大跨度桥梁施工控制影响参数

发布时间：2018-05-28 00:13

本文选题：桥梁 + 三维模型　；参考：《土木建筑与环境工程》2015年S2期

【摘要】：施工控制是建筑建筑产业现代化的重要体现之一。为使连续刚构桥成桥状态的线形符合技术要求,桥梁的施工控制是不可或缺的措施。针对大跨度连续刚构桥施工控制的特点,运用软件进行仿真模拟,进行了悬臂施工过程主要参数的敏感性分析,并据此来判定结构对参数的灵敏程度,为施工过程的参数调整提供相应依据,为建筑产业化提供支持。分别对比了在容重变化、混凝土预应力参数和整体升温降温等情况下,连续刚构桥主梁挠度在最大悬臂状态和成桥状态时变化趋势。结果表明,最大悬臂状态下的温度梯度对挠度影响最大,变化峰值可达60mm。容重也对挠度有显著影响,两种状态下挠度变化峰值均在10~25mm之间。
[Abstract]:Construction control is one of the important embodiment of construction industry modernization. In order to make the alignment of continuous rigid frame bridge meet the technical requirements, bridge construction control is an indispensable measure. According to the characteristics of construction control of long-span continuous rigid frame bridge, the sensitivity analysis of the main parameters of cantilever construction process is carried out by using software simulation, and the sensitivity degree of structure to parameters is determined. To provide the corresponding basis for the parameter adjustment of the construction process, and to provide the support for the construction industrialization. The variation trends of deflection of the main beam of continuous rigid frame bridge under the condition of the maximum cantilever state and the bridge state are compared under the condition of the change of bulk density, the parameters of concrete prestress and the whole heating and cooling. The results show that the temperature gradient in the maximum cantilever state has the greatest effect on the deflection, and the peak value can reach 60 mm. Bulk density also has a significant effect on the deflection. The peak value of deflection changes in both states is between 10~25mm.
【作者单位】：北京建筑大学工程结构与新材料北京市高等学校工程研究中心;
【基金】：国家自然基金(51178042) 北京市自然科学基金(8142012)
【分类号】：U445.4

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