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考虑初应力的哑铃型钢管混凝土拱肋极限承载力统一解

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Keywords: 桥梁工程,钢管混凝土拱肋,统一强度理论,极限承载力,初应力

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Abstract:

？为了研究钢管初应力对钢管混凝土拱肋极限承载力的影响,针对实际工程中普遍采用的哑铃型钢管混凝土拱肋,考虑中间主应力、材料拉压比、初应力、初始缺陷、矢跨比和长细比等因素的影响,采用统一强度理论和修正的等效梁柱法,推导出一个新的初应力影响系数的计算公式,并建立其极限承载力的统一解。应用提出的计算公式分别对有、无初应力的哑铃型钢管混凝土拱肋的极限承载力进行计算,并将无初应力拱肋的计算结果与相关文献的试验结果及计算结果进行对比。分析结果表明:所提出的计算公式具有较好的精确度,验证了该计算方法的可行性|研究结果可为工程应用提供参考。

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