| 基于线性规划理论的大跨径悬臂浇筑拱桥施工阶段临时预应力效应分析 |
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| 引用本文： | 熊兴兵,周旭,王祺顺,田仲初,吴欣.基于线性规划理论的大跨径悬臂浇筑拱桥施工阶段临时预应力效应分析[J].公路工程,2021(1). |
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| 作者姓名： | 熊兴兵 周旭 王祺顺 田仲初 吴欣 |
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| 作者单位： | 贵州高速公路集团有限公司;湖南省交通科学研究院有限公司交通建设工程湖南省重点实验室;长沙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(51478049);贵州省交通运输厅科技项目(2019-122-004);湖南省交通科技项目(201518)。 |
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| 摘 要： | 基于线性规划理论,通过matlab求解了索力、临时预应力及拱圈应力之间的影响系数,得到了满足约束条件的最小预应力数量,并将其导入有限元模型中进行对比分析,计算结果表明:临时预应力可显著降低拱圈截面应力峰值、实现扣锚索索力的“重分配”、降低扣塔高应力区域,有利于保证结构施工安全。
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| 关 键 词： | 线性规划理论 索力 临时预应力 拱圈截面应力 |
Analysis of Temporary Prestressing Effect in Construction Stage of Large Span Cantilever Casting arch Bridge Based on Linear Programming Theory |
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| XIONG Xingbin,ZHOU Xu,WANG Qishun,TIAN Zhongchu,WU Xin.Analysis of Temporary Prestressing Effect in Construction Stage of Large Span Cantilever Casting arch Bridge Based on Linear Programming Theory[J].Highway Engineering,2021(1). |
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| Authors: | XIONG Xingbin ZHOU Xu WANG Qishun TIAN Zhongchu WU Xin |
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| Institution: | (Guizhou Expressway Group Co.,Ltd Guiyang,Guizhou 550000,China;Hunan Communications Research Institute Co.,Ltd Hunan Provincial Key Laboratory of Traffic Construction Engineering Changsha,Hunan 410015,China;Changsha University of Science and Technology,School of Civil Engineering,Changsha,Hunan 410114,China) |
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| Abstract: | Based on the linear programming theory,the influence coefficient between cable force,temporary prestress and arch ring stress is solved by matlab.The minimum prestress quantity that satisfies the constraint condition is obtained and imported into the finite element model for comparative analysis.It shows that the temporary prestressing can significantly reduce the peak stress of the arch ring section,realize the“redistribution”of the anchoring cable force,and reduce the high stress area of the buckle tower,which is beneficial to ensure the safety of structural construction. |
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| Keywords: | linear programming theory cable force temporary prestress arch ring section stress |
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