公铁两用桥双层结合全焊钢桁梁预压试验研究
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摘要
以跨径为80 m的某海峡公铁两用桥非通航孔引桥双层结合全焊简支钢桁梁为背景,根据钢桁梁实际拼装工艺,采用MIDAS/Civil有限元软件建立空间模型,对比分析了主桁上弦杆在压缩试验过程中的受力情况。并且建立不同工况下的模型,通过对钢桁梁公路纵梁应力数据的分析,得出了在钢桁梁压缩拼接的过程中,不仅要注意钢桁梁纵向拼接的先后顺序,同时要考虑每节间内横向的拼接顺序,以更好地解决主桁与桥面系共同作用对公路横梁的影响。
The researches are based on a rail-cum-road non-navigable bridge with 80 m span and double deck all-welded simply supported steel truss girder. According to the actual assembly process of steel truss girder,a space model is established by MIDAS/Civil finite element software. A comparative analysis on forces of the top chord of the main truss during the preloading test was made. Accordingly,another model under different working conditions was established. By analyzing the stress data of the longitudinal beam of steel truss girder,it is concluded that in the process of compression splicing on the steel truss girder,the sequence of longitudinal splicing of steel truss girder should be paid attention to. Additionally,the horizontal splicing sequence of each section should be taken into consideration in order to better solve the influence of the main raft and the bridge deck on the highway beam.
The researches are based on a rail-cum-road non-navigable bridge with 80 m span and double deck all-welded simply supported steel truss girder. According to the actual assembly process of steel truss girder,a space model is established by MIDAS/Civil finite element software. A comparative analysis on forces of the top chord of the main truss during the preloading test was made. Accordingly,another model under different working conditions was established. By analyzing the stress data of the longitudinal beam of steel truss girder,it is concluded that in the process of compression splicing on the steel truss girder,the sequence of longitudinal splicing of steel truss girder should be paid attention to. Additionally,the horizontal splicing sequence of each section should be taken into consideration in order to better solve the influence of the main raft and the bridge deck on the highway beam.
引文
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3 鄢怀斌,郑自元,黄行裕.铜陵公铁两用长江大桥钢桁梁全焊桁片制造技术[J].桥梁建设,2014,44(1):6-10Yan Huaibin,Zheng Ziyuan,Huang Xingyu. Manufacturing techniques for all-welded truss units of steel girder of tongling changjiang river-cum-road bridge[J]. Bridge Construction,2014,44(1):6-10
4 孙英杰,徐伟.平潭海峡公铁两用大桥双层结合全焊钢桁梁设计[J].桥梁建设,2016,46(1):1-5Sun Yingjie,Xu Wei. Design of composite double decks and fully welded steel truss girder of pingtan[J]. Bridge Construction,2016,46(1):1-5
5 黄小峰,王荣辉.钢桁梁制造和拼装误差对桁架内力的影响分析[J].科学技术与工程,2012,12(19):252-257Huang Xiaofeng,Wang Ronghui. Analysis of influence of manufacturing and assembly error of steel truss on internal force of truss[J].Science Technology and Engineering,2012,12(19):252-257
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7 陈荣毅,董石麟.大跨度张弦钢桁架的预应力施工[J].空间结构,2003,9(2):61-63Chen Rongyi,Dong Shilin. Prestressing work of a long-span steel truss string structure[J]. Spatial Structures,2003,9(2):61-63
8 张兴志,朴泷,孙英杰.减小桥面系与主桁共同作用效应的技术措施方案比选[J].世界桥梁,2016,44(3):21-24Zhang Xingzhi,Pu Long,Sun Yingjie. Scheme comparison and selection for techniques used to mitigate interaction between bridge deck and main truss[J]. World Bridges,2016,44(3):21-24
9 康晋,段雪炜,徐伟.平潭海峡公铁两用大桥主桥整节段全焊钢桁梁设计[J].桥梁建设,2015,45(5):1-6Kang Jin,Duan Xuewei,Xu Wei. Design of full block and all-welded steel truss girder of main bridge of pingtan straits rail-cum-road bridge[J]. Bridge Construction,2015,45(5):1-6
10 兰阳,王志平.大跨多线钢桁梁主桁与桥面系共同作用分析与解决方案研究[J].钢结构,2012,27(2):20-23Lan Yang,Wang Zhiping. Research on the interaction on the main truss and bridge decking of long-span and multi-line steel truss bridge and solution scheme[J]. Steel Construction,2012,27(2):20-23
11 王东辉.平潭海峡公铁两用大桥简支钢桁梁制造关键技术[J].桥梁建设,2018,48(3):1-4Wang Donghui. Key manufacturing technology of simply-supported steel truss girders for pingtan straits rail-cum-road bridge[J]. Bridge Construction,2018,48(3):1-4
2 何旭辉,刘立亚,邹云峰,等.铁路钢桁梁斜拉桥单悬臂施工方法研究[J].桥梁建设,2016,46(1):100-105He Xuhui,Liu Liya,Zou Yunfeng,et al. Study of single-cantilever construction method for railway steel truss girder cable-stayed bridges[J]. Bridge Construction,2016,46(1):100-105
3 鄢怀斌,郑自元,黄行裕.铜陵公铁两用长江大桥钢桁梁全焊桁片制造技术[J].桥梁建设,2014,44(1):6-10Yan Huaibin,Zheng Ziyuan,Huang Xingyu. Manufacturing techniques for all-welded truss units of steel girder of tongling changjiang river-cum-road bridge[J]. Bridge Construction,2014,44(1):6-10
4 孙英杰,徐伟.平潭海峡公铁两用大桥双层结合全焊钢桁梁设计[J].桥梁建设,2016,46(1):1-5Sun Yingjie,Xu Wei. Design of composite double decks and fully welded steel truss girder of pingtan[J]. Bridge Construction,2016,46(1):1-5
5 黄小峰,王荣辉.钢桁梁制造和拼装误差对桁架内力的影响分析[J].科学技术与工程,2012,12(19):252-257Huang Xiaofeng,Wang Ronghui. Analysis of influence of manufacturing and assembly error of steel truss on internal force of truss[J].Science Technology and Engineering,2012,12(19):252-257
6 陈国栋,蔡健.节点弯矩在矩形钢管桁架中的影响分析[J].科学技术与工程,2008,8(3):819-823Chen Guodong,Cai Jian. Analysis of the effect caused by the nodal moment on the rectangular steel tubular truss[J]. Science Technology and Engineering,2008,8(3):819-823
7 陈荣毅,董石麟.大跨度张弦钢桁架的预应力施工[J].空间结构,2003,9(2):61-63Chen Rongyi,Dong Shilin. Prestressing work of a long-span steel truss string structure[J]. Spatial Structures,2003,9(2):61-63
8 张兴志,朴泷,孙英杰.减小桥面系与主桁共同作用效应的技术措施方案比选[J].世界桥梁,2016,44(3):21-24Zhang Xingzhi,Pu Long,Sun Yingjie. Scheme comparison and selection for techniques used to mitigate interaction between bridge deck and main truss[J]. World Bridges,2016,44(3):21-24
9 康晋,段雪炜,徐伟.平潭海峡公铁两用大桥主桥整节段全焊钢桁梁设计[J].桥梁建设,2015,45(5):1-6Kang Jin,Duan Xuewei,Xu Wei. Design of full block and all-welded steel truss girder of main bridge of pingtan straits rail-cum-road bridge[J]. Bridge Construction,2015,45(5):1-6
10 兰阳,王志平.大跨多线钢桁梁主桁与桥面系共同作用分析与解决方案研究[J].钢结构,2012,27(2):20-23Lan Yang,Wang Zhiping. Research on the interaction on the main truss and bridge decking of long-span and multi-line steel truss bridge and solution scheme[J]. Steel Construction,2012,27(2):20-23
11 王东辉.平潭海峡公铁两用大桥简支钢桁梁制造关键技术[J].桥梁建设,2018,48(3):1-4Wang Donghui. Key manufacturing technology of simply-supported steel truss girders for pingtan straits rail-cum-road bridge[J]. Bridge Construction,2018,48(3):1-4