摘要
本文结合12根钢筋混凝土梁的超载试验,主要针对不同的预加荷载幅值和不同超载次数对不同配筋率的钢筋混凝土桥梁受弯承载力性能的影响进行研究,分析超载对钢筋混凝土梁桥受弯性能的影响规律。试验结果表明超载对桥梁构件承载力降低作用不显著,但是超载作用后的桥梁构件裂缝和挠度明显增大,从而导致正常使用性能降低,后期失效风险增大。
Based on the experiments of 12 reinforced concrete beams,the influence of truck overloads on highway bridge members[BF]'[BFQ]s flexural performance is evaluated.With the value and the number of times of overloading and the percentage of reinforcement as the main parameters,the damages caused by the overloads are studied.The test results generally indicate that the truck overloads on the bridge members do not cause dramatical strength decrease,but the increases in crack width and deflection of the beams are not neglectable.In this sense,the risk of failure of existing bridges under overloads is increased,and the serviceability degraded.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第6期35-40,共6页
China Civil Engineering Journal
基金
辽宁交通科技重点项目(0101)
关键词
超载
钢筋混凝土
梁桥
受弯性能
overloads
reinforced concrete
bridge
flexural performance
