复合砂浆钢筋网加固抗弯RC梁的非线性分析  

NONLINEAR FEM ANALYSIS OF RC BEAM STRENGTHENED WITH FERROCEMENT MORTAR

作　　者：卜良桃[1] 王月红[1] 尚守平[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程力学》2006年第9期125-130,共6页Engineering Mechanics

基　　金：湖南省科技厅科技重点项目(05SK2010);湖南省交通厅科技项目--高性能复合砂浆钢筋网加固混凝土构件研究(200514)

摘　　要：复合砂浆钢筋网薄层加固是一种有效的加固方法,能够显著地提高钢筋混凝土梁的抗弯承载力、变形能力以及抗裂性能。以8根复合砂浆钢筋网加固RC梁的试验研究结果为参考,通过非线性有限元分析广泛地研究了加固梁纵向配筋率、配箍特征值、梁高宽比对极限荷载提高幅度的影响,并初步分析了少筋梁和超筋梁加固后的荷载-跨中挠度曲线的变化规律。根据分析和试验结果,通过等效假定给出了复合砂浆钢筋网加固RC梁的极限承载力计算公式和抗弯刚度计算公式。Ferrocement motar technology is an efficient method to reinforce RC beam. It can significantly increase the load-bearing capacity, deflection capacity and crack-resisting behavior. Based on experimental researches of eight RC beams strengthened with ferrocement motar a finite element method is employed to analyze the influence of tension reinforcement ratio, stirrup characteristic value and height-width ratio on the incremental amplitude of ultimate load. The rule of load-deflection curves of trader-reinforced and over-reinforced beam is initially investigated. A computational expression of load-bearing capacity and flexural rigidity of RC beam strengthened with ferrocement motar is proposed based on the experimental and analytical results.

关 键 词：结构工程 加固 非线性分析 复合砂浆 钢丝网 钢筋混凝土梁 

分 类 号：TU317[建筑科学—结构工程] TU376