考虑填充墙效应的RC框架结构基于性能的抗震评估

发布时间：2018-03-16 14:55

本文选题：填充墙框架　切入点：等效杆　出处：《华南理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：填充墙起着分隔房间的作用，普遍存在于框架结构中。填充墙对框架结构承载力和刚度具有重要影响已被普遍认同，但目前设计仍把填充墙作为非结构构件，通过周期折减笼统考虑填充墙贡献。在地震区，忽略框墙相互作用并不总是安全的，填充墙增大结构刚度，同时也增大了地震作用。震害表明，填充墙竖向布置不规则可能造成结构形成薄弱层而破坏，填充墙平面布置不规则可能造成结构扭转破坏，除了刚度效应外，填充墙还会对主体结构构件产生约束效应。填充墙在很大程度上影响着框架结构抗震性能。近年来，基于性能的抗震设计方法成为国内外结构抗震设计理论研究的热点，考虑填充墙效应后对框架结构抗震性能的评估研究还处于初步阶段，，仍需大量的研究工作。本文的主要工作如下： 1.对近60年来国内外关于填充墙框架结构的研究进行了较系统的总结，包括填充墙对框架结构承载力及刚度的影响及其相关影响因素，填充墙框架的破坏模式，填充墙框架的计算模型，对比分析了填充墙微观模型和等效杆宏观模型的优缺点。 2.使用PERFORM-3D软件对比不同学者提出的等效杆宽度计算公式的精确性，最终选取FEMA中采用的等效杆宽度计算公式，对一单层单跨实体填充墙框架和一单层单跨开洞填充墙框架低周往复试验进行模拟分析，数值模拟结果与实验吻合较好。 3.按照现行规范设计不同跨度的填充墙框架结构，使用Pushover静力弹塑性分析方法研究了不同宽高比填充墙及不同填充墙布置对框架结构抗震性能的影响。研究表明，不同宽高比填充墙对结构抗侧刚度和承载力提高程度不同，填充墙竖向不规则布置将形成薄弱层而破坏。 4.总结国内关于填充墙框架梁柱构件及填充墙变形性能指标，给出填充墙框架抗震性能水准划分细则。提出应根据结构在不同地震水准作用下实际受力情况动态查询构件破坏形态，再查询相应破坏形态下构件变形性能指标限值以评估构件性能。对7度和8度空框架、满布填充墙框架、底部大空间填充墙框架进行动力弹塑性分析，根据结构性能水准与构件性能水准的关系，对不同填充墙布置的框架结构抗震性能进行评估。
[Abstract]:The infilled wall is widely used in the frame structure. It is generally accepted that the infilled wall has an important influence on the bearing capacity and stiffness of the frame structure, but the infilled wall is still regarded as a non-structural member in the design. The contribution of infill wall is generally considered by periodic reduction. In earthquake region, it is not always safe to ignore the frame-wall interaction. The infill wall increases the stiffness of the structure and also increases the seismic action. Irregular vertical arrangement of infilled walls may lead to the formation of weak layers and destruction of structures, and irregular layout of infilled walls may cause torsional damage of structures, except for stiffness effect. The infilled wall will also have a constraint effect on the main structural member, and the infilled wall will affect the seismic behavior of the frame structure to a great extent. In recent years, performance-based seismic design methods have become the focus of theoretical research on seismic design of structures at home and abroad. A lot of research work is still needed. The main work of this paper is as follows:. 1. The research on infilled wall frame structure has been systematically summarized in recent 60 years, including the influence of infilled wall on the bearing capacity and stiffness of frame structure and its related factors, and the failure mode of infilled wall frame. The advantages and disadvantages of the microcosmic model and the macroscopic model of the equivalent rod are compared and analyzed in the calculation model of the infilled wall frame. 2. Using PERFORM-3D software to compare the accuracy of the equivalent rod width calculation formula proposed by different scholars, and finally select the equivalent rod width calculation formula used in FEMA. The low cycle reciprocating tests of a single-story single-span solid infilled wall frame and a single-story single-span cavity infilled wall frame are simulated and analyzed. The numerical simulation results are in good agreement with the experimental results. 3. According to the current code, the influence of different ratio of width and height of infilled wall and different arrangement of infilled wall on seismic performance of frame structure is studied by Pushover static elastic-plastic analysis method. The lateral stiffness and bearing capacity of infilled walls with different ratio of width to height are different, and the vertical and irregular arrangement of filled walls will result in weak layers and failure. 4. Summarize the deformation performance indexes of Liang Zhu members and infilled walls in China. The detailed rules of seismic performance leveling of infilled wall frame are given. It is proposed that the failure form of the member should be dynamically inquired according to the actual stress situation of the structure under different earthquake leveling. In order to evaluate the component performance, the finite value of deformation performance index of the member in the corresponding failure form is inquired. The dynamic elastic-plastic analysis of the 7 degree and 8 degree empty frame, the full filled wall frame, the large space infilled wall frame at the bottom is carried out, and the dynamic elastoplastic analysis is carried out. According to the relationship between structural performance level and member performance level, the seismic performance of frame structures with different infilled walls is evaluated.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.4;TU352.11

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