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[1]姜增国,姜川,郭玉峰,等.预制混凝土T梁早期裂缝原因分析[J].武汉工程大学学报,2012,(05):23-26.[doi:103969/jissn16742869201205007]
　JIANG Zeng\|guo,JIANG Chuan,GUO Yu\|feng,et al.Investigation on crack effects of pre\|stressed concrete T\|beam at early stage based on finite element analysis[J].Journal of Wuhan Institute of Technology,2012,(05):23-26.[doi:103969/jissn16742869201205007]
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预制混凝土T梁早期裂缝原因分析(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2012年05期
页码:
23-26
栏目:
资源与土木工程
出版日期:
2012-05-31

文章信息/Info

Title:
Investigation on crack effects of pre\|stressed concrete T\|beam
at early stage based on finite element analysis
文章编号:
16742869(2012)05002304
作者:
姜增国1; 姜川2;  郭玉峰1; 黄涛1
1.武汉理工大学土木工程与建筑学院，湖北 武汉 430070;
2.中建三局总承包公司，湖北 武汉 430070
Author(s):
JIANG Zeng\|guo1;  JIANG Chuan2;  GUO Yu\|feng1;  HUANG Tao1
1.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070，China；
2.General Construction Company of CCTEB, Wuhan 430070，China
关键词:
预应力混凝土; T 梁; 裂缝; 性能评估
Keywords:
pre\|stressed concrete;  T\|beam;  crack;  performance assessment
分类号:
TU375.1
DOI:
103969/jissn16742869201205007
文献标志码:
A
摘要:
以某公路大桥施工过程中一榀跨径40 m的预应力混凝土T梁开裂的工程实际为例，采用有限元方法探讨了结构的损伤原因.采用有限元软件建立了该预应力T梁的有限元模型，分析计算了结构浇注后张拉前这段时间的受力情况.模拟了结构的时变温度效应及其对结构承载能力的影响.通过系统的参数分析研究了结构产生裂缝的原因、机理及裂缝的特征.研究表明浇筑温差及混凝土自身水化热引起的温度应力是导致结构出现裂缝的主要原因.研究结论对预应力混凝土T梁的裂缝防治提出了具有实际意义的方法，可以适用于其它类似结构的开裂分析.
Abstract:
A pre\|stressed concrete T\|beam with 40 m span of a highway bridge which cracked during construction stage was taken as the example to investigate the structural performance during the period of the pouring and stretching. The finite element method was applied to explore the reason for the crack expansion. The finite element model of the T beam was established with the aiding of the commercial package to investigate the structural stress distribution. The variations of structural performance induced by the time\|varying temperature change were computed. The parametric study was carried out to examine the reasons for the crack expansion and the properties of the crack distribution. The results indicate that the temperature change in the pouring process and the heat of the hydration may induce substantial thermal stresses, which is the major factor to induce the structural cracks. Some measures which are proposed to prevent the structural cracks of the pre\|stressed concrete T\|beam during construction stage in this study can be applied in the crack analysis of similar structures.

参考文献/References:

［1］陈萌．混凝土结构收缩裂缝的机理分析与控制［D］.武汉：武汉理工大学，2006.
［2］金贤玉，沈毅，李宗津．高强混凝土的早龄期特性试验研究［J］.混凝土与水泥制品，2003(5):5-7.
［3］李壁有．预应力混凝土T 型梁张拉前裂缝的成因与控制［J］.西部探矿工程，2007，19（2）：157-159.
［4］黄国兴，惠荣炎．混凝土的收缩［M］.北京：中国建筑工业出版社，1982.
［5］朱清江．高强高性能混凝土的研制与应用［M］.北京：中国建材工业出版社，1999.

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备注/Memo

备注/Memo:
收稿日期：20120221作者简介：姜增国(1960-),男，山东莱州人，教授，博士.研究方向:桥梁性能检测与评价.
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