新型双工字钢板组合梁结构冲击系数  

Impact Factors for New Double I-Steel Plate Composite Beams

作　　者：王子浩 杨洋 WANG Zihao;YANG Yang(School of Civil Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Anhui Transportation Holding Group,Hefei 230088,China)

机构地区：[1]浙江工业大学土木工程学院,杭州310014 [2]安徽省交通控股集团有限公司,合肥230088

出　　处：《科技和产业》2025年第5期100-107,共8页Science Technology and Industry

基　　金：重载交通下曲线梁桥性能化抗倾覆设计理论基金(52278227)。

摘　　要：以寿春淮河特大桥堤外引桥中跨径为4×35 m的双工字钢-混凝土组合梁桥为例,采用动力有限元模型进行数值模拟。结果显示:钢梁的冲击系数随车速增加先升高后降低,在60 km/h达到最大值;而桥面板的冲击系数则随车速增加而持续上升,在120 km/h时超过规范局部冲击系数设计值的91.67%;钢主梁和桥面板的冲击系数都会随着车辆重量的增加而降低。明确了冲击系数随车速和车重变化的具体趋势,揭示了现有桥梁设计规范在准确描述车辆荷载实际动力响应方面的局限性,强调了在桥梁设计和评估中考虑局部动力效应的重要性。The finite-element model was used to simulate the double I-steel and concrete composite beam bridge with a span of 4×35 meters in the approach bridge outside the dike of Shouchun Huaihe River Bridge.The results indicate that the impact factor of the steel beam increases with speed and then decreases,reaching a maximum at 60 km/h.In contrast,the impact factor of the bridge deck continues to rise with speed,exceeding the design value of the standard local impact factor by 91.67%at 120 km/h.Both the steel main beam and the bridge deck’s impact factors decrease with the increase in vehicle weight.Specific trends in the variation of impact coefficients with vehicle speed and weight are identified,the limitations of existing bridge design codes in accurately describing the actual dynamic response to vehicle loading is revealed,the importance of considering local dynamic effects in bridge design and evaluation is emphasized.

关 键 词：钢板组合梁桥 有限元模拟 动载试验 冲击系数 参数分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]