钢丝网水泥砂浆加固RC梁高温后承载力计算  

Calculation of bearing capacity of RC beam reinforced by ferrocement after high temperature

作　　者：苗生龙[1] 袁广林 李庆涛 成林燕 MIAO Shenglong;YUAN Guanglin;LI Qingtao;CHENG Linyan(Xuhai College,China University of Mining and Technology,Xuzhou 221008,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;Jincheng Coal Planning and Design Institute,Jincheng 048000,China)

机构地区：[1]中国矿业大学徐海学院,江苏徐州221008 [2]中国矿业大学力学与土木工程学院,江苏徐州221116 [3]晋城市煤炭规划设计院,山西晋城048000

出　　处：《混凝土》2018年第10期40-42,46,共4页Concrete

基　　金：国家自然科学基金项目(51208504);江苏省高等学校自然科学研究项目资助(17KJB560014)

摘　　要：钢丝网水泥砂浆加固法是常用的结构加固方法之一。参考混凝土、钢筋及钢丝网高温后的性能退化规律,结合ANSYS有限元软件模拟得到的梁截面温度场,根据钢丝网水泥砂浆加固RC梁常温下承载力的计算方法,给出了钢丝网水泥砂浆加固RC梁高温后承载力的计算方法,并将该方法计算结果与试验结果进行了比较。结果表明,该钢丝网水泥砂浆加固RC梁高温后承载力的计算方法较为安全,可供实际工程参考。同时,在450℃以下时,采用钢丝网水泥砂浆对RC梁进行加固效果良好。The steel wire mesh and cement mortar reinforcement method is one of the common reinforcement methods.Considering the performance degradation law of concrete,steel bar and wire mesh after high temperature,the temperature field of beam section analyzed by ANSYS and the calculation method of bearing capacity of RC beam reinforced by ferrocement at room temperature,the calculation method of bearing capacity of RC beam reinforced by ferrocement after high temperature was given.The calculated results were compared with the experimental results.The results show that the calculation method given in this paper is conservative,and can be used as a reference for actual engineering.The effect of reinforcement is excellent while the temperature is below 450℃.

关 键 词：钢丝网 水泥砂浆 RC梁 高温 承载力 

分 类 号：TU528.01[建筑科学—建筑技术科学]