•  
  •  
 

Abstract

In order to study the mechanical behavior of the consolidation zone of the tower beam pier of the rotary cable-stayed bridge without backstays, a fine finite element model of the consolidation zone of the tower beam pier was established by using the finite element analysis method based on Shanban Bridge in Chengdu. The research results show that the longitudinal compressive members of the structure are under pressure during service; the longitudinal compressive stress on the main span side of the beam body is within −8.2 MPa (absolute value), and the longitudinal compressive stress on the side span side is within −14.0 MPa (absolute value). There is a large compressive stress reserve in the negative bending moment area of the main beam, and it meets the requirements of the standard. The longitudinal prestressed steel beam layout is reasonable. Under five working conditions, the transverse normal stress in the consolidation zone is −8.5–1.7 MPa, and there are some tensile stresses in the roof of the cantilever root of the small beam, all of which are less than 1.7 MPa, which can properly strengthen the transverse ordinary reinforcement layout. The bending moment of the bridge tower along the cable-stayed bridge without backstays under live load should be emphasized. In the stage of rotating construction, the axial force of the main beam is gradually transferred to the pier through the consolidation of tower pier beams, and the transfer process is stable.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.024

First Page

131

Last Page

136

Submission Date

May 2025

Reference

[1] 戴公连, 粟淼, 刘文硕, 等. 槽型断面梁斜拉桥塔梁墩固结区受力特性研究[J]. 湖南大学学报(自然科学版), 2014, 41(1): 27-32.DAI Gonglian, SU Miao, LIU Wenshuo, et al. Stress analysis of pier-tower-girder fixed region of cable-stayed bridge with trough girder[J]. Journal of Hunan University (Natural Sciences), 2014, 41(1): 27-32. [2] 周敏, 戴公连, 粟淼. 槽型断面斜拉桥塔梁墩固结区应力的数值模拟[J]. 铁道科学与工程学报, 2013, 10(4): 35-40. ZHOU Min, DAI Gonglian, SU Miao. Numerical simulation on stress of pier-tower-girder fixed region of U-shaped section cable-stayed bridge[J]. Journal of Railway Science and Engineering, 2013, 10(4): 35-40. [3] 刘永健, 周绪红, 颜东煌, 等. 单边索斜塔钢—混凝土结合梁斜拉桥塔梁根部应力分析[J]. 中国公路学报, 2003, 16(2): 65-69. LIU Yongjian, ZHOU Xuhong, YAN Donghuang, et al. Stress analysis of tower-beam joint of inclined tower cable-stayed bridge with steel-concrete girder[J]. China Journal of Highway and Transport, 2003, 16(2): 65-69. [4] 虞庐松, 朱东生. 部分斜拉桥塔梁墩固结点局部应力分析[J]. 桥梁建设, 2008, 38(1): 54-57.YU Lusong, ZHU Dongsheng. Local stress analysis of rigid fixity joint of pylon, girder and pier of an extradosed bridge[J]. Bridge Construction, 2008, 38(1): 54-57. [5] 陈小玲. 单索面矮塔斜拉桥塔梁墩固结局部应力分析[J]. 交通科技, 2012(1): 4-6. CHEN Xiaoling. Study on local stress of linked part of tower and beam in low tower single-cable plane cable-stayed bridge[J]. Transportation Science & Technology, 2012(1): 4-6. [6] 俞英, 王亚飞. 混合梁斜拉桥塔梁墩固结区受力性能试验研究[J]. 交通科技, 2018(1): 25-27.YU Ying, WANG Yafei. Transportation Science & Technology, 2018(1): 25-27. [7] 宋军, 周建庭, 陈增顺. 基于子模型法的斜拉桥塔梁墩固结段局部分析[J]. 重庆交通大学学报(自然科学版), 2013, 32(3): 379-384. SONG Jun, ZHOU Jianting, CHEN Zengshun. Analysis on fixed tower-beam-pier part of cable-stayed bridge based on sub-model method[J]. Journal of Chongqing Jiaotong University (Natural Science), 2013, 32(3): 379-384. [8] 宋宪毅, 王敏. 长门特大桥塔梁墩固结区局部构造设计参数分析[J]. 世界桥梁, 2018, 46(2): 10-14.SONG Xianyi, WANG Min. Analysis of design parameters of local details in pylon-girder-pier fixed region of changmen bridge[J]. World Bridges, 2018, 46(2): 10-14. [9] 胡玉柳. 长门特大桥主桥塔梁墩固结区模型试验研究[J]. 桥梁建设, 2018, 48(2): 72-76. HU Yuliu. Model test study of rigid fixity area of pylon, main girder and pier of main bridge of changmen bridge[J]. Bridge Construction, 2018, 48(2): 72-76.

Download

Share

COinS