| 曲线梁桥最大悬臂施工状态下的可靠性分析 |
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| 引用本文： | 李生勇,张哲,黄才良,朱彬.曲线梁桥最大悬臂施工状态下的可靠性分析[J].武汉理工大学学报(交通科学与工程版),2008,32(3). |
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| 作者姓名： | 李生勇 张哲 黄才良 朱彬 |
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| 作者单位： | 1. 福州大学土木工程学院,福州,350108;大连理工大学土木水利学院,大连,116023
2. 大连理工大学土木水利学院,大连,116023 |
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| 摘 要： | 对一座73.0 m 110 m 73.0 m三跨预应力混凝土连续曲线梁桥在最大悬臂施工状态下的主梁抗倾覆整体失稳可靠度进行了分析.计算结果表明,梁体的抗倾覆稳定性满足安全性要求.建立了直桥模型(忽略平曲线)并与实际计算模型相比较.通过比较分析可知,桥梁平面曲线对梁体抗倾覆稳定性的影响十分显著,忽略曲线的影响会导致计算结果不安全.通过对随机变量在不同变异系数下可靠指标的计算可知,临时固结措施中的钢筋与永久墩之间距离的变异系数对可靠指标的影响较其他随机变量尤为重要.
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| 关 键 词： | 曲线梁桥 悬臂施工 抗倾覆稳定性 变异系数 可靠度 |
Stability Reliability Analysis of A Curved Bridge in Cantilever Construction |
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| Li Shengyong,Zhang Zhe,Huang Cailiang,Zhu Bin.Stability Reliability Analysis of A Curved Bridge in Cantilever Construction[J].journal of wuhan university of technology(transportation science&engineering),2008,32(3). |
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| Authors: | Li Shengyong Zhang Zhe Huang Cailiang Zhu Bin |
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| Abstract: | A curved continuous prestressed concrete bridge with three spans(73.5 m 110 m 73.5 m) is analyzed for its global overturning stability reliability at the construction phase of maximum cantilever.The bridge is safe enough at this phase and the results also show that the horizontal curves have significant effect on the overturning reliability.By computing coefficient variations of random variables,it is found that the variation coefficient of distance between the location of steel bars in the temporary rigid connection and the central axis of the pier has more notable effect on the reliability than other variables. |
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| Keywords: | curved bridge cantilever construction overturning stability variation coefficient reliability |
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