钢筋混凝土柱增大截面加固的模拟分析  

Simulative Analysis of Reinforcement of Reinforced Concrete Columns With Increased Section

作　　者：黄林青[1] 秦凌凌 廖新雪 龚世豪 张京街[3] HUANG Linqing;QIN Lingling;LIAO Xinxue;GONG Shihao;ZHANG Jingjie(College of Architecture Engineering,Chongqing University of Science&Technology,Chongqing 401331,China;Engineering Testing Center,Chongqing CMCU Testing Technology Co.Ltd.,Chongqing 400026,China;Chongqing Construction Science Research Institute,Chongqing 400015,China)

机构地区：[1]重庆科技学院建筑工程学院,重庆401331 [2]重庆中机中联检测技术有限公司工程检测中心,重庆400026 [3]重庆市建筑科学研究院,重庆400015

出　　处：《重庆科技学院学报（自然科学版）》2019年第5期87-91,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：重庆市建设科技计划项目“基于摩-剪模型的竖向混凝土构件被动加大截面的受力性能研究”(城科字2015第(1-40)号)

摘　　要：针对增大截面加固法,通过模拟试验,研究比较加固因素对加固后钢筋混凝土柱极限承载力的影响程度。利用ABAQUS建立加固钢筋混凝土柱的有限元计算模型,通过Design Expert软件中的Box-Behnken设计模拟试验,并将模拟结果与理论计算结果进行比较分析。结果表明:模拟结果与理论计算结果基本一致,有限元模拟试验结果可靠;在假定钢筋混凝土柱充分卸载的情况下,加固后柱子的极限承载力与新增混凝土的强度、截面厚度和纵向钢筋配筋率均成正相关关系,其中,截面厚度的影响程度最大,配筋率的影响程度最小,混凝土强度的影响程度居中。Aiming at the structure member strengthening with increasing section area,the influence of strengthening factors on the ultimate bearing capacity of reinforced concrete column after strengthening is studied and compared through simulation test.The finite element calculation model of strengthening concrete column by ABAQUS is established.The simulation test is designed by Box-Behnken in Design Expert software,and the simulation results are compared with the theoretical results.The results show that the simulation results are basically consistent with the theoretical calculation results,and the finite element simulation test results are reliable.Under the assumption that the reinforced concrete column is fully unloaded,the ultimate bearing capacity of the reinforced concrete column is positively correlated with the strength of the new concrete,the thickness of the section and the longitudinal reinforcement ratio,in which the influence degree of thickness of the section is the greatest,the influence degree of reinforcement ratio is the smallest,and the influence degree of concrete strength is in the middle.

关 键 词：钢筋混凝土柱 增大截面加固法 有限元分析 响应面方法 

分 类 号：TU375.3[建筑科学—结构工程]