摘要
以某通车运营的大型悬索桥为工程背景,建立桥梁热分析模型与有限元力学模型。通过热分析,模拟不同车辆火灾下大型悬索桥主要承重构件的温度变化过程。通过对小汽车、客车和货车火灾时对主缆的影响,分析桥梁主要承重构件的应力、挠度的变化情况,找出桥梁主要承重构件高温下力学性能退化规律。为大跨度悬索桥设计和安全运营提供技术依据。
Taking a large suspension bridge opened to traffic as the engineering background,the thermal analysis model&finite element mechanics model of the bridge are established.Through thermal analysis,the temperature change process of the main load-bearing components of the large suspension bridge under different vehicle fires is simulated.Through the influence of the fire of cars,passenger cars&trucks on the main cable,the stress&deflection changes of the main load-bearing components of the bridge are analyzed,and the degradation law of the mechanical properties of the main load-bearing components of the bridge under high temperature is found.It provides technical basis for the design&safe operation of large-span suspension bridges.
作者
廖鑫
余萌
LIAO Xin;YU Meng(China Municipal Engineering Central South Design&Research Institute Co.,Ltd.,Wuhan 430010,China)
出处
《中国市政工程》
2021年第2期30-34,123,共6页
China Municipal Engineering
关键词
大跨度悬索桥
承重构件
高温
力学性能
large-span suspension bridge
load-bearing member
high temperature
mechanical properties
