摘要
以一座整体式预应力葵花拱桥为例,采用Midas/Civil建立了计算模型,分析了整体式预应力葵花拱桥主腹拱连接方式、矢跨比对结构受力性能的影响以及主腹拱连接方式对拱圈稳定性的影响。研究结果表明:(1)主腹拱采用固接比采用铰接对结构的受力更为有利;(2)主拱矢跨比对部分控制截面的恒载内力值影响较大,建议主拱矢跨比在1∶7～1∶6之间;(3)腹拱最优矢跨比在1∶7～1∶5之间;(4)主腹拱固接时拱圈的稳定性比主腹拱铰接时好。研究成果可为类似中小跨度葵花拱桥的工程应用提供理论依据。
Taking a integral prestressed sunflower arch bridge as an example, a calculation model in this paper was built with Midas/Civil. The mechanical behavior of the integral prestressed sunflower arch bridge with different connection patterns and rise-span ratios was studied. And the influence of different connection types between the main and ventral arches on the stability of the arch ring under was analyzed. The analysis results were shown ： （ 1 ） it was more beneficial to the mechanical behavior of the structure when the main and ventral arches were fixed than hinged ; （2） the influence of the rise-span for main arches to some control sections＇ dead load internal force was relatively big and we adviced the the rise-span for main arches was between 1 ： 7 and 1 ： 6 ; （3） the optimal rise-span ratios for ventral arches was between 1 ： 7 and 1 ： 5 ; （4） the stability of the arch ring was better when the main and ventral arches were fixed than hinged. The results provided theoretical references for the engineering application of similar small and medium-sized span sunflower-shaped arch bridge.
出处
《土木工程与管理学报》
2013年第3期12-17,28,共7页
Journal of Civil Engineering and Management
基金
国家自然科学基金(51278393)
作者简介
康俊涛（1978-），男，湖北仙桃人，副教授，博士，研究方向为新型桥梁结构分析，在役桥梁性能评价及加固技术（Email：jtkang@163．com）
