ECC加固空斗墙拟静力试验研究

发布时间：2018-10-14 11:27

【摘要】：空斗墙民居目前仍广泛存在于我国南方村镇地区。空斗墙体自身整体性与稳定性很差,在正常使用过程中或自然灾害作用下较易发生破坏甚至失稳倒塌。因此亟需对空斗墙承重房屋进行加固和改造。现有空斗墙加固方法存在施工工艺复杂、造价偏高、破坏原有建筑风貌等缺点,使得实用性较差。本文为解决上述问题,采用ECC材料对空斗墙进行加固,主要研究内容与成果如下:(1)本文重点研究了空斗墙体加固前后的抗震性能。通过2片未加固空斗墙体和13片加固墙体的水平低周反复荷载试验研究分析了3种砌筑方式的空斗墙体在4种加固模式下,墙体的破坏过程、破坏形态、水平抗剪承载力、滞回曲线、骨架曲线、刚度及刚度退化、延性性能、变形性能等特性。试验结果表明采用高延性纤维混凝土(ECC)对空斗墙进行抗震加固是一种经济有效的加固方法。(2)本文采用了ABAQUS整体式有限元模型、8节点六面体线性缩减积分单元、及混凝土塑性损伤模型对空斗原型墙体与加固墙体进行了非线性分析。模拟分析与试验结果对比,表明采用ABAQUS软件分析空斗墙结构抗震性能具有一定可行性。论文对理论分析中存在的问题进行了探讨与归纳,以为后续研究提供参考。
[Abstract]:At present, empty bucket wall houses still exist widely in villages and towns in the south of China. The integrity and stability of the hollow bucket wall itself is very poor, and it is easy to destroy and even collapse in the normal use process or under the action of natural disaster. Therefore, it is urgent to strengthen and rebuild the empty bucket wall bearing housing. The existing reinforcement methods of empty bucket wall have some disadvantages such as complex construction technology, high cost and damage to the original building features, which makes the practicability worse. In order to solve the above problems, ECC material is used to reinforce the hollow bucket wall. The main research contents and results are as follows: (1) the seismic behavior of the hollow bucket wall before and after reinforcement is studied in this paper. In this paper, the failure process, failure form and horizontal shear bearing capacity of three kinds of hollow bucket wall with three kinds of masonry methods under four reinforcement modes are analyzed through horizontal low cycle repeated load test of two unstrengthened empty bucket walls and 13 strengthened walls. Hysteretic curves, skeleton curves, stiffness and stiffness degradation, ductility, deformation, etc. The experimental results show that the seismic reinforcement of hollow bucket wall with high ductile fiber reinforced concrete (ECC) is an economical and effective method. (2) the ABAQUS integral finite element model is used in this paper, and the 8-node hexahedron linear reduced integral element is used in this paper. And concrete plastic damage model, the nonlinear analysis of the hollow bucket prototype wall and the reinforced wall is carried out. The comparison between the simulation analysis and the experimental results shows that it is feasible to use ABAQUS software to analyze the seismic performance of the hollow bucket wall structure. In this paper, the problems in theoretical analysis are discussed and summarized to provide a reference for further research.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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