Reseach On Static Performance And Application Of Steel-Concrete Composite Continuous Curved Box Girder Bridge

Steel-concrete composite structure is a new structure of steel and concretecombined with to bear the force. Compared to the traditional bridges, composite bridgeshave the following advanced characteristics: lighter weight, fast construction,environmentally, less steel needed, bigger stiffness and higher driving comfort, whichdoes not affect traffic during the period of construction. In recent years, more and moresteel-concrete composite continuous curved box girder bridges are applied in urbanoverpass, city viaduct and some transportation hub engineering, which aroused peopleto research their mechanical behavior and engineering application. Therefore, researchfor a four-span steel-concrete composite continuous curved box girder bridge’s staticperformance has important practical significance.Based on review of the existing references and research work, this paper usesMidas/Civil2012simulate a four-span steel-concrete composite continuous curved boxgirder bridge, and focuses on the following contents:1On the basis of present research of composite beam, the computational andanalytical methods of the steel-concrete composite continuous curved box girder bridgeare summarized.2Compared with a straight beambridge of the same type and the same span, acurved bridge without setting pier eccentric of the same type, the same span, the sameradius of curvature and the real bridge respectively. The three bridge type in the effectof dead load is calculated in the structure of the support reaction force, displacement ofthe bridge deck and structural stress.3Calculate the real bridge in differentload combination conditionsof the deadload combined with long-term shrinkage and creep load effects, lane load, temperatureload and difference temperature load respectively. Study the structural reaction ofsupport reaction force, displacement of the bridge deck and structural stress, and made adetailed comparative analysis.4Summarize the problems that need attention in steel-concrete compositecontinuous beam bridge’s design and construction; analyze the difficulties of thepromotion and application and problems to be solved and put forward constructivesuggestions. The conclusions can be taken as references for the design and construction ofsteel-concrete composite continuous curved box girder bridge.