钢丝网水泥砂浆加固混凝土梁高温后的抗弯性能  

EXPERIMENTAL RESEARCH ON FLEXURAL PERFORMANCE OF FERROCEMENT REINFORCED RC BEAMS AFTER HIGH TEMPERATURE

作　　者：袁广林[1] 许小燕[1] 张先扬[1] 成林燕 

机构地区：[1]中国矿业大学建筑工程学院,江苏徐州221008 [2]晋城煤炭设计室,山西晋城048000

出　　处：《工业建筑》2009年第7期70-73,共4页Industrial Construction

基　　金：国家自然科学基金资助项目(50478100)

摘　　要：对钢丝网水泥砂浆加固钢筋混凝土梁高温后抗弯性能进行试验,研究受热温度对钢丝网水泥砂浆加固钢筋混凝土梁高温后抗弯性能的影响规律。研究结果表明:采用钢丝网水泥砂浆加固法能有效提高梁的抗弯刚度,减少跨中挠度;随着受热温度的升高,钢丝网水泥砂浆加固梁的承载力有一定程度的降低,当受热温度在450℃以下时,加固梁承载力的降低不超过5%。也即采用钢丝网水泥砂浆加固混凝土梁具有良好的抗火能力。Flexural performance of RC beams reinforced by ferrocement was tested after different high temperature, and the influence law of the high temperature on flexural performance was analyzed. The results indicated that the reinforcement method of ferrocement could increase flexural rigidity of RC Beams, and it could decrease the deflection of midspan. The bearing capacity of reinforced RC beam decreased to some extent with the increasing of heating temperature; while the temperature was below 450 ℃ , the bearing capacity of reinforced RC beams decreased by less than 5 % . It indicated that RC beams reinforced by ferrocement had web flameresistant capacity.

关 键 词：钢丝网 水泥砂浆 加固 混凝土梁 高温 抗弯性能 

分 类 号：TU375[建筑科学—结构工程] TU375.1