连续刚构桥结构验算及主梁开裂分析

早期连续刚构桥设计中由于认识不足导致桥梁运营中主梁产生大量裂缝,严重影响连续刚构桥的使用和结构安全,为了降低这种不利影响,本文结合实际工程,分别参照《85规范》和《04规范》对连续刚构桥进行结构验算,将计算结果进行对比分析,研究主梁腹板与顶底板开裂原因,并与实际开裂调查进行对比验证,得出相关结论并提出有效的加固建议,为日后的施工和设计提供参考.

THE STRUCTURE CALCULATION OF CONTINUOUS RIGID FRAME BRIDGE AND THE CRACKING ANALYSIS OF MAIN GIRDER

Continuous rigid frame bridge produced a large number of cracks while it is in the opera- tion earlier. It makes a serious influence on using and structure safety of long span continuous rigid frame. In order to reduce the adverse impact, this paper combines with practical engineering to check and calculate the results of the structure of continuous rigid frame bridge according to the norm of the ＂guidelines for 85＂ and the ＂guidelines for 04＂. Comparing and analyzing the results ,we find the crack- ing reasons of web and floor web. Compared with the actual crack investigation to verify, it makes a con- clusion about the proposals for strengthening. This conclusion provides reference for future design and construction.