顶推法施工的曲线连续梁桥截面实测应力分析

李承君,周世军

铁道工程学报 ›› 2005, Vol. 22 ›› Issue (2) : 23-26.

PDF(318 KB)
PDF(318 KB)
铁道工程学报 ›› 2005, Vol. 22 ›› Issue (2) : 23-26.
路网研究

顶推法施工的曲线连续梁桥截面实测应力分析

  • 李承君,周世军
作者信息 +

ANALYSIS OF MEASURED STRESS ON SECTION OF CURVED CONTINUOUS BRIDGE CONSTRUCTED BY JACK-IN METHOD

  • LI Cheng jun, ZHOU Shi-jun
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文章历史 +

摘要

在采用顶推法施工的曲线连续梁桥的主梁内预埋的钢筋计测得的混凝土应力远大于理论经计算结果,这主要是由混凝土收缩徐变变形中的非弹性变形包含在钢筋计中引起的。本文提出了用于扣除混凝土实测应力中收缩徐变非弹性变形影响的两种计算方法,并且将徐变对实测应力影响计算进行了特殊考虑,在一座大桥进行施工监控中使用取得了较好的效果。

Abstract

As the non-elasticity of slow concrete contraction distortion is shown by reinforcement meter, the concrete stress measured by reinforcement meter pre-buried inside main girder in construction of curved continuous bridge by jack-in method. This paper presents two calculation methods with deductiong influence by slow contraction distortion and special treating the influence on calculation of measured stress by slow distortion. The methods were applied in monitoring construction of one bredge and got good results.

关键词

曲线梁 / 收缩 / 徐变 / 应力

Key words

curved girder / contraction / slow distortion / stress

引用本文

导出引用
李承君, 周世军. 顶推法施工的曲线连续梁桥截面实测应力分析[J]. 铁道工程学报, 2005, 22(2): 23-26
LI Cheng jun, ZHOU Shi-jun. ANALYSIS OF MEASURED STRESS ON SECTION OF CURVED CONTINUOUS BRIDGE CONSTRUCTED BY JACK-IN METHOD[J]. Journal of Railway Engineering Society, 2005, 22(2): 23-26
中图分类号: U443   

参考文献

[1]JTJ 023—85,公路钢筋混凝土及预应力钢筋混凝土桥涵设计 规范[S].
[2]周履,陈永春.收缩徐变[M].北京:中国铁道出版社,1994.
[3]李旭升等.斜拉桥施工监控中混凝土应力换算方法[J].兰州: 铁道学院学报,2001,(6):49-52.

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