严重震损钢筋混凝土短柱CFRP加固后的抗震性能试验研究

发布时间：2018-07-10 12:10

本文选题：CFRP + 加固　；参考：《湘潭大学》2017年硕士论文

【摘要】：当前许多建筑物由于受到材料老化、地震损伤等多方面因素影响,其功能已经无法满足使用要求。对已经震损的钢筋混凝土结构,将其全部推倒重建并不合理也不经济,因此对其采用适当的技术手段进行加固修复处理可解决这一问题。在地震中短柱所受的震损最为严重,本次试验主要针对震后短柱进行研究,使用CFRP布对严重震损的短柱进行加固,并通过试验探究其加固后的承载力恢复情况。本文主要开展了以下几方面的工作:(1)通过查阅国内外相关研究的文献,介绍了CFRP布加固柱的相关理论分析以及试验研究现状,通过总结提出本文研究目的和意义。(2)设计制作了5个钢筋混凝土短柱,采用位移控制加载方式对其进行了拟静力试验,得到了5根短柱的震损现象及滞回曲线和骨架曲线。(3)对5个严重震损的钢筋混凝土短柱加固,试验参数为轴压比和CFRP布加固量。通过对修复后的短柱进行低周往复加载,研究经CFRP布加固后的钢筋混凝土短柱的抗震性能。(4)将试验所得数据进行处理并分析,绘出试件的水平荷载-位移滞回曲线、骨架曲线。分析不同参数情况下试验曲线的变化规律,并分析其延性、承载力、刚度等抗震性能。将修复前后的试验数据进行对比分析,研究其抗剪承载力恢复情况。(5)本文采用《混凝土结构加固设计规范》和《碳纤维片材加固混凝土结构技术规程》两规范中规定的计算公式,对加固后试件的承载力进行计算,将计算结果与实验结果进行比较分析。对本次试验数据进行整理并分析,CFRP布可以提高试件的承载力、延性等抗震性能,但对于重度震损的钢筋混凝土短柱仅通过CFRP布加固难以修复至其原有承载力。
[Abstract]:At present, many buildings have been affected by many factors, such as material aging, earthquake damage and so on. It is not reasonable or economical to push down and reconstruct reinforced concrete structures which have been damaged by earthquake. Therefore, it is possible to solve this problem by using appropriate technical means to reinforce and repair reinforced concrete structures. The short columns suffered the most serious earthquake damage in the earthquake. This test mainly focused on the short columns after the earthquake. CFRP cloth was used to strengthen the short columns with severe earthquake damage, and the recovery of the bearing capacity after the reinforcement was investigated through the test. The main work of this paper is as follows: (1) by referring to the relevant research literature at home and abroad, this paper introduces the relevant theoretical analysis and experimental research status of CFRP reinforced columns. Through summing up the purpose and significance of this paper. (2) five short reinforced concrete columns are designed and manufactured, and the quasi-static test is carried out by means of displacement-controlled loading. The seismic damage phenomenon, hysteretic curve and skeleton curve of five short columns are obtained. (3) the experimental parameters are axial compression ratio and CFRP reinforcement for five reinforced concrete short columns with severe earthquake damage. The seismic behavior of reinforced concrete short columns strengthened with CFRP sheets is studied by low-cycle reciprocating loading. (4) the horizontal load-displacement hysteretic curves and skeleton curves are drawn by processing and analyzing the experimental data. The variation law of test curve under different parameters is analyzed, and the seismic performance such as ductility, bearing capacity and stiffness are analyzed. Compare and analyze the test data before and after repair, (5) in this paper, the calculation formulas of concrete structural strengthening design code and CFRP reinforced concrete structure technical specification are used to calculate the bearing capacity of the strengthened specimens. The calculated results are compared with the experimental results. The data of this experiment can be sorted out and analyzed that CFRP cloth can improve the bearing capacity, ductility and seismic performance of the specimen, but it is difficult to repair the reinforced concrete short column with severe earthquake damage only by CFRP cloth reinforcement to its original bearing capacity.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU375.3;TU352.11

【参考文献】