[1]张兆宁,贺拴海,赵煜..底板横向裂缝对箱梁强度及刚度影响模拟分析[J].郑州大学学报(工学版),2011,32(06):18-21.
　ZHANG Zhao-ning,HE Shuan-hai,ZHAO Yu.Analysis of the Influence of Transverse Cracks of Bottom Slab for Box GirderStrength and Stiffness[J].Journal of Zhengzhou University (Engineering Science),2011,32(06):18-21.
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底板横向裂缝对箱梁强度及刚度影响模拟分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
32
期数:
2011年06期
页码:
18-21
栏目:
出版日期:
2011-11-10

文章信息/Info

Title:
Analysis of the Influence of Transverse Cracks of Bottom Slab for Box GirderStrength and Stiffness
作者:
张兆宁; 贺拴海; 赵煜.
长安大学公路学院,陕西西安710064;兰州理工大学土木工程学院,甘肃兰州730050, 长安大学公路学院,陕西西安,710064
Author(s):
ZHANG Zhao-ning1; HE Shuan-hai1; ZHAO Yu1
1.Sehool of Highway , Chang’ an University，Xi’ an 710064，China; 2. School of Civil Engineering，Lanzhou University ofTechnology ，Lanzhou 730050，China
关键词:
箱梁;  裂缝;  模拟;  强度;  刚度
Keywords:
box girder; crack; simulation;  strength;  stiffness
分类号:
TU448.23
文献标志码:
A
摘要:
预应力混凝土连续箱梁一些部位经常出现不同程度的开裂损伤等问题,它已直接影响到桥梁的使用性、耐久性及安全性为了准确掌握开裂情况下梁体强度及刚度的变化规律,为既有桥梁安全性能评定、修复加固提供依据.为此,以某一预应力混凝土连续刚构桥为例,分别以箱梁底板裂缝开展宽度、高度、条数为参数,模拟分析了各参数变化对梁体应力及挠度的影响程度.分析结果表明,箱梁结构性能随着裂缝宽度的增大、高度的上升、条数的增加而逐渐下降.在裂缝特征参数中,裂缝宽度变化对梁体强度及刚度的影响程度最大,裂缝高度及条数对其影响相对较小,其中后两者对梁体的影响程度基本相当.
Abstract:
Cracks and other damage problem are often found in some parts of pre-stressed concrete continuousbox girder bridge,which has a direct iMPact on the usability,durability and security of the bridge. In order tofind out the change regularity of the strength and stiffness for the damaged bridge and provide the basis for thesafely assessment,repair and reinforcement of damaged bridge, the paper establishes the finite element modeland analyzes the strength and stiffness condition under different parameters,such as cracks width,cracksheight and cracks number of the bottom slab of a pre-stressed concrete continuous rigid frame bridge. The a-nalysis result shows that the bearing capacity of the damaged bridge decreases with the increase of crackswidth,cracks height and cracks number. Among parameters of cracks,more cracks width than other two pa-rameters has an effect on the strength and stiffness of the damaged bridge.Cracks height and number affect thebearing capacity of the damaged bridge equally.

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更新日期/Last Update: 1900-01-01