纤维布加固T形截面连续梁的弯矩重分布数值分析  

Numerical Analysis of Bending Moment Redistribution of T-section Continuous Beam Strengthened with Fiber Reinforced Polymer

作　　者：镇斌[1] 施鹏飞 王军洁 ZHEN Bin;SHI Pengfei;WANG Junjie(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Rudong Jinheng City Investment Group Co.,Ltd.,Rudong 226400,.China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]如东锦恒城市投资集团有限公司,江苏如东226400

出　　处：《徐州工程学院学报（自然科学版）》2019年第4期76-82,共7页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

摘　　要：为研究纤维布加固T形截面混凝土连续梁的弯矩重分布规律,运用MATLAB软件,对混凝土T形截面连续梁截面的弯矩-曲率关系进行编程计算,并采用弯曲刚度法对4根混凝土连续梁跨中和支座处的弯矩重分布系数情况进行分析.研究结果表明:跨中处的弯矩重分布系数随相对受压区高度的增大而减小;加固后的连续梁弯矩重分布系数随加固量的增加而增大,与未加固的连续梁的弯矩重分布系数反方向发展;模拟得到的弯矩重分布系数与试验得到的弯矩重分布系数比较吻合.In order to study the moment redistribution of T-section concrete continuous beam strengthened with fiber reinforced polymer,MATLAB software was used to program the moment-curvature relationship of T-section concrete continuous beam.The flexural rigidity model was used to analyze the moment redistribution coefficient of four concrete continuous beams at the middle and support.The results show that the moment redistribution coefficient at the middle decreases with the increase of relative depths of compression zone and the moment redistribution coefficient of continuous beam strengthened with FRP increases with the increase of the reinforcement,which is in the opposite direction of the moment redistribution coefficient of plastic continuous beam;the simulated bending moment redistribution coefficient is consistent with the experimental bending moment redistribution coefficient.

关 键 词：纤维布 T形截面 连续梁 弯矩重分布 分析模型 弯曲刚度法 

分 类 号：TU375.1[建筑科学—结构工程]