【作者】 郭猛；

【导师】 姚谦峰； 袁泉；

【作者基本信息】 北京交通大学 ， 结构工程， 2011， 博士

【摘要】 框架-密肋复合墙结构是由框架与外框密肋复合墙组成的一种新型双重抗侧力结构体系,适应了当前阶段框架结构抗震性能的发展趋势,拓展了密肋复合墙结构的应用领域。框架-密肋复合墙结构中,以密肋复合墙取代或部分取代砌体填充墙、围护墙或隔墙,与外框架形成外框密肋复合墙体,在不大幅增加土建造价的前提下有效地提高了框架结构整体抗震性能和抵御强震的能力,在我国中高地震烈度区具有广阔的应用前景和发展空间。为此,对框架-密肋复合墙结构新体系抗震性能与设计计算方法开展研究有着十分重要的理论意义与工程应用价值。本文在总结相关成果的基础上,以框架-密肋复合墙结构为主要研究对象,利用试验研究、数值模拟与理论分析相结合的方法,对外框密肋复合墙抗震性能与竖向承载力性能、承载力计算方法、框架-密肋复合墙结构体系协同工作性能、设计方法及构造措施等进行了较为详细的研究,为框架-密肋复合墙结构的进一步研究及实际工程应用提供基础。本文完成的主要研究工作如下：(1)外框密肋复合墙抗震性能及竖向承载力试验研究。进行了外框密肋复合墙试件和空框格框架试件的低周反复荷载试验,分析了外框密肋复合墙的破坏形态、承载能力、刚度、延性以及耗能等。试验研究表明,外框密肋复合墙具有良好的抗震性能,其抗剪承载力、弹塑性刚度均优于同等条件下的空框格框架,墙体后期的延性、耗能和抗倒塌能力较好,能够最大限度发挥墙体各组成部分的抗剪耗能作用。外框密肋复合墙试件和空框格框架试件的竖向极限承载力试验表明,外框密肋复合墙具有可靠的竖向承载能力,使得普通框架结构向中高层建筑方向发展成为可能。(2)外框密肋复合墙极限承载力计算方法研究。首先利用通用有限元程序对外框密肋复合墙试件进行非线性有限元分析,有限元模拟结果与试验结果吻合较好；在试验研究和有限元分析的基础上,分析了外框密肋复合墙的抗剪机理,依据极限平衡理论,采用理论与经验相结合的方法建立了外框密肋复合墙抗剪承载力计算公式,并利用试验数据和有限元模拟结果对公式的适用性进行了验证。对外框密肋复合墙正截面压弯承载力进行了研究,针对密肋复合墙的特殊构造形式提出合理的简化模型,以平截面假定为依据,建立了外框密肋复合墙正截面压弯承载力实用计算公式；结合课题组前期对密肋复合墙轴压承载力的研究成果,提出了外框密肋复合墙轴压承载力的计算方法,并利用有限元程序对计算公式的适用性进行了验证。(3)框架-密肋复合墙结构协同工作性能研究。基于Timoshenko梁理论,将框架-密肋复合墙结构视为由剪切型悬臂框架和弯剪型悬臂梁组成的双重抗侧力体系,分别考虑了外框密肋复合墙的弯曲变形和剪切型,采用连续化方法建立了框架-密肋复合墙结构的基本位移微分方程,结合边界条件得出了结构体系弯曲变形、剪切变形及总水平位移的解析表达式,并给出了构件内力计算公式。在概念上将任意双重结构视为由同时考虑弯曲变形、剪切变形的两种子结构组成的密肋复合墙双重抗侧力结构(广义双重抗侧力结构),从而将具有不同变形特征的双重结构进行了统一；建立了密肋复合墙双重抗侧力结构体系的统一位移微分方程,推导出了两个子结构的弯曲变形、剪切变形及总位移的统一计算公式。对框架-密肋复合墙结构、框架-剪力墙结构、密肋复合墙双重抗侧力结构三者之间位移计算公式的相容性关系进行了探讨。(4)框架-密肋复合墙结构设计计算方法及构造措施研究。以框支剪力墙-落地剪力墙共同工作体系为依据,建立了框架-密肋复合墙结构的频率方程及自振周期计算公式,并给出了基本周期的近似计算方法；在结构位移及周期计算的基础上,考虑构件刚度退化规律,提出弹塑性阶段框架-密肋复合墙结构剪力分担率及外框密肋复合墙剪力分配率的实用计算方法；根据外框密肋复合墙的试验结果并考虑建筑功能需求、规范的可执行性等综合因素,分析了弹性阶段和弹塑性阶段框架-密肋复合墙结构层间位移角的控制目标及限值问题。结合已建成使用的密肋结构实践经验,对框架-密肋复合墙结构的材料性能、布置原则和适用高度做出了一般规定；探讨了框架-密肋复合墙结构的施工方法和抗震构造措施,针对密肋复合墙中肋梁肋柱的截面形式和受力特点,对肋梁肋柱钢筋笼的构造形式进行了改进,以期为框架-密肋复合墙结构的工程应用提供参考。更多还原

【Abstract】 ABSTRACT:The frame-multi-grid composite wall structure (FCWS) is a new type dual structure consisting of frame and multi-grid composite wall with outer frame. The dual structure is suitable well for the development trend of the frame structure at present, and expands the application scope for the multi-grid composite wall structure. Substituting the infill walls and the partitions of frame structure by RC multi-grid composite walls makes FCWS. Compared with frame structure, the construction cost of FCWS is not increased greatly, and the whole seismic performance of FCWS is improved effectively. There is an extensive application outlook and development space for FCWS in our country. Research on the seismic performance and design calculation method of FCWS is meaningful both in theory and in practice.Through model tests, numerical simulation and theoretical analysis of FCWS, and based on the prior related study results, follows aspects were investigated:seismic performance and vertical bearing capacity of the composite wall with outer frame, ultimate strength calculation method of the wall, cooperative work mechanism, design calculation methods of the structural system and the seismic construction measures. The results of this study provide a basis for more theoretical research and application of FCWS in practice. The main parts of work in the thesis are as follows:(1) Research on seismic performance and vertical load bearing capacity of the composite wall with outer frame through experiments.Cyclic reversed loading tests were conducted on composite wall with outer frame specimens and frame specimen without infill blocks of half scale. Failure process and the seismic performance including bearing capacity, stiffness, ductility and energy-dissipation capability were investigated. The tests results indicated that the composite wall with outer frame possessed good cooperative work performance and double anti-lateral force features, and the shear capacity and energy consumption of the composite wall with outer frame were better than those of common frame or frame with infill blocks significantly. The inner composite wall can share external load effectively in the whole process. It also possessed good ductility and bearing capacity, and can play an important role to dissipate energy at large displacement cyclic stage. Vertical load bearing capacity tests were conducted on composite wall with outer frame specimens and frame specimen without infill blocks of half scale. The test results indicated that the vertical load bearing capacity of the frame-composite wall was enough, and it was possible to construct middle-high building with the frame-composite wall structure system.(2) Research on calculation method of the ultimate bearing capacity of the composite wall with outer frame.Nonlinear finite element analysis of composite walls with outer frame was made using ANSYS program, and the results of FEA agreed well with those of experiments. Based on the experiments and FEA analysis, the general shear resistance mechanism of the wall was investigated. Through experiences and theoretical analysis, formula for calculating the shear load-bearing capacity of the frame-composite wall was proposed according to the ultimate balance theory. And its accuracy was verified by the test and FEA results.Research on the calculation method of normal section compression-bending capacity for the frame-composite wall was made. The simplified calculation model for the wall was proposed according to the special form of the wall. Based on assumption of section in plane, the ultimate strength calculation formulas of normal section of the composite wall with outer frame were proposed. In addition, the practical calculation formula of the axial load-bearing capacity of the wall was also proposed, and the accuracy of the formula was verified by FEA program.(3) Research on cooperative work mechanism of the frame-composite wall structure.Based on the fundamental theory of Timoshenko beam, the frame-composite wall structure is regarded as double anti-seismic system consisting of shear type frames and shear-flexural type cantilever beams. The fundamental differential equation of the displacement was established by the continuous approach, and its analytical solution of displacement and internal force were derived respectively.The arbitrary dual structure could be regarded as a dual structure consisting of two substructures in concept. Horizontal deformation of the substructure consists of bending deformation and shear deformation. The unified displacement differential equation of generalized structure with double resistance to lateral force was established by deformation continuation approach, and the unified displacement analytical solutions of the dual structure were derived which include bending deformation solution, shear deformation solution and the total deformation solution. Relation of the displacement calculation method among the frame-composite wall structure, the frame-shear wall structure and the dual structure with the multi-grid walls was discussed. (4) Research on seismic design calculation methods and construction measures of the frame-composite wall structure system.The frequency equation and the calculation formula of natural vibration period of the frame-composite wall structure were proposed. And the approximate calculation method of natural vibration period of FCWS was also proposed. Based on calculation of structural displacement and natural vibration period, calculation method of shear-sharing ratio for the frame-composite wall structure during elastic-plastic stage was proposed. Limits and control goals of storey drifts of FCWS at elastic and elastic-plastic stages were discussed based on the test results, architectural demanding, and the related codes.Based on the existing multi-grid structures in practice, the general regulations of the frame-composite wall structure, concerning with material performance, arrangement principle of the members, the appropriate maximum height of buildings, were presented. The construction technology and seismic measure details for the structure were discussed. According to the section forms and mechanism characters of grid beams and更多还原