施工偏位对预应力连续梁桥墩身承载力的影响分析  

Effect Analysis of the Construction Offset on the Force of Prestressed Continuous Girder Bridge Pier

作　　者：李鹏飞 陶小委 LI Pengfei;TAO Xiaowei(Henan Province Yunan High Speed Investment Co.,Ltd.,Xinyang 464000,China;School of Traffic Engineering of Huanghe Jiaotong University,Jiaozuo 454150,China)

机构地区：[1]河南省豫南高速投资有限公司,河南信阳464000 [2]黄河交通学院交通工程学院,河南焦作454150

出　　处：《河南科技》2023年第3期86-89,共4页Henan Science and Technology

摘　　要：【目的】以某公路5×30 m预应力箱梁桥为工程背景,为确定墩身偏位对结构承载的影响。【方法】利用高精度全站仪对墩身垂直度进行检测,并采用有限元计算分析方法,在考虑墩身偏位影响的基础上对桥墩承载能力进行验算分析。【结果】结果表明:6.274 m高的圆柱形墩身立柱,在垂直度为4.96‰时,墩身截面强度和抗裂能力仍能满足设计要求,且承载力仍有较大富余。【结论】偏位后的桥墩仍能满足正常使用要求。[Purposes]In order to determine the influence of pier deflection on structural load bearing,a highway 5×30 m prestressed box girder bridge was taken as the engineering background.[Methods]The pier verticality was inspected by using high precision total station,and the finite element calculation and analysis method was used to carry out the calculation and analysis of the bearing capacity of the bridge pier on the basis of considering the influence of pier deflection.[Findings]The results show that 6.274 m high cylindrical pier column,in the vertical degree of 4.96‰,the piersection strength and crack resistance can still meet the design requirements,and the bearing capacity still has a large surplus.[Conclusions]The bridge piers with offset can still meet the normal use requirements.

关 键 词：墩身偏位 垂直度 圆柱式桥墩 截面强度 抗裂能力 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]