桥上Ⅲ型板式无砟轨道纵向力计算模型简化
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摘要
为简化大跨连续梁桥上CRTSⅢ型板式无砟轨道无缝线路纵向力计算模型,基于原有计算模型、连续梁桥受力特点及梁-板-轨相互作用原理提出简化的等截面计算模型,并将新的模型与原变截面模型分别在伸缩力、制动力及挠曲力工况下的计算结果进行对比分析.结果表明:简化模型与原模型在伸缩力和制动力工况下各结构纵向力与位移变化趋势基本一致,计算结果误差均不到1%,满足工程需要;简化模型与原模型挠曲力工况下计算结果相差很大,挠曲力工况下须根据连续梁实际截面参数进行建模计算;各轨道及桥梁结构挠曲受力与变形均很小且一般不作为设计检算指标.提出的简化模型其建模速度和计算效率可提高20%～40%.
In order to simplify the longitudinal force calculation model of CRTSⅢ slab track continuous welded rail(CWR) on long-span continuous beam bridge,a new calculation model based on the original model,and mechanical properties of continuous beam bridge and beam-slab-rail interaction was put forward.The simplified constant section model and the original variable cross-section model were compared and analyzed under the conditions of expansion-contraction force,deflection force and braking force.Research results show that the simplified model and the original model are basically consistent with the longitudinal force and longitudinal displacement trends of structure under the conditions of expansion-contraction force and braking force,and the calculation results error is less than 1%,which can meet engineering needs.The simplified model and the original model deflection force calculation results are very different,and modeling calculation should be carried on based on continuous beam design section parameters under flexural conditions.The deflection force and deformation of track and bridge structure are small,which could not be used as design verification indicators generally.The proposed simplified model can improve modeling speed and computational efficiency by 20%～40%.
In order to simplify the longitudinal force calculation model of CRTSⅢ slab track continuous welded rail(CWR) on long-span continuous beam bridge,a new calculation model based on the original model,and mechanical properties of continuous beam bridge and beam-slab-rail interaction was put forward.The simplified constant section model and the original variable cross-section model were compared and analyzed under the conditions of expansion-contraction force,deflection force and braking force.Research results show that the simplified model and the original model are basically consistent with the longitudinal force and longitudinal displacement trends of structure under the conditions of expansion-contraction force and braking force,and the calculation results error is less than 1%,which can meet engineering needs.The simplified model and the original model deflection force calculation results are very different,and modeling calculation should be carried on based on continuous beam design section parameters under flexural conditions.The deflection force and deformation of track and bridge structure are small,which could not be used as design verification indicators generally.The proposed simplified model can improve modeling speed and computational efficiency by 20%～40%.
引文
[1]蔡小培,赵磊,高亮,等.CRTSⅢ型板式无砟轨道底座合理纵连长度计算[J].交通运输工程学报,2016,16(1):55-62.
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[3]张鹏飞,桂昊,雷晓燕,等.列车荷载下桥上CRTSⅢ型板式无砟轨道挠曲力与位移[J].交通运输工程学报,2018,18(6):61-72.
[4]张鹏飞,桂昊,高亮,等.桥上CRTSⅢ型板式无砟轨道无缝线路伸缩力影响因素分析[J].北京交通大学学报,2018,42(6):15-23.
[5]张鹏飞.复杂荷载条件下桥上CRTSⅡ型板式无砟轨道无缝线路纵向力研究[D].北京:北京交通大学图书馆,2018.
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[7]吴青松,任娟娟,刘学毅,等.用于铺设Ⅱ型板式轨道的大跨连续梁桥合理温度跨度研究[J].铁道科学与工程学报,2016,13(3):414-422.
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[9]谢铠泽,王平,徐浩,等.刚构桥上无砟轨道无缝线路病害研究[J].中南大学学报(自然科学版),2014,45(6):2085-2091.
[10]谢铠泽,王平,徐井芒,等.桥上单元板式无砟轨道无缝线路的适应性[J].西南交通大学学报,2014,49(4):649-655.
[11]DAI Gonglian,LIU Wenshuo.Applicability of small resistance fastener on long-span continuous bridges of high-speed railway[J].Journal of Central South University,2013,20(5):1426-1433.
[12]SUN Weilong,HAN Feng.Research on CWR design on steel-concrete composite beam bridge in alpine region[J].Applied Mechanics and Materials,2014,587-589:1708-1712.
[13]中华人民共和国铁道部.TB10015-2012铁路无缝线路设计规范[S].北京:中国铁道出版社,2013.
[14]曲村,高亮,乔神路.高速铁路长大桥梁CRTSⅠ型板式无砟轨道无缝线路力学特性分析[J].铁道标准设计,2011(4):12-16.
[15]国家铁路局.TB10082-2017铁路轨道设计规范[S].北京:中国铁道出版社,2017.
[2]王璞,高亮,赵磊,等.路基地段CRTSⅢ型板式无砟轨道底座板限位凹槽设置方式研究[J].工程力学,2014,31(2):110-116.
[3]张鹏飞,桂昊,雷晓燕,等.列车荷载下桥上CRTSⅢ型板式无砟轨道挠曲力与位移[J].交通运输工程学报,2018,18(6):61-72.
[4]张鹏飞,桂昊,高亮,等.桥上CRTSⅢ型板式无砟轨道无缝线路伸缩力影响因素分析[J].北京交通大学学报,2018,42(6):15-23.
[5]张鹏飞.复杂荷载条件下桥上CRTSⅡ型板式无砟轨道无缝线路纵向力研究[D].北京:北京交通大学图书馆,2018.
[6]曲村.高速铁路长大桥梁无砟轨道无缝线路设计理论及方法研究[D].北京:北京交通大学图书馆,2013:72-79.
[7]吴青松,任娟娟,刘学毅,等.用于铺设Ⅱ型板式轨道的大跨连续梁桥合理温度跨度研究[J].铁道科学与工程学报,2016,13(3):414-422.
[8]王平,谢铠泽.连续刚构桥上无缝线路计算模型及方法的简化[J].中南大学学报(自然科学版),2015,46(7):2735-2743.
[9]谢铠泽,王平,徐浩,等.刚构桥上无砟轨道无缝线路病害研究[J].中南大学学报(自然科学版),2014,45(6):2085-2091.
[10]谢铠泽,王平,徐井芒,等.桥上单元板式无砟轨道无缝线路的适应性[J].西南交通大学学报,2014,49(4):649-655.
[11]DAI Gonglian,LIU Wenshuo.Applicability of small resistance fastener on long-span continuous bridges of high-speed railway[J].Journal of Central South University,2013,20(5):1426-1433.
[12]SUN Weilong,HAN Feng.Research on CWR design on steel-concrete composite beam bridge in alpine region[J].Applied Mechanics and Materials,2014,587-589:1708-1712.
[13]中华人民共和国铁道部.TB10015-2012铁路无缝线路设计规范[S].北京:中国铁道出版社,2013.
[14]曲村,高亮,乔神路.高速铁路长大桥梁CRTSⅠ型板式无砟轨道无缝线路力学特性分析[J].铁道标准设计,2011(4):12-16.
[15]国家铁路局.TB10082-2017铁路轨道设计规范[S].北京:中国铁道出版社,2017.
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