底部框架—抗震墙结构基于位移的抗震性能评估研究

发布时间：2018-01-07 12:42

本文关键词：底部框架—抗震墙结构基于位移的抗震性能评估研究　出处：《长沙理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：底部框架-抗震墙房屋是我国中小城镇广泛采用的结构形式之一，尤其常见于我国中西部多震地区。2008年汶川大地震中，震区底框结构房屋遭受严重震害，给人民群众生命财产带来巨大损失。在基于性能的抗震设计理论成为地震工程界主流思想的大背景下，砌体结构房屋基于该设计理论上应用相对较少，所以本文围绕底框结构这一典型砌体结构形式，针对其抗震性能评估，结合基于性能的抗震设计理论思想，进行了以下几个方面的研究：（1）引入Push-over分析方法，并对Push-over分析方法在底框结构性能评估过程中水平荷载模式的选取做了讨论。通过参数转换，将我国抗震设计规范与美国ATC-40中反应谱进行等效转化，为本文的研究提供了理论支撑。（2）根据配筋混凝土砌块剪力墙与混凝土剪力墙的力学性能上的相似性，，借鉴已有学者对混凝土剪力墙的模拟方法，提出采用分层壳单元实现对配筋混凝土砌块剪力墙模拟，并通过建立试验墙片模型验证了其准确性与合理性。（3）参照国内外规范及众多学者提出的性能水准划分，建立了以混凝土砌块为主要墙体材料的底框结构抗震性能基于位移的五水准划分，并分别给出了“充分运行”、“运行”、“基本运行”、“生命安全”、“倒塌”性能水准位移角限值量化指标。（4）基于SAP2000分析软件建立底框结构房屋的三维简化弹塑性分析模型，通过将Push-over分析方法与ATC-40推荐的能力谱法相结合，确定了结构在各地震水准下的性能点，并根据各性能点处结构各楼层的层间位移角参照本文提出性能水准划分标准进行结构抗震性能评估。
[Abstract]:The bottom frame-seismic wall building is one of the structural forms widely used in small and medium-sized towns in China, especially in the multi-earthquake areas in the central and western regions of China. 2008 Wenchuan earthquake. Under the background of seismic engineering, seismic design theory based on performance has become the mainstream thought of earthquake engineering, because of the severe earthquake damage to the buildings with frame structure at the bottom of the earthquake area, which brings huge losses to the lives and property of the people. The application of masonry structure building based on this design theory is relatively few, so this paper revolves around the bottom frame structure, a typical masonry structure form, according to its seismic performance evaluation, combined with the performance-based seismic design theory idea. The following studies were carried out: 1) the Push-over analysis method is introduced, and the selection of horizontal load mode in the performance evaluation of bottom frame structure by Push-over analysis method is discussed. The equivalent transformation between the seismic design code of China and the response spectrum of ATC-40 in the United States provides theoretical support for the study of this paper. 2) according to the similarity of mechanical properties between reinforced concrete block shear wall and concrete shear wall, the simulation method of concrete shear wall has been used for reference. A layered shell element is proposed to simulate the shear wall of reinforced concrete block. The accuracy and rationality of the model are verified by establishing the test wall model. 3) referring to the domestic and foreign codes and the classification of performance level put forward by many scholars, a five-level partition of seismic behavior of bottom frame structure based on displacement is established, which takes concrete block as the main wall material. The quantitative indexes of "full operation", "operation", "basic operation", "life safety" and "collapse" are given respectively. 4) based on the SAP2000 analysis software, the three-dimensional simplified elastic-plastic analysis model of the bottom frame structure building is established. By combining the Push-over analysis method with the capability spectrum method recommended by ATC-40, the performance points of the structure under various earthquake levels are determined. According to the displacement angle of each floor of the structure at each performance point, the seismic performance of the structure is evaluated according to the criterion of performance leveling.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU352.11

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