the built-in steel plate to the shear bearing capacity of shear wall, the coefficients of section steel and steel plate are modified on the basis of the existing formulas of the existing code. A formula for calculating the shear capacity of steel plate composite shear wall is presented. The formula can better reflect the influence of steel content on the bearing capacity of the wall steel plate. Through the analysis of test data, it is determined that the assumption of plane section is still applicable to the calculation of flexural bearing capacity of steel plate concrete composite shear wall with C80 high strength concrete.
【学位授予单位】：中国建筑科学研究院
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU973.16;TU973.31
，
本文编号：2398444
[Abstract]:In recent years, high-rise buildings in our country have developed rapidly, and various high-rise and super-high-rise buildings have been emerging. Because of its advantages of high bearing capacity, good ductility and strong energy dissipation capacity, the built-in steel plate-concrete composite shear wall can meet the high requirements for the strength and stiffness of structural members in high-rise buildings. The use of high-strength concrete has the advantages of saving materials, effectively reducing the cross-section size of structural members and increasing the use space of buildings, which will become the best material in the field of high-rise buildings. The application of high strength concrete in steel plate concrete composite shear wall can give full play to the advantages of steel and concrete combination, can improve the bearing capacity of shear wall, reduce the cross section area of shear wall and have greater lateral stiffness. Improving the comprehensive seismic performance of building structure has a wide application prospect. However, due to the lack of research results and engineering experience in the application of high strength concrete to the composite shear wall of steel plate and concrete, the understanding and understanding of high strength concrete are different, which limits the application of high strength concrete. In this paper, the hysteretic behavior of steel plate concrete composite shear wall with concrete strength grade C80 under reciprocating load is analyzed by means of experimental study and theoretical analysis, and its bearing capacity and stiffness are studied. Ductility, energy dissipation and damage characteristics. According to the experimental research and analysis results, the design suggestion of composite shear wall with steel plate and concrete is put forward. The main contents are as follows: (1) A total of 30 shear wall specimens were studied, including 20 specimens with shear span ratio of 1 and 10 specimens with shear span ratio of 2. The effects of axial compression ratio, steel content of wall steel plate, reinforcement ratio and spacing on the bearing capacity, stiffness, deformation capacity, hysteretic energy dissipation capacity and failure characteristics of the specimens are systematically analyzed. The results show that the internal steel plate can effectively improve the lateral stiffness, bearing capacity and energy dissipation capacity of the shear wall, and the limit value of the design axial compression ratio of the built-in steel plate and shear wall should be 0.50; Under certain structural measures, C80 high strength concrete can give full play to its strength in the specimen. (2) the VT2 program based on modified baroclinic field theory is used to analyze the nonlinear finite element analysis of steel plate concrete composite shear wall, starting from the stress-strain level. In this paper, the mechanical mechanism and the whole process of this specimen under the condition of low cycle repeated loading to simulate earthquake action are analyzed more deeply and compared with the experimental results. From the comparison results of each specimen, it is found that the load-displacement curve calculated by VT2 is in good agreement with the hysteresis curve of the test, and the location of compressive and tensile failure, the shape and the direction of crack of the finite element of reinforced concrete are similar to the experimental results. (3) by analyzing the contribution of the built-in steel plate to the shear bearing capacity of shear wall, the coefficients of section steel and steel plate are modified on the basis of the existing formulas of the existing code. A formula for calculating the shear capacity of steel plate composite shear wall is presented. The formula can better reflect the influence of steel content on the bearing capacity of the wall steel plate. Through the analysis of test data, it is determined that the assumption of plane section is still applicable to the calculation of flexural bearing capacity of steel plate concrete composite shear wall with C80 high strength concrete.
【学位授予单位】：中国建筑科学研究院
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TU973.16;TU973.31
，
本文编号：2398444
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