| 大跨度连续刚构施工中悬臂长度与变形的关系研究 |
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| 引用本文： | 刘欣欣,古松,马骁. 大跨度连续刚构施工中悬臂长度与变形的关系研究[J]. 西华大学学报(自然科学版), 2018, 37(6): 73-78. DOI: 10.3969/j.issn.1673-159X.2018.06.013 |
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| 作者姓名： | 刘欣欣 古松 马骁 |
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| 作者单位： | 1.商洛学院城乡规划与建筑工程学院, 陕西 商洛 726000 |
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| 基金项目： | 四川省科技计划项目2017GZ0372 |
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| 摘 要： | 以苍溪县嘉陵江二桥主桥为对象，利用Midas Civil对施工过程进行模拟，分析连续刚构桥悬臂施工中悬臂长度对结构线形的影响。研究发现悬臂结构在自重和预应力荷载作用下会发生变形，在忽略时间因素情况下，当悬臂长度较短时，预应力荷载对结构挠度的影响大于自重的影响，结构会上挠；随着悬臂长度的增加，自重对挠度的影响越来越大，当达到4/5最大悬臂长度时，结构变形由上挠变为下挠。
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| 关 键 词： | 连续刚构 线形 悬臂 悬臂长度 挠度 |
| 收稿时间： | 2017-11-19 |
Research on Relationship Between Cantilever Length and Deformation in Long Span Continuous Rigid Frame Construction |
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| LIU Xinxin,GU Song,MA Xiao. Research on Relationship Between Cantilever Length and Deformation in Long Span Continuous Rigid Frame Construction[J]. Journal of Xihua University(Natural Science Edition), 2018, 37(6): 73-78. DOI: 10.3969/j.issn.1673-159X.2018.06.013 |
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| Authors: | LIU Xinxin GU Song MA Xiao |
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| Affiliation: | 1.College of Urban, Rural Planing and Architectural Engineering, Shangluo University, Shangluo 726000 China |
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| Abstract: | Based on the second bridge of jialing river bridge in cangxi county, Midas Civil was utilized to simulate the process of construction and we analyzed the influence rigid frame's continuous length on structural line in continuous rigid frame bridge's construction, It is found that the cantilever structure will be deformed under the action of self weight and prestressing force.In the case of ignoring the time factor, if the cantilever length is short the structure will bend upwards.Because the influence of prestressed load on deflection is greater than that of self-weight. As the length of the cantilever increases, the influence of self-weight on deflection is increasing. When reached 4/5 of the largest cantilever length, the structural deformation is changed from the top to the bottom. |
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