| 大跨径梁桥墩顶块空间应力数值分析及优化设计 |
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| 引用本文： | 李文华,贺拴海,翟晓亮,郭楠楠.大跨径梁桥墩顶块空间应力数值分析及优化设计[J].长安大学学报(自然科学版),2011(4):50-57. |
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| 作者姓名： | 李文华 贺拴海 翟晓亮 郭楠楠 |
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| 作者单位： | 长安大学公路学院;中交第一公路勘察设计研究院有限公司; |
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| 基金项目： | 国家西部交通建设科技项目(2011318812970); 国家自然科学基金项目(50908017) |
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| 摘 要： | 为了优化大跨径连续梁桥和连续刚构桥墩顶块的分析方法,对墩顶块几何尺寸的确定方法、预应力的模拟方法、荷载的施加方法、边界条件的选取进行了分析,并且通过参数分析提出了有效的解决方法。在此基础上,提出了考虑普通钢筋配筋率影响的允许应力增大系数法,明确了墩顶块三维有限元计算结果的判断方法;提出了墩顶块倒角优化设计方法和一种新型的墩顶块形式。研究结果表明:墩顶块顶板、底板和腹板应力增大系数参考值为1.05,横隔板为1.10,倒角为1.55;只要墩顶块有限元模型尺寸足够大,加载方式对墩顶块关心位置计算结果的影响可以忽略;对连续梁墩顶块而言,倾斜隔板墩顶块各部分应力峰值较竖直隔板墩顶块有了很大的改善。
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| 关 键 词： | 桥梁工程 连续梁 连续刚构 墩顶块 允许应力增大系数 优化设计 |
Numerical analysis and optimal design for block on pier top of long span beam bridge |
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| LI Wen-hua,HE Shuan-hai,ZHAI Xiao-liang,GUO Nan-nan.Numerical analysis and optimal design for block on pier top of long span beam bridge[J].JOurnal of Chang’an University:Natural Science Edition,2011(4):50-57. |
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| Authors: | LI Wen-hua HE Shuan-hai ZHAI Xiao-liang GUO Nan-nan |
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| Institution: | LI Wen-hua1,2,HE Shuan-hai1,ZHAI Xiao-liang1,GUO Nan-nan2(1.School of Highway,Chang'an University,Xi'an 710064,Shannxi,China,2.CCCC First Highway Consultants Co Ltd,Xi'an 710075,China) |
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| Abstract: | In order to optimize the analyzing method of block on the pier top of long span continuous beam bridge and continuous rigid frame bridge,the analysis method for size of geometric model,pre-stressing simulation method,loading method,boundary conditions simulation were presented.On the basis of numerical results,the effective practical analysis methods of block on pier top were obtained.Allowable stress intensification factor considering the effect of ratio of ordinary steel area to concrete was presented to ... |
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| Keywords: | bridge engineering continuous beam continuous rigid frame block on pier top allowable stress intensification factor optimal design |
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