铁路桥梁正常使用极限状态可靠度校准研究

摘要

On the basis of the current allowable stress specification, preliminary limit state specification and the European specification, normal section crack resistance and bridge rigidity of one railway post-stressed simple supported T beam are calculated, and the reliabilities of serviceability limit state of the three specifications are compared with the safety stock sequence: Euro code> allowable stresses method code>limit state method code. Finally, some suggestions are put forward on the preliminary limit state specification.%分别以现行容许应力法规范、试行极限状态法规范和欧洲规范为依据，对某铁路工程预制后张法简支T梁的正截面抗裂性和桥梁刚度进行验算，从而对3种规范在正常使用极限状态下的可靠度进行比较，得出3种情况下的安全储备大小顺序：欧洲规范>现行容许应力法规范>试行极限状态法规范，并对试行极限状态法规范提出建议。