矮塔斜拉桥设计参数对其受力及变形的影响规律研究——以南盘江特大桥为例  

Research on the Influence Law of Design Parameters of Extradosed Cable——stayed Bridge on Its Stress and Deformation—Taking Nanpan River Grand Bridge as an Example

作　　者：姜广伦 钟强铭 姜玉杰 张丹 何俊龙 范肖波 JIANG Guanglun;ZHONG Qiangming;JIANG Yujie;ZHANG Dan;HE Junlong;FAN Xiaobo(Shandong Hi-speed Yunnan Development Co.,Ltd.,Kunming 650200,Yunnan,China;School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China;Xi'an Municipal Engineering Design&Research Institute Co.,Ltd.,Xi'an 710068,Shaanxi,China)

机构地区：[1]山东高速云南发展有限公司,云南昆明650200 [2]长安大学公路学院,陕西西安710064 [3]西安市政设计研究院有限公司,陕西西安710068

出　　处：《工程技术研究》2023年第4期24-29,共6页Engineering and Technological Research

摘　　要：为研究不同设计参数对矮塔斜拉桥受力及变形的影响规律,文章以南盘江特大桥为研究对象,对比分析不同塔跨比、边中跨比、墩梁连接方式对主梁受力及变形的影响规律。结果表明:(1)随着塔跨比增大,成桥索力呈下降的趋势,中跨跨中弯矩有微小增幅,而墩顶弯矩、边跨0.4L处弯矩以及主梁最大挠度减小(L为边跨跨径);(2)随着边中跨比的增大,矮塔斜拉桥主梁中跨跨中弯矩和边跨0.4L处的弯矩逐渐增大,而墩顶弯矩则先减小而后稳定再增大,成桥索力先减小后增大;(3)墩梁铰接体系与墩梁刚接体系相比,成桥索力略大,中跨跨中弯矩和墩顶弯矩减幅不大,而边跨0.4L处弯矩增加。In order to study the influence law of different design parameters on the stress and deformation of extradosed cable-stayed bridge,this paper takes Nanpan River Bridge as the research object,and compares and analyzes the influence of different tower-span ratio,side to mid-span ratio,and pier-beam connection mode on the stress and deformation of the main beam.The results show that:(1)With the increase of the tower-span ratio,the cable force of the completed bridge decreases,the bending moment of the mid-span increases slightly,while the bending moment at the pier top and at the side span 0.4L and the maximum deflection of the main beam decrease(L is the span of side span);(2)With the increase of the ratio of the side to mid-span,the bending moment at the mid-span and at the side span 0.4L of the main beam of the extradosed cable-stayed bridge gradually increase,while the bending moment at the pier top decreases first and then stabilizes and increases,and the cable force of the completed bridge decreases first and then increases;(3)Compared with the pier-beam rigid connection system,the cable force under the hinged pier-beam system of the completed bridge is slightly larger,and the bending moment at the mid-span and the pier top decreases slightly,while the bending moment at the side span 0.4L increases.

关 键 词：矮塔斜拉桥 设计参数 受力 变形 

分 类 号：U44[建筑科学—桥梁与隧道工程]