系杆拱桥拱肋内混凝土非对称浇筑量化影响分析  

Quantitative analysis on asymmetrical pouring of concrete in the arch rib of tied arch bridge

作　　者：杜迎东 王起才[1] 张戎令[1] 杨阳[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《铁道科学与工程学报》2015年第6期1394-1400,共7页Journal of Railway Science and Engineering

基　　金：长江学者和创新团队发展计划项目(IRT1139);铁道部科技研究开发计划项目(2012G011-A)

摘　　要：为找到拱肋内混凝土非对称浇筑施工与对称浇筑施工的量化差异,使用三维有限元分析软件MIDAS/civil模拟拱肋对称浇筑和非对称浇筑2种情形,分别分析2种情形中拱肋和系梁在单侧浇筑一半(单侧筑半)、单侧浇筑完毕(单侧筑毕)、徐变3种工况下相同位置处的位移、弯矩变化规律,量化指出非对称浇筑的弊端。结果表明:非对称浇筑时拱肋的位移最大比对称浇筑的大26.1%,弯矩最大比对称浇筑的大164.3%;非对称浇筑时系梁的位移最大比对称浇筑的大24.3%,弯矩最大比对称浇筑的大13.4%,不宜非对称浇筑拱肋内混凝土。In order to explore the difference between asymmetrical and symmetrical construction,the large 3D finite element analysis software MIDAS / civil has been used to simulate two circumstances of arch rib symmetrical and asymmetrical pouring,The displacement and bending value variation law of the arch rib and tie beam of two circumstances respectively in the three conditions： unilateral pouring half,unilateral pouring over and creep are also analysed,Thus the disachvantages of asymmetrical pouring is pointed out. Results show that displacement of archlib and bending in asymmetrical pouring are 26. 1% and 164. 3% bigge than that in symmetrical pouring.Beside,tie beam displacement and bending in asymmetrical pouring are 24. 3% and 13. 4% bigger than that in symmetrical pouring. Thus asymmetric pouring concrete in arch rib is unreasonable.

关 键 词：系杆拱桥 非对称浇筑 量化影响 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]