基于多尺度模型的简支梁钢桥面铺装受力研究
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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.
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.
引文
[1] 李兴海,钱振东,周绪利,等.钢桥面铺装修复界面疲劳特性试验[J].中国公路学报,2018,31(5):99-105.
[2] 王健,毕玉峰,张宏超.杭州湾跨海大桥水泥混凝土桥梁桥面铺装车辙病害分析与预估[J].公路工程,2018,43(2):229-233.
[3] 柳富勇.基于重载条件的钢桥面铺装层疲劳性能研究[D].南京:南京林业大学,2017.
[4] 周跃.铺装层对正交异性板疲劳性能的影响研究[D].西安:长安大学,2015.
[5] 王占飞,程浩波,程志彬,等.桥面铺装对正交异性钢桥面板疲劳性能的影响[J].沈阳建筑大学学报(自然科学版),2018,34(2):257-266.
[6] 苏庆田,吴冲,董冰.斜拉桥扁平钢箱梁的有限混合单元法分析[J].同济大学学报(自然科学版),2005,33(6):742-746.
[7] 苏庆田,吴永昌,曾明根,等.珠江黄埔大桥北汊桥扁平钢箱梁受力特性研究[J].公路,2009,10(10):305-308.
[8] Yang Y.Multi-scale modelling of long-span bridges for health assessment in structural health monitoring[D].Hong Kong:The Hong Kong Polytechnic University,2012.
[9] Wang F Y,Xu Y L,Qu W L.Mixed-dimensional finite element coupling for structural multi-scale simulation[J].Finite Elements in Analysis and Design ,2014,92:12-25
[10] 罗振东.混合有限元法基础及其应用[M].北京:科学出版社,2006.
[11] 李兆霞.大型土木结构多尺度损伤预后的现状、研究思路与前景[J].东南大学学报(自然科学版),2013,43(5):1111-1121.
[12] 聂建国,周萌,姬同庚,等.基于多尺度模型的自锚式钢箱梁悬索桥主缆锚固区受力性能研究[J].土木工程学报,2014,47(6):57-69.
[13] 钟儒勉,宗周红,秦中远,等.基于多尺度模型修正的结合梁斜拉桥损伤识别方法[J].东南大学学报(自然科学版),2014,44(2):350-356.
[14] 陈国红,张启伟.斜拉桥钢锚箱式索梁锚固结构的有限混合单元法分析[J].中外公路,2009,29(2):123-125.
[15] 刘琦齐.斜拉桥多尺度模型修正及模型确认方法研究[D].南京:东南大学,2017.
[16] 苏庆田,张其林,混合有限元法分析带纵肋钢箱构件的受力[J].工程力学,2006,23(10):163-167.
[2] 王健,毕玉峰,张宏超.杭州湾跨海大桥水泥混凝土桥梁桥面铺装车辙病害分析与预估[J].公路工程,2018,43(2):229-233.
[3] 柳富勇.基于重载条件的钢桥面铺装层疲劳性能研究[D].南京:南京林业大学,2017.
[4] 周跃.铺装层对正交异性板疲劳性能的影响研究[D].西安:长安大学,2015.
[5] 王占飞,程浩波,程志彬,等.桥面铺装对正交异性钢桥面板疲劳性能的影响[J].沈阳建筑大学学报(自然科学版),2018,34(2):257-266.
[6] 苏庆田,吴冲,董冰.斜拉桥扁平钢箱梁的有限混合单元法分析[J].同济大学学报(自然科学版),2005,33(6):742-746.
[7] 苏庆田,吴永昌,曾明根,等.珠江黄埔大桥北汊桥扁平钢箱梁受力特性研究[J].公路,2009,10(10):305-308.
[8] Yang Y.Multi-scale modelling of long-span bridges for health assessment in structural health monitoring[D].Hong Kong:The Hong Kong Polytechnic University,2012.
[9] Wang F Y,Xu Y L,Qu W L.Mixed-dimensional finite element coupling for structural multi-scale simulation[J].Finite Elements in Analysis and Design ,2014,92:12-25
[10] 罗振东.混合有限元法基础及其应用[M].北京:科学出版社,2006.
[11] 李兆霞.大型土木结构多尺度损伤预后的现状、研究思路与前景[J].东南大学学报(自然科学版),2013,43(5):1111-1121.
[12] 聂建国,周萌,姬同庚,等.基于多尺度模型的自锚式钢箱梁悬索桥主缆锚固区受力性能研究[J].土木工程学报,2014,47(6):57-69.
[13] 钟儒勉,宗周红,秦中远,等.基于多尺度模型修正的结合梁斜拉桥损伤识别方法[J].东南大学学报(自然科学版),2014,44(2):350-356.
[14] 陈国红,张启伟.斜拉桥钢锚箱式索梁锚固结构的有限混合单元法分析[J].中外公路,2009,29(2):123-125.
[15] 刘琦齐.斜拉桥多尺度模型修正及模型确认方法研究[D].南京:东南大学,2017.
[16] 苏庆田,张其林,混合有限元法分析带纵肋钢箱构件的受力[J].工程力学,2006,23(10):163-167.