大跨度小半径曲线梁桥抗倾覆性能研究
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摘要
为研究大跨度小半径独立柱曲线梁桥的抗倾覆性能,以中间墩采用独立柱单支座的曲线连续梁桥为研究对象,通过规范中的抗倾覆系数计算公式进行抗倾覆性能验算。以武汉市某立交匝道桥为例,利用Midas梁格法,建立有限元模型并进行分析计算,研究了弯梁桥曲线半径的大小、车辆荷载的超载程度及支座的布置形式等对城市小半径独立柱曲线梁桥抗倾覆性能的影响。计算结果表明:曲线半径的取值、车辆荷载的交通管控及曲线桥的支座布置形式等均对大跨度小半径曲线梁桥的抗倾覆稳定有较大的影响。
In order to study the anti-overturning performance of large-span small-radius independent column curved girder bridges, the curved continuous girder bridge with independent columns and single supports was used as the object. The anti-overturning coefficient calculation formula was used to check the anti-overturn performance. Taking a ramp bridge as an example, the finite element model was established by midas for analysis and calculation. The curve radius of the curved beam bridge, the overload degree of the vehicle load and the arrangement of the support for the anti-overturning performance of the small radius curved beam bridge was investigated. The results show that the value of the curve radius, the traffic control of the vehicle load and the bearing arrangement of the curve bridge have a great influence on the anti-overturn stability of the long-span small-radius curved beam bridge.
In order to study the anti-overturning performance of large-span small-radius independent column curved girder bridges, the curved continuous girder bridge with independent columns and single supports was used as the object. The anti-overturning coefficient calculation formula was used to check the anti-overturn performance. Taking a ramp bridge as an example, the finite element model was established by midas for analysis and calculation. The curve radius of the curved beam bridge, the overload degree of the vehicle load and the arrangement of the support for the anti-overturning performance of the small radius curved beam bridge was investigated. The results show that the value of the curve radius, the traffic control of the vehicle load and the bearing arrangement of the curve bridge have a great influence on the anti-overturn stability of the long-span small-radius curved beam bridge.
引文
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[8]中交公路规划设计院有限公司.JTGD62-2012,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].北京:人民交通出版社,2012.(CCCC Highway Consultants Co.,Ltd..JTGD62-2012,Highway reinforced concrete and prestressed concrete bridge culvert design specification[S].Beijing:China Communications Press,2012.(in Chinese))
[2]胡小波.独柱墩曲线梁桥抗倾覆稳定性分析研究[J].工程建设与设计,2018(5):100-102.(HU Xiao-bo.Analysis of the anti-overturning stability of curved beam bridges with single column piers[J].Engineering Construction and Design,2018(5):100-102.(in Chinese))
[3]林心洁,罗韧,孙鹏.地震作用下由落梁引起的曲线梁桥连续倒塌过程分析[J].公路工程,2016,41(1):38-45.(LINXin-jie,LUO Ren,SUN Peng.Analysis of continuous collapse process of curved beam bridges caused by the falling beam under the earthquake[J].Journal of Highway Engineering,2016,41(1):38-45.(in Chinese))
[4]邢世玲,张佳,朱利明.独柱混凝土曲线连续梁桥抗倾覆稳定性研究[J].世界桥梁,2017,45(5):33-38.(XINGShi-ling,ZHANG Jia,ZHU Li-ming.Study on the antioverturning stability of the single-column curved continuous beam bridge[J].World Bridge,2017,45(5):33-38.(in Chinese))
[5]李盼到,马利君.独柱支撑匝道桥抗倾覆验算汽车荷载研究[J].桥梁建设,2012,42(3):14-18.(LI Pan-dao,MALi-jun.Research on the anti-overturning checking vehicle load of the single-column supporting road bridge[J].Bridge Construction,2012,42(3):14-18.(in Chinese))
[6]陈彦江,王俊华,闫维明,等.小半径曲线梁桥抗倾覆性能研究[J].公路,2014(10):143-147.(CHEN Yan-jiang,WANG Jun-hua,YAN Wei-ming,et al.Study on the antioverturning performance of small-radius curved beam bridges[J].Highway,2014(10):143-147.(in Chinese))
[7]宋福春,李孟臣,张国强.曲线桥抗倾覆稳定性分析[J].公路,2018,63(4):65-69.(SONG Fu-chun,LI Meng-chen,ZHANG Guo-qiang.Analysis of the anti-overturning stability of curved bridges[J].Highway,2018,63(4):65-69.(in Chinese))
[8]中交公路规划设计院有限公司.JTGD62-2012,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].北京:人民交通出版社,2012.(CCCC Highway Consultants Co.,Ltd..JTGD62-2012,Highway reinforced concrete and prestressed concrete bridge culvert design specification[S].Beijing:China Communications Press,2012.(in Chinese))