TRAFFIC MODE AND IMPACT COEFFICIENTS OF HIGHWAY BRIDGES
TRAFFIC MODE AND IMPACT COEFFICIENTS OF HIGHWAY BRIDGES
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公路桥梁的交通模式及影响系数
DOI：
10.2208/jscej.1990.422_391
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
Junzo Inoue
中科院分区：
文献类型：
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作者：
K. Yokoyama;Junzo Inoue
在桥梁设计中，考虑了移动车辆对公路桥梁的动力响应，即用活荷载乘以冲击系数，冲击系数是活荷载跨度或荷载长度的函数。活荷载与冲击系数之间的关系不是独立于交通条件的，因为交通速度随交通量而变化，交通事故和交通信号往往会导致交通拥堵。本文通过蒙特卡罗模拟计算了不同交通方式下公路桥梁的静、动力响应，指出在桥梁跨度较大的情况下，交通拥堵模式的响应最大，忽略了冲击的影响。
Dynamic responses of highway bridges induced by moving vehicles are taken into consideration of impact in design of bridges, namely multiplying live loads by impact coefficient which is a function of span length or loading length of live load. Relationship between live load and impact coefficient is not independent of traffic condition, because traffic speed varies with traffic volume and traffic congestion often occurs due to traffic accidents and traffic signal. In this paper, static and dynamic responses of highway bridges corresponding various traffic modes are calculated by Monte Carlo simulation and it is clarified that the maximum response is given by traffic congestion mode in case of a bridge with a longer span, therefore, the effects of impact are ignored in such case.