摘要
大跨度斜拉桥由于具有刚度大、噪声小、成本低、维修养护方便等特点,在高速铁路上得到了一定的应用。目前中国建设的几条客运专线桥梁普遍采用中小跨,但是将来一些特殊地段修建高速铁路时须采用斜拉桥,高速列车对桥梁结构的动力作用远大于普通铁路桥梁,桥梁出现较大的挠度会直接影响桥上轨道的平顺性,造成结构物承受很大的冲击力。在斜拉桥计算分析中应对冲击系数、抗震、抗风、结构计算图式、列车安全性和舒适性等方面引起注意,从而使计算分析的斜拉桥的物理、力学性能及结构可靠度满足高速铁路列车运行安全和乘客舒适的要求。
Large span cable-stayed bridge has advantages of stiffness, low noise, low cost, easy repair and easy maintenance, so there are certain applications on high-speed rail. China＇s commonly used construction structure is small and medium-sized passenger railway bridge cross, but in the future some specific high-speed rails require the use of cable-stayed bridge. The pow er of high-speed train on the bridge structure is much larger than that on the the ordinary railway bridge. Bridge＇s larger deflec tion will directly affect the ride of the bridge rail, causing the structure to withstand great impact. So the impact factor, earthquake, wind, structural calculation schema, train security and comfort should be paid attention to let the calculation and analysis of the cable-stayed bridge＇s physical and mechanical properties and reliability meet the requirements of safety and com fort.
出处
《河北工业科技》
CAS
2012年第6期388-390,共3页
Hebei Journal of Industrial Science and Technology
关键词
高速
斜拉桥
冲击系数
地震频率
涡振
脱轨系数
制振
high-speed cable-stayed bridge
impact coefficient
earthquake frequency
eddy vibration damping derailment
coef-ficient
