空间预应力钢束精细化有限元建模方法
|
摘要
为了建立同时包含平弯和竖弯的空间曲线预应力钢束连续平滑模型,在有限元分析中考虑空间预应力钢束的各项力学效应,提出了基于相贯线的空间预应力钢束精细化建模方法,确定了钢束、孔道与梁体三者之间的节点对应连接方式,并给出了相应的建模程序.首先采用辅助实体相贯的方法,建立了空间预应力钢束的连续平滑几何模型;然后沿该空间曲线建立孔道实体,并与混凝土主梁进行布尔运算,实现钢束、孔道与梁体三者之间的节点对应连接.以贵州红水河特大桥钢-混结合段的建模与分析为例,计算结果表明:与传统的约束方程法相比,采用本文方法计算得到的梁体最大局部压应力降低26.3%,应力集中现象明显改善;钢束有效应力分布平顺、无波动,更符合实际情况.
In order to establish a continuous smooth model of spatial prestressed steel beam include both horizontal and vertical curvature,to consider the mechanical effects of spatial prestressed steel beam in finite element analysis,the refined finite element modeling method of spatial prestressed steel beam based on intersecting line was proposed,so the connection mode of the nodes between the spatial prestressed steel beam,duct and concrete girder could be ascertained,and the corresponding modeling procedure was given. The continuous smooth geometric model of spatial prestressed steel beam was established by the intersecting auxiliary bodies. The nodes corresponding relationship between steel beam,duct and concrete girder were achieved by establishing the solid model of duct and performing Boolean operations with main girder. Take the finite element modeling and analysis of the steelconcrete joint section of the Hongshui River bridge in Guizhou as an example,the results show that the maximum local stress of girder decreased by 26. 3%,and the stress concentration is improved obviously compared with the traditional constraint equation method,the effective prestress distribution of steel beam is smooth,non-oscillating,the proposed method is more in line with the actual situation.
In order to establish a continuous smooth model of spatial prestressed steel beam include both horizontal and vertical curvature,to consider the mechanical effects of spatial prestressed steel beam in finite element analysis,the refined finite element modeling method of spatial prestressed steel beam based on intersecting line was proposed,so the connection mode of the nodes between the spatial prestressed steel beam,duct and concrete girder could be ascertained,and the corresponding modeling procedure was given. The continuous smooth geometric model of spatial prestressed steel beam was established by the intersecting auxiliary bodies. The nodes corresponding relationship between steel beam,duct and concrete girder were achieved by establishing the solid model of duct and performing Boolean operations with main girder. Take the finite element modeling and analysis of the steelconcrete joint section of the Hongshui River bridge in Guizhou as an example,the results show that the maximum local stress of girder decreased by 26. 3%,and the stress concentration is improved obviously compared with the traditional constraint equation method,the effective prestress distribution of steel beam is smooth,non-oscillating,the proposed method is more in line with the actual situation.
引文
[1]项海帆.高等桥梁结构理论[M].2版.北京:人民交通出版社,2013:79-80.
[2]周绪红,戴鹏,狄谨,等.曲线箱梁桥空间预应力效应分析[J].土木工程学报,2007,40(3):63-68.ZHOU Xuhong,DAI Peng,DI Jin,et al.Effect of spatial prestressing for curved box girder bridges[J].China Civil Engineering Journal,2007,40(3):63-68.
[3]陈开利,王戒躁,安群慧.舟山桃夭门大桥钢与混凝土结合段模型试验研究[J].土木工程学报,2006,39(3):86-90.CHEN Kaili,WANG Jiezao,AN Qunhui.Model tests on steel-concrete joining section of main girder of a cable-stayed bridge[J].China Civil Engineering Journal,2006,39(3):86-90.
[4]肖汝诚.桥梁结构分析及程序系统[M].北京:人民交通出版社,2002:118-131.
[5]张景峰,李小珍,肖林,等.混合梁斜拉桥钢-混结合段受力行为仿真分析[J].西南交通大学学报,2014,49(4):619-625.ZHANG Jingfeng,LI Xiaozhen,XIAO Lin,et al.Numerical simulation analysis of steel-concrete joint section in hybrid girder of cable-stayed bridge[J].Journal of Southwest Jiaotong University,2014,49(4):619-625.
[6]钟新谷,林小雄,舒小娟.预应力混凝土变截面箱梁桥底板预应力束的等效径向力研究[J].土木工程学报,2013,46(4):103-109.ZHONG Xingu,LIN Xiaoxiong,SHU Xiaojuan.Study on equivalent radial force in prestressed cable of the prestressed concrete variable cross-section box girder bridges[J].China Civil Engineering Journal,2013,46(4):103-109.
[7]王军文,倪章军,李建中,等.石板坡长江大桥钢混结合段局部应力分析[J].公路交通科技,2007,24(8):99-102.WANG Junwen,NI Zhangjun,LI Jianzhong,et al.Analysis on local stress of steel-concrete beam linked part of shibanpo bridge[J].Journal of Highway and Transportation Research and Development,2007,24(8):99-102.
[8]贾艳敏,王佳伟,韩基刚.预应力简支钢箱梁固有频率影响因素分析[J].工程力学,2009,26(增刊1):37-40.JIA Yanmin,WANG Jiawei,HAN Jigang.Analysis of influentional factors on natural frequencies of simply supported steel box girder withprestressed tendons[J].Engineering Mechanics,2009,26(Sup.1):37-40.
[9]刘艳萍,杨新华,杨文兵.预应力钢筋混凝土局部有限元分析的ANSYS二次开发[J].华中科技大学学报:城市科学版,2005,22(增刊1):87-90.LIU Yanping,YANG Xinhua,YANG Wenbing.ANSYS secondary development for the finite element analysis of pre-stressed reinforced concrete structures[J].Journal of Huazhong University of Science and Technology:Urban Science Edition,2005,22(Sup.1):87-90.
[10]陈海兵,曾国良,陈明芳.混合梁斜拉桥钢混结合段的局部应力分析[J].公路工程,2009(6):99-103.CHEN Haibing,ZENG Guoliang,CHEN Mingfang.Analysis on local stress of steel-concrete joining sections of a cable stayed bridge[J].Highway Engineering,2009(6):99-103.
[11]邵容光,夏淦.混凝土弯梁桥[M].北京:人民交通出版社,1994:229-233.
[12]ANSYS Inc.ANSYS parametric design language guide release 15.0[M].Pennsylvania:ANSYS Inc,2013:5-9.
[13]徐国平,张喜刚,刘玉擎,等.混合梁斜拉桥[M].2版.北京:人民交通出版社,2013:128-140.
[14]李小珍,肖林,黄玲,等.混合梁斜拉桥钢-混结合段静力行为[J].哈尔滨工业大学学报,2013,45(6):75-82.LI Xiaozhen,XIAO Lin,HUANG Ling,et al.Static mechanical behavior of steel-concrete joint section of hybrid beam cable-stayed bridges[J].Journal of HARBIN institute of Technology,2013,45(6):75-82.
[15]马付彪,赵鸿铁,薛建阳.型钢与混凝土间的粘结强度分析[J].西安建筑科技大学学报:自然科学版,2007,39(1):83-86.MA Fubiao,ZHAO Hongtie,XUE Jianyang.Analysis on the bond strength between steel shape and concrete in SRC structures[J].Journal of Xi'an University of Architecture&Technology:Natural Science Edition,2007,39(1):83-86.
[2]周绪红,戴鹏,狄谨,等.曲线箱梁桥空间预应力效应分析[J].土木工程学报,2007,40(3):63-68.ZHOU Xuhong,DAI Peng,DI Jin,et al.Effect of spatial prestressing for curved box girder bridges[J].China Civil Engineering Journal,2007,40(3):63-68.
[3]陈开利,王戒躁,安群慧.舟山桃夭门大桥钢与混凝土结合段模型试验研究[J].土木工程学报,2006,39(3):86-90.CHEN Kaili,WANG Jiezao,AN Qunhui.Model tests on steel-concrete joining section of main girder of a cable-stayed bridge[J].China Civil Engineering Journal,2006,39(3):86-90.
[4]肖汝诚.桥梁结构分析及程序系统[M].北京:人民交通出版社,2002:118-131.
[5]张景峰,李小珍,肖林,等.混合梁斜拉桥钢-混结合段受力行为仿真分析[J].西南交通大学学报,2014,49(4):619-625.ZHANG Jingfeng,LI Xiaozhen,XIAO Lin,et al.Numerical simulation analysis of steel-concrete joint section in hybrid girder of cable-stayed bridge[J].Journal of Southwest Jiaotong University,2014,49(4):619-625.
[6]钟新谷,林小雄,舒小娟.预应力混凝土变截面箱梁桥底板预应力束的等效径向力研究[J].土木工程学报,2013,46(4):103-109.ZHONG Xingu,LIN Xiaoxiong,SHU Xiaojuan.Study on equivalent radial force in prestressed cable of the prestressed concrete variable cross-section box girder bridges[J].China Civil Engineering Journal,2013,46(4):103-109.
[7]王军文,倪章军,李建中,等.石板坡长江大桥钢混结合段局部应力分析[J].公路交通科技,2007,24(8):99-102.WANG Junwen,NI Zhangjun,LI Jianzhong,et al.Analysis on local stress of steel-concrete beam linked part of shibanpo bridge[J].Journal of Highway and Transportation Research and Development,2007,24(8):99-102.
[8]贾艳敏,王佳伟,韩基刚.预应力简支钢箱梁固有频率影响因素分析[J].工程力学,2009,26(增刊1):37-40.JIA Yanmin,WANG Jiawei,HAN Jigang.Analysis of influentional factors on natural frequencies of simply supported steel box girder withprestressed tendons[J].Engineering Mechanics,2009,26(Sup.1):37-40.
[9]刘艳萍,杨新华,杨文兵.预应力钢筋混凝土局部有限元分析的ANSYS二次开发[J].华中科技大学学报:城市科学版,2005,22(增刊1):87-90.LIU Yanping,YANG Xinhua,YANG Wenbing.ANSYS secondary development for the finite element analysis of pre-stressed reinforced concrete structures[J].Journal of Huazhong University of Science and Technology:Urban Science Edition,2005,22(Sup.1):87-90.
[10]陈海兵,曾国良,陈明芳.混合梁斜拉桥钢混结合段的局部应力分析[J].公路工程,2009(6):99-103.CHEN Haibing,ZENG Guoliang,CHEN Mingfang.Analysis on local stress of steel-concrete joining sections of a cable stayed bridge[J].Highway Engineering,2009(6):99-103.
[11]邵容光,夏淦.混凝土弯梁桥[M].北京:人民交通出版社,1994:229-233.
[12]ANSYS Inc.ANSYS parametric design language guide release 15.0[M].Pennsylvania:ANSYS Inc,2013:5-9.
[13]徐国平,张喜刚,刘玉擎,等.混合梁斜拉桥[M].2版.北京:人民交通出版社,2013:128-140.
[14]李小珍,肖林,黄玲,等.混合梁斜拉桥钢-混结合段静力行为[J].哈尔滨工业大学学报,2013,45(6):75-82.LI Xiaozhen,XIAO Lin,HUANG Ling,et al.Static mechanical behavior of steel-concrete joint section of hybrid beam cable-stayed bridges[J].Journal of HARBIN institute of Technology,2013,45(6):75-82.
[15]马付彪,赵鸿铁,薛建阳.型钢与混凝土间的粘结强度分析[J].西安建筑科技大学学报:自然科学版,2007,39(1):83-86.MA Fubiao,ZHAO Hongtie,XUE Jianyang.Analysis on the bond strength between steel shape and concrete in SRC structures[J].Journal of Xi'an University of Architecture&Technology:Natural Science Edition,2007,39(1):83-86.