摘要
开展简支梁钢桥面铺装受力研究有助于解决正交异性钢桥面铺装早期损坏的问题,而多尺度模型能够精确地计算和反映各构件的受力情况,可为钢桥面铺装的设计和施工提供参考依据。文章建立了简支梁钢桥多尺度模型,对比分析了在不同的横隔板间距和不同的钢桥面板厚度情况下,铺装层内最大应力、应变的变化规律。结果表明:随着板厚增加,桥面铺装内应力、应变减小较多,横隔板间距减小对应力应变影响不大;铺装层内最大应力一般随铺装材料弹性模量增加而增加,最大应变随铺装材料弹性模量增加而减小,而当铺装材料弹性模量<1 500 MPa时,会使铺装层内各向最大应变急剧增加;增加桥面板厚度,优化钢箱梁的尺寸能够有效地减小钢桥面铺装的各向受力。
The research on the stress of steel bridge deck pavement is very important to solve problem of the early pavement damage. The multi-scale finite element model can calculate the force of mainly structures and provide reference to the design and construction. This paper establishes multi-scale finite element model for deck pavements of orthotropic steel bridge slabs. The work is to investigate the variation law of maximum stress and strain in pavement layer at the condition of different diaphragm spacing and steel bridge panel thickness. The results show that as the thickness of the slab increasing, the decreasing of stress and strain in the pavement of the bridge deck is small, and the effect of spacing of the diaphragm on strain and stress is not obvious. The maximum stress in the pavement layer generally increases with the increase in paving material modulus. When the pavement material modulus is less than 1 500 MPa, the maximum isotropic strain in the pavement layer increases dramatically. The forces in steel bridge pavement could be effectively reduced by bridge pavement increasing thickness and optimizing the size of steel box.
作者
宋君超
周艳
孟灵玥
李想
SONG Junchao;ZHOU Yan;MENG Lingyue(Jinan Yellow River Bridge Construction Group Co., Ltd., Jinan 250014,China;Shandong Provincial Key Laboratory of Road and Traffic Engineering in Colleges and Universities, Shandong Jianzhu University, Jinan 250101, China;Shandong Vocational College of Foreign Affairs Translation, Weihai 264506,China)
出处
《山东建筑大学学报》
2019年第3期23-28,共6页
Journal of Shandong Jianzhu University
基金
国家自然科学基金青年科学基金项目(51408339)
关键词
简支梁桥
多尺度模型
钢桥面铺装
最大应力应变
simply supported girder bridge
multi-scale finite element model
steel bridge pavement
maximum stress and strain
