旧桥改造方案比选及主要构件合理利用

Scheme selection of the old bridge reconstruction and proper utilization of main members

结合具体旧桥改造工程概况，探讨了考虑旧桥主要构件合理利用的改造设计与方案比选，介绍了旧桥在新的设计方案下的结构验算、荷载试验评估，为同类型旧桥改造、评估及合理利用提供参考依据。

Combined with practical work of the old bridge reconstruction, it discusses the reconstruction design and scheme selection with considering of the utilization of main members, introduces the checked computation of the old bridge structure and loading test analysis in order to provide reference for similar works.