FRP加固T形截面混凝土连续梁弯矩重分布的数值模拟  

T-Section Beams Strengthened with Fiber Reinforced Polymer

作　　者：田新 施鹏飞 丁双双 缪宏兵 镇斌[2] TIAN Xin;SHI Pengfei;DING Shuangshuang;MIAO Hongbing;ZHEN Bin(Nanjing founder Construction Engineering Quality Inspection Co.,Ltd.,Nanjing Jiangsu 210003,China;School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Rudong Hengyi Real Estate Development Co.,Ltd.,Rudong Jiangsu 226400,China;Rudong Jinheng City Investment Group Co.,Ltd.,Rudong Jiangsu 226400,China)

机构地区：[1]南京方正建设工程质量检测有限公司,江苏南京210003 [2]上海理工大学环境与建筑学院,上海200093 [3]如东恒一置业有限公司,江苏如东226400 [4]如东锦恒城市投资集团有限公司,江苏如东226400

出　　处：《工程质量》2022年第3期36-42,共7页Construction Quality

摘　　要：针对实际工程中纤维增强聚合物(FRP)加固钢筋混凝土连续梁的弯矩重分布情况,利用MATLAB软件建立T形截面混凝土连续梁的截面分析原理,采用刚度法对12根T形截面混凝土连续梁在支座与跨中处的弯矩重分布系数进行数值分析。结果表明:不同加固材料加固跨中处模拟得到的弯矩重分布系数随相对受压区高度的增大而减小;极限荷载下在跨中处和支座处模拟出的弯矩调幅系数随纤维布层数的增加而减小;以受压区高度为自变量的跨中处弯矩重分布系数与受压区高度线性相关。In order to study the moment redistribution of T-section concrete continuous beam strengthened with fiber-reinforced polymer(FRP),MATLAB software was used to program the moment-curvature relationship of T-section concrete continuous beam. The rigidity model was used to analyze the moment redistribution coefficient of twelve concrete continuous beams at the middle and support. The results show that the moment redistribution coefficient at the middle strengthened by different reinforcement materials decreases with the increase of relative depths of compression zone and the moment redistribution coefficient of continuous beam strengthened with FRP by the limit state at the middle and support decreases with the increase of the reinforcement;the depths of compression zone is linearly related to the simulated bending moment redistribution coefficient at the middle.

关 键 词：FRP T形截面 混凝土连续梁 弯矩重分布 截面分析模型 弯曲刚度法 

分 类 号：TU375.1[建筑科学—结构工程]