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进行了波形钢腹板钢管混凝土模型拱的面内两点非对称和对称加载试验。对模型拱的挠度、钢管应变、波形钢腹板应变、极限承载力等进行了分析。试验结果表明:波形钢腹板钢管混凝土拱是一种受力性能很好的新型组合拱。在这种结构中,波形钢腹板与钢管混凝土弦杆均能发挥其各自的优势。它与钢管混凝土单圆管和哑铃形拱相比,刚度与承载力有了很大提高;与钢管混凝土桁拱相比,避开了节点破坏问题,模型拱呈总体破坏特征,从而使其延性与极限承载力明显提高。有限元分析表明:在承载力分析中应考虑双重非线性的影响。极限承载力简化计算不能采用钢筋混凝土拱的极限状态法,而可以采用钢管混凝土单圆管和哑铃形拱中的等效梁柱法。
In-plane two-point asymmetric and symmetric loading tests were carried out on the CFST arch of corrugated steel webs. The deflection of the model arch, the strain of the steel pipe, the strain of the corrugated steel web and the ultimate bearing capacity were analyzed. The test results show that the corrugated steel web CFST arch is a new type of combined arch with good mechanical properties. In this structure, both the corrugated steel web and the concrete-filled steel tube chord play their respective advantages. Compared with the CFST truss arch, it avoids the problem of node failure, and the model arch shows a general failure characteristic, so that the ductility With the ultimate bearing capacity increased significantly. Finite element analysis shows that the influence of double nonlinearity should be considered in the analysis of bearing capacity. The simplified calculation of ultimate bearing capacity can not adopt the limit state method of reinforced concrete arch, but the equivalent beam-column method in single-pipe concrete pipe and dumbbell-shaped arch can be adopted.