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| Experimental Research on the Load Carrying Performance of Steel—concre Junction in Box Girder of Cable--stayed Bridge |
| LIU Qiong1，HUANGCai—ping1，DANG Zhi—jie2，ZHAO Liang1 |
| 1．Huazhong University of Science and Technology，Wuhan，Hubei 430074，China；2．China Zhontie Major Bridge Engineering Group，Wuhan，Hubei 430034，China |
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Abstract Research purposes: The studies are done on the distribution and change law of stress and strain and the discussions are made on the load carrying mechanism at the junction between steel and concrete box girders in long span bridges to provide the theoretical and experimental bases for the practical designing and detailing such kind of bridges．A test model was designed and made for the steel—concrete junction of one cable—stayed bridge design，the static experiments and finite—element calculation with ANSYS program were carried out，and the experimental results were compared with the finite—element calculation results．
Research conclusions: The study and analysis of the loading bearing performance at the junction between steel and concrete box girders show if the design is reasonable and the structure treatment is appropriate，the rigidity transition between steel and concrete box girders is fairly smooth，the significant effects aye produced from the imposed prestress， and the nodal displacements of steel and concrete coincide。The experimental results verify the results from all test points coincide with the calculation values and the finite element analysis can well simulate the actual loading scenario and load carrying condition at the steel—concrete conjunction model．
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Received: 30 July 2009
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[2]科技基[2008]74号，客运专线铁路CRTS I型板式无砟 轨道混凝土轨道板暂行技术条件[S]．
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2009, Vol. 26 
