ECC面层加固砖砌体结构抗震性能试验研究及理论分析

发布时间：2018-05-30 13:21

本文选题：砖砌体结构 + 高延性纤维增强水泥基复合材料　；参考：《西安建筑科技大学》2014年硕士论文

【摘要】：高延性纤维增强水泥基复合材料（Engineering Cementitious Composite，ECC）是一种具有高强度、高延性和拉伸应变硬化等特性的新型建筑材料，可显著提高建筑结构的抗震承载力和变形能力，有效减少地震造成的损伤。本文提出采用ECC面层加固砖砌体结构的方法，对其进行了相关试验研究和理论分析，，主要研究内容有：（1）对5组共15个砖砌体柱进行轴心受压加载试验，研究分析了ECC面层加固后砖砌体柱的承载力和轴向变形性能，提出了ECC面层加固砖柱的轴压承载力计算方法。（2）采用ECC面层对砖砌体窗间墙进行抗震加固，通过1片未加固砖墙、1片钢筋网水泥砂浆面层加固砖墙和3片ECC面层加固砖墙的拟静力加载试验，研究其破坏机理、滞回特性和耗能能力，以此分析ECC面层加固砖砌体窗间墙的效果，给出了5片砖砌体墙对应的抗弯承载力计算方法。（3）对课题组前期的ECC面层加固砖砌体墙试验进行了较为全面的理论分析，针对砖砌体墙4种不同的破坏形态，分别推导了对应的砖砌体墙抗剪承载力和初始刚度计算方法。研究结果表明，采用ECC面层加固可有效抑制砖砌体结构裂缝的开展，提高砖砌体结构的延性和损伤容限，改善砖砌体结构的脆性破坏特征；该加固方法施工简单，对原有建筑结构影响较小；且加固效果显著，能延长砖砌体结构的使用寿命，减少甚至免去震后的修复工作；可作为砖砌体结构加固的一种新技术。
[Abstract]:Engineering Cementitious Composite (Ecc) is a new type of building material with high strength, high ductility and tensile strain hardening, which can significantly improve the seismic bearing capacity and deformation capacity of building structures. Effectively reduce the damage caused by earthquakes. In this paper, the method of strengthening brick masonry structure with ECC surface layer is put forward, and the related experimental research and theoretical analysis are carried out. The main research contents are as follows: 1) five groups of 15 brick masonry columns were subjected to axial compression loading test, the bearing capacity and axial deformation performance of the masonry columns strengthened with ECC face layer were studied and analyzed, and the calculation method of axial compression capacity of brick columns strengthened with ECC face layer was put forward. (2) the ECC surface layer is used to reinforce the brick masonry window wall, and the pseudo-static loading test is carried out to study the failure mechanism of the brick wall strengthened by one unreinforced brick wall and one reinforced concrete mortar layer and three ECC surface layers. Based on hysteretic characteristics and energy dissipation capacity, the effect of strengthening brick masonry window wall with ECC surface layer is analyzed, and the calculation method of flexural bearing capacity corresponding to five brick masonry walls is given. (3) A comprehensive theoretical analysis is made on the experiment of strengthening brick masonry wall with ECC surface layer in the early stage of the research group, and the corresponding calculation methods of shear bearing capacity and initial stiffness of brick masonry wall are derived according to four different failure modes of brick masonry wall. The results show that the crack of brick masonry structure can be effectively restrained by ECC surface reinforcement, the ductility and damage tolerance of brick masonry structure can be improved, and the brittleness failure characteristics of brick masonry structure can be improved. It can prolong the service life of brick masonry structure, reduce or even avoid the repair work after earthquake, and can be used as a new technique for strengthening brick masonry structure.
【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】：2014
【分类号】：TU364;TU352.11

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