超长混凝土结构温度后浇带合理宽度的研究
Research on Rational Width of Post-Casting Temperature Band in Construction of Super-Long Reinforced Concrete Structures

作者: 潘立 :中国建筑科学研究院建筑结构研究所,北京;

关键词: 超长混凝土结构温度后浇带混凝土收缩应力截面平衡变形协调后浇带合理宽度Super-Long Concrete Structure Post-Casting Temperature Band of Concrete Structure in Construction Concrete Shrinkage Stress Cross-Section Balance Coordination Deformation Rational Width of Post-Casting Band

摘要:
在超长混凝土结构施工中,结构配筋通常连续横穿预留温度后浇带,使其宽度变化受阻并导致设计效能减弱或消失,此时如增加后浇带宽度可对其受损效能进行补偿。针对横穿后浇带钢筋不截断情况,基于截面平衡与变形协调原理,提出了确定温度后浇带合理宽度范围的新方法,推导了技术分析过程,给出了计算例题,可供超长混凝土结构设计与施工参考。

Abstract:
In construction of super-long concrete structures, the width change of reserved post-casting temperature band is limited generally by the steel bars across through the band, thus its design efficacy is weakened or disappeared. In this case, the lost efficacy can be compensated by increasing width of the post-casting band moderately. For the case of steel bars are not truncated or not overlapped at the band, based on the known principle of cross-section balance and coordination deformation, the new method to determine the rational width of post-casting band is proposed, then the analysis process and the calculation sample are shown as reference for structure design and construction.

文章引用: 潘立 (2013) 超长混凝土结构温度后浇带合理宽度的研究。 土木工程, 2, 171-175. doi: 10.12677/HJCE.2013.23030

参考文献

[1] GB50010-2010, 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010.

[2] 潘立. 横穿混凝土后浇带配筋对后浇带效能不利影响的计算分析[J]. 建筑结构, 2007, 37(7): 13, 14-16.

[3] 潘立. 导致混凝土后浇带失效的横穿钢筋最小配筋率研究[J]. 建筑科学, 2009, 25(11): 1-4.

[4] JGJ3-2010, 高层建筑混凝土结构技术规程[S]. 北京: 中国建筑工业出版社, 2010.

[5] GB50010-2002, 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2002.

[6] JGJ3-2002, 高层建筑混凝土结构技术规程[S]. 北京: 中国建筑工业出版社, 2010.

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