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结合常规拱桥的优点,根据钢和混凝土的组合优势,提出了一种新型的竖转钢箱-混凝土组合箱板拱桥。为验证箱板拱肋的钢箱和混凝土的共同工作能力及联结可靠性,对拱脚区段进行了模型试验,试验结果表明:二者能共同工作,联结可靠且变形协调。对试验模型进行了有限元分析和理论分析,并与试验结果进行了对比,吻合较好。最后针对该种组合截面提出了极限承载力计算公式。
Combined with the advantages of conventional arch bridge, a new type of vertical steel box-concrete composite box arch bridge is proposed according to the combined advantages of steel and concrete. In order to verify the common working ability and connection reliability of steel box and concrete with box arch ribs, the model test of arch section was conducted. The experimental results show that the two work together, the connection is reliable and the deformation is coordinated. The finite element analysis and theoretical analysis of the experimental model are carried out, and the results are compared with the experimental results, which is in good agreement. At last, the formula of ultimate bearing capacity is put forward for the combined section.