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增大截面加固法是加固钢筋混凝土结构常用而有效的方法,其中双面增大截面加固法在剪力墙结构加固工程中采用较多,但是会因为建筑立面、使用功能及施工条件的限制而无法使用,单面增大截面加固法往往可以解决以上问题.为探究单面增大截面法的加固性能,配合后期的实体模型试验研究,将实际工程普通一字型剪力墙按1∶3比例缩尺建立未加固剪力墙、双面增大截面加固剪力墙、单面增大截面加固剪力墙3组模型,采用大型有限元分析软件ABAQUS对3组剪力墙模型进行偏心受压静力仿真试验,对比研究其从弹性阶段到破坏全过程的破坏特征、应力应变规律及受压承载能力.仿真试验结果表明:单面和双面增大截面加固法均能大幅提高剪力墙的正截面承载能力(提高系数分别为2.8,3.5)、刚度、延性等受力性能,其中单面加固剪力墙的正截面承载力约为双面加固的77%,建议根据剪力墙加固工程实际条件进行选用.该结果可为合理地进行剪力墙的加固设计提供理论依据.
Increasing the cross-section reinforcement method is a commonly used and effective method to reinforce the reinforced concrete structure, of which two-sided increase the cross-section reinforcement method used in the shear wall structure reinforcement project more, but because of the building facade, the use of features and construction conditions But can not be used, the one-sided increase of section reinforcement method can often solve the above problems.In order to explore the reinforcement performance of single-section increase section method, with the later solid model test research, the actual engineering ordinary word shear wall 1: 3 scaled scale to build the un-strengthened shear wall, the double-sided reinforced shear wall, the single-sided reinforced shear wall reinforced with three sections model, the use of large finite element analysis software ABAQUS three groups of shear wall model eccentric Compressive static simulation test is carried out to compare the failure characteristics, stress-strain law and compressive load-carrying capacity of the whole process from elastic stage to failure.The simulation results show that both single-sided and double-sided reinforced sections can greatly improve the shear strength The positive cross-section bearing capacity of the force wall (improvement coefficient of 2.8, 3.5, respectively), stiffness, ductility and other mechanical properties, including the single-sided reinforced shear wall bearing capacity of about double the 77% It is suggested to choose according to the actual conditions of the shear wall reinforcement project.The results can provide a theoretical basis for the rational design of the reinforcement of the shear wall.