基于ABAQUS的CFRP布加固部分预应力混凝土梁数值模拟  

Numerical simulation of PPC beams reinforced by CFRP sheets based on ABAQUS

作　　者：胡霖嵩 鞠培东 张晶晶 Hu Lin-song;Ju Pei-dong;Zhang Jing-jing(Hebei University of Technology,Tianjin 300401,China;Tobacco Research Institute of Chinese Academy of Agricultural Sciences,Qingdao 266101,China;Department of Architecture and Civil Engineering of North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]河北工业大学,天津300401 [2]中国农业科学院烟草研究所,山东青岛266101 [3]北华航天工业学院建筑工程系,河北廊坊065000

出　　处：《工程抗震与加固改造》2019年第2期67-72,79,共7页Earthquake Resistant Engineering and Retrofitting

摘　　要：为研究碳纤维增强复合材料(CFRP)加固部分预应力混凝土(PPC)梁的力学性能,本文对两根由实际桥梁缩尺得到的未加固试验梁进行静力试验,同时利用有限元分析软件ABAQUS建立有限元模型。将模拟结果与实验结果对比,验证模型的准确性。以此模型为基础建立CFRP布加固梁模型,研究CFRP布加固梁的力学性能。模拟结果表明,加固梁承载力提高20%,延性下降17.23%。加固梁下部混凝土受力趋于均匀,裂缝分布均匀且开展程度减小。CFRP布承担更多荷载,使预应力钢筋和普通钢筋受力重分布。In order to study the mechanical properties of PPC beams strengthened with CFRP sheets,the static tests are carried out on two unreinforced beams reduced scale from real beams,and the finite element analysis software ABAQUS is used to establish the finite element model.The simulation results are compared with the experimental results to verify the accuracy of the model.The model of the reinforced beams is established based on former model to study mechanical properties.The simulation results show that the bearing capacity increases 20%and the ductility decreases.17.23%.The stress of lower part concrete is uniform,and the concrete cracks are limited and its distribution is uniform.CFRP sheets bear more stress and the stress of prestressed rebars and common rebars are redistribution.

关 键 词：静力试验 CFRP布加固 ABAQUS 承载力提高 延性下降 

分 类 号：TU378.2[建筑科学—结构工程]