多点锚固预应力CFRP带加固T梁的有限元分析

发布时间：2018-03-20 20:40

本文选题：CFRP　切入点：预应力　出处：《重庆大学学报》2017年01期 　论文类型：期刊论文

【摘要】：采用非线性有限元分析程序ABAQUS对无粘结体外预应力CFRP片材加固简支钢筋混凝土T形梁后进行数值模拟,该模拟梁共4根分别为3根梁侧对称加固,1根为梁底加固均为四点波形齿锚固预应力CFRP带。对比结果显示,数据模拟与试验结果在构件屈服以前的承载力、变形以及极限承载力吻合程度较好,构件屈服以后的变形差别较大,因此,可在一定程度上有效替代试验分析方法。依据吻合程度最好的TL3参数设计了"两点锚固"和"四点锚固"的模型进行模拟分析。通过对锚固点数及加固量改变的对比分析可知,依据加固构件的弯矩改变各段加固量及布置锚固点数的方法既可以保证加固效果不降低,又可以节约CFRP材料。
[Abstract]:The numerical simulation of simply supported reinforced concrete T-shaped beams strengthened with unbonded externally prestressed CFRP sheet material was carried out by using nonlinear finite element analysis program ABAQUS. The simulated beam consists of 4 beams, 3 beams respectively, and 1 beam base reinforced with four wave teeth anchoring prestressed CFRP strip. The comparison results show that the bearing capacity of the simulation and test results is before the members yield. The deformation and ultimate bearing capacity are in good agreement with each other, and the deformation after yielding is quite different. The model of "two-point anchoring" and "four-point anchoring" is designed according to the TL3 parameters with the best degree of agreement. Through the comparative analysis of the number of anchoring points and the quantity of reinforcement, it can be seen that, According to the bending moment of the strengthened members, the method of changing the reinforcement quantity and arranging the anchoring points can not only ensure that the reinforcement effect will not be reduced, but also save the CFRP material.
【作者单位】：重庆科技学院建筑工程学院;重庆大学土木工程学院;
【基金】：国家自然科学基金面上资助项目(51078370) 中央高校基本科研业务费专项资金资助项目(310821161101) 重庆市教委科学技术研究项目(KJ1501309) 重庆科技学院校内科研基金资助项目(CK2016Z21)~~
【分类号】：U445.72

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