| 底板横向裂缝对箱梁强度及刚度影响模拟分析 |
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| 引用本文： | 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(6). |
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| 作者姓名： | 张兆宁 贺拴海 赵煜 |
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| 作者单位： | 长安大学公路学院;兰州理工大学土木工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50908017) |
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| 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.
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| 关 键 词： | 箱梁 裂缝 模拟 强度 刚度 |
Analysis of the Influence of Transverse Cracks of Bottom Slab for Box Girder Strength and Stiffness |
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| ZHANG Zhao-ning,HE Shuan-hai,ZHAO Yu.Analysis of the Influence of Transverse Cracks of Bottom Slab for Box Girder Strength and Stiffness[J].Journal of Zhengzhou University: Eng Sci,2011(6). |
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| Authors: | ZHANG Zhao-ning HE Shuan-hai ZHAO Yu |
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| Affiliation: | ZHANG Zhao-ning1,2,HE Shuan-hai1,ZHAO Yu1 (1.School of Highway,Chang'an University,Xi'an 710064,China,2.School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China) |
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| Abstract: | Cracks and other damage problem are often found in some parts of pre-stressed concrete continuous box girder bridge,which has a direct iMPact on the usability,durability and security of the bridge.In order to find out the change regularity of the strength and stiffness for the damaged bridge and provide the basis for the safety assessment,repair and reinforcement of damaged bridge,the paper establishes the finite element model and analyzes the strength and stiffness condition under different parameters,such... |
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| Keywords: | box girder crack simulation strength stiffness |
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