T梁张拉侧弯问题的计算分析  

Calculation and Analysis of the Tension side Bending problem of T girder

作　　者：陈天地[1] Chen Tian-di China Railway ErYuan Engineering Group Co.Ltd Chengdu 610031 China

机构地区：[1]中国中铁二院工程集团有限责任公司,四川成都610031

出　　处：《城市建设理论研究（电子版）》2018年第16期83-84,共2页Theoretical Research in Urban Construction

摘　　要：后张法预应力混凝土T梁,在张拉时难免存在不对称(偏心)张拉情况.因此.在梁上会产生一个平面外弯矩,从而使梁产生了侧弯变形。因为T型梁的侧向弯曲刚度比竖向弯曲刚度要小的多,因此产生的侧弯变形是不容忽视的。通过40米T梁桥的一根边梁,采用不同张拉方案时跨中侧弯值的计算对比分析,得出有效防止T梁在张拉后产生侧弯的合理张拉顺序,为以后的设计与施工提供一个参考。The prestressed concrete T girder of post-tensioning method, there have asymmetric （decentration） in the prestressing. So the girder will produced lateral moment distort the lateral deflection. Because the lateral deflection rigidity less than vertical deflection rigidity of T girder, so the lateral deflection is never ignorance. According to the measure analysis of midspan lateral deflection number in different stretching scheme which was one boundary beam of someone express highway T girder bridge, get the appropriate stretching subsequence which can effective prevention T girder lateral deflection. It can provide consult for design and construction in the prestressing ofT girder.

关 键 词：预应力混凝土T梁 侧向弯曲 钢束张拉 计算分析 

分 类 号：U448.212[建筑科学—桥梁与隧道工程]