双 T 梁在特种荷载作用下的性能研究

双T梁具有施工便利，养护检修方便等优点，近年来作为空心板梁的替代结构，越来越多地被运用到实际工程中。然而，目前的研究成果仅适应公路-I/II级和城-A/B级的荷载作用，但许多中小桥梁往往还要承担特种荷载的作用，因此，开展双T梁在特种荷载作用下的性能研究十分必要。依托上海某工程，采用有限元方法对标准双T梁结构在特种荷载作用下的使用性能进行验算，提出加强方案，并对加强方案进行验算、对比和分析，最终得到了一套完整的方案供相近桥梁结构设计与施工参考。

Study on Performance of Double-T Beam under Special Load

Double-T beam has the advantages of convenient construction, convenient maintenance and maintenance, etc., and has been used more and more in practical projects as an alternative structure for hollow plate beam in recent years. However, the current research results are only suitable for the load action of highway-I/II and city-A/B grade, but many small and medium-sized bridges often have to bear the reaction of special load. Therefore, it is necessary to carry out the performance study of double-T beam under special load. Relying on a project in Shanghai, the finite element method is used to verify the using performance of the standard double-T beam structure under the special load. A strengthening scheme is proposed, calculated, compared and analyzed. Finally, a complete set of scheme is obtained, which provides reference for the design and construction of similar bridge structures.