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基于《桥梁倒塌模式识别方法研究:理论分析》一文中极限设计理论的桥梁倒塌模式识别方法,以台湾省二重疏洪道独塔斜拉桥及香港汲水门双塔斜拉桥为例,识别桥梁倒塌模式。其结果采用非线性有限元法进行验证。计算结果表明,简化计算方法能正确识别导致桥梁部分或整体倒塌所必须包含的破坏点,桥梁极限承载力计算误差分别小于1.1%和1.3%。该简化计算方法计算精度高、运算速度快,可用来充分探讨桥梁倒塌机理、识别关键构件,为桥梁抗倒塌设计和加固提供科学依据。
Based on the ultimate design theory of bridge collapse pattern recognition method based on the “Bridge collapse pattern recognition method: theoretical analysis”, taking the Shuangzhong Flood Dodela Cable-stayed Bridge of Hong Kong and Hong Kong Kap Shui Mun double-tower cable-stayed bridge as an example, Bridge collapse mode. The result is verified by nonlinear finite element method. The calculation results show that the simplified calculation method can correctly identify the failure points that must be included in the partial or complete collapse of the bridge, and the calculation errors of the ultimate bearing capacity of the bridge are less than 1.1% and 1.3% respectively. The simplified calculation method has the advantages of high calculation precision and fast calculation speed, which can be used to fully explore the mechanism of bridge collapse and identify key components to provide a scientific basis for the anti-collapse design and reinforcement of the bridge.