铝合金天桥设计控制因素研究

Research on Controlling Factors in Design of Aluminium Alloy Footbridge

摘要:

根据《铝合金人行天桥技术规程》（T/CECS 471—2017）的相关规定，分析了铝合金人行天桥设计的控制因素。结果表明：桁架铝合金人行天桥结构设计的控制关键是结构基频而非挠度；如果结构主要为受弯构件，则铝合金人行天桥设计的首要控制因素为变形；铝合金桁架人行天桥的矢跨比约为1∶10；对铝合金材料特性及对桥梁设计中关键因素的把控，将提升铝合金材料的使用效率，降低建造成本；铝合金人行天桥具有良好的跨越能力，可以适应跨越较宽道路的功能需求。

Abstract:

According to the relevant regulations of Technical Regulations for Aluminum alloy Footbridge (T/CECS471-2017), the control factors in the design of aluminum alloy footbridge are analyzed. The results show that the key to control the structural design of the truss aluminum alloy footbridge is the structural fundamental frequency rather than the deflection. If the structure is mainly a flexural member, the primary control factor in the design of aluminum alloy footbridge is the deformation. The rise span ratio of aluminum alloy truss footbridge is about 1:10. The characteristics of aluminum alloy materials and the control of key factors in bridge design will improve the use efficiency of aluminum alloy materials and reduce the construction costs. The aluminum alloy footbridge has the good spanning capability and can adapt to the functional demands of spanning the wider roads.