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本文采用有限元法对门式刚架—落地拱组合人行天桥的静、动力特性作了分析计算，并通过对昆明市东菊组合桥的静、动力特性实测对比，研究门式刚架—落地拱组合人行天桥在各种荷载作用下桥的受力特性及其固有频率和振型。研究成果表明：门式刚架—落地拱组合人行天桥具有受力性能好、刚度和稳定性较高的优点，适合于跨度较大的城市人行天桥。研究成果对人行天桥设计与施工质量检测有实际参考价值。
In this paper, the static and dynamic characteristics of the portal frame with composite rigid frame-arched composite footbridge are analyzed and calculated by using the finite element method. By comparing the static and dynamic characteristics of the composite bridge of the eastern chrysanthemum in Kunming, The mechanical behavior of bridge combined with natural frequency and vibration modes of composite pedestrian bridge under various loads. The research results show that the combined portal frame with the portal frame and the arched arch has the advantages of good stress performance, high rigidity and stability, and is suitable for the urban pedestrian bridge with larger span. The research results have practical reference value for the design and construction quality inspection of footbridge.