大跨半钢板混凝土屋盖的施工模拟与分析

发布时间：2018-04-03 17:35

本文选题：半钢板混凝土　切入点：数值模拟　出处：《工程力学》2015年S1期

【摘要】：半钢板混凝土(HSC)屋盖在施工时,先以钢板为混凝土浇筑的模板和支撑,此时混凝土和钢筋的重量及施工荷载均由钢板承担,待混凝土硬化与钢筋和钢板成为一体后,三者共同承受外力作用。该文采用生死单元和追踪单元技术模拟了这个施工过程。首先,建立了大跨半钢板混凝土组合梁的数值模型,对典型构件的试验进行了模拟,检验了结构建模的有效性和粘结滑移的影响。在此基础上应用生死单元和追踪单元技术对直接成型梁试件和分阶段叠合成型梁试件的力学性能进行了对比研究。结果表明,考虑施工过程的大跨半钢板混凝土梁在加载初期刚度和后期承载力略有减小,施工过程仅增加了最终的构件变形。最后,对屋盖体系进行了模拟,研究了该屋盖体系在正常使用状态下的受力和变形,为该类屋盖结构提供设计依据。
[Abstract]:In the construction of semi-steel concrete (HSC) roof, the steel plate is first used as the formwork and support for concrete pouring. At this time, the weight and construction load of the concrete and steel bar are borne by the steel plate, and after the concrete harden and the steel bar are integrated,The three bear the external force together.This paper simulates the construction process by using birth and death element and tracing unit technology.Firstly, the numerical model of long-span semi-steel plate concrete composite beam is established, and the experimental results of typical members are simulated, and the effectiveness of structural modeling and the effect of bond-slip are tested.On the basis of this, the mechanical properties of the directly formed beam specimen and the stagewise superimposed beam specimen were studied by using the birth and death element and tracing element technique.The results show that the stiffness and ultimate bearing capacity of the long-span semi-steel plate concrete beam are slightly reduced in the early stage of loading and the final deformation of the member is only increased during the construction process.Finally, the simulation of the roof system is carried out, and the stress and deformation of the roof system under the normal condition are studied, which provides the design basis for this kind of roof structure.
【作者单位】：北京工业大学工程抗震与结构诊治北京市重点实验室;
【基金】：国家自然科学基金项目(51208011) 北京市教委科研计划项目(KM201310005025) 国家博士后科学基金项目(2012M510301) 北京市博士后科研项目(2012ZZ-13)
【分类号】：TU755;TU765

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