内倾角对钢管混凝土提篮拱力学性能影响的分析
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摘要
在一定的基本假定前提下,研究了内倾角对钢管混凝土提篮拱桥力学性能的影响。以广州丫髻沙大桥为原型,采用有限元方法,分别计算不同内倾角模型在永久作用下的稳定安全系数,在移动可变作用下的内力影响线以及自振特性。通过计算结果分析内倾角变化对钢管混凝土提篮拱桥稳定性、静力和动力特性的影响,结果表明:随着内倾角的增大,横向稳定系数增大;主拱肋内力也增大,但变化幅度很小;拱肋的横向刚度随之增大,但是面内的刚度却是不断减小。
The leaning angle affecting the concrete-filled steel tube X arch bridge's mechanical properties was investigated based on some assumption.Taking the archetype of Guangzhou Yajisha arch bridge,the stable coefficient under permanent action,the Influence line of internal force under mobile variable action and natural vibration characteristics of different leaning angle models were respectively attained by adopting finite element method.Basing on the results of calculation,the effects of leaning angle on stability、static and(dynamic) behavior of concrete-filled steel tube X arch bridge were analyzed.The results showed that the stable coefficient,internal force and the lateral stiffness increased when the leaning angle increased,there was only little change in the internal force,but the vertical stiffness decreased when the leaning angle increased.
The leaning angle affecting the concrete-filled steel tube X arch bridge's mechanical properties was investigated based on some assumption.Taking the archetype of Guangzhou Yajisha arch bridge,the stable coefficient under permanent action,the Influence line of internal force under mobile variable action and natural vibration characteristics of different leaning angle models were respectively attained by adopting finite element method.Basing on the results of calculation,the effects of leaning angle on stability、static and(dynamic) behavior of concrete-filled steel tube X arch bridge were analyzed.The results showed that the stable coefficient,internal force and the lateral stiffness increased when the leaning angle increased,there was only little change in the internal force,but the vertical stiffness decreased when the leaning angle increased.
引文
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[2]金伟良.大跨度拱桥的横向稳定性分析[D].大连:大连理工大学,1988.
[3]程海根,强士中.钢管混凝土提篮拱动力特性分析[J].公路交通科技,2002,19(3):63-65.
[4]商从晋.钢管混凝土提篮拱桥地震响应分析[J].广西城镇建设,2005(4):32-33.
[5]吴定俊,王小松,项海帆.高速铁路尼尔森拱桥车桥动力特性[J].铁道学报,2003,25(3):96-100.
[6]张石波,裴若娟.浅谈尼尔森体系的钢管混凝土提篮拱在铁路桥梁中的运用前景[J].桥梁建设,2001(4):56-58.
[7]邱文亮,黄才良,邓安泰.钢管混凝土拱桥拱肋倾角对稳定性影响的研究[J].公路交通科技,2004,21(4):53-55.
[8]王弘.钢管混凝土提篮拱桥静力稳定的参数分析[J].有色冶金设计与研究,2004,25(4):52-56.
[9]汤国栋,谢玲玲,陈向东,等.集束钢管混凝土提篮拱桥[J].公路,1997(4):17-19.
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