摘要
研究了混凝土框架结构的施工过程对框架柱累积竖向变形的影响.基于逐层叠加法建立结构有限元模型,模拟施工过程中逐层施工的影响;基于梯形积分公式推导了混凝土收缩和徐变效应的数值迭代模型,建立了纤维杆模型的等效节点力,考虑混凝土时效特性的影响;分析了一座10层混凝土框架结构,研究不同施工周期对其混凝土框架柱累积竖向变形的影响,不同支撑刚度对累积竖向变形的影响.
This paper puts forward a numerical computational method for the construction of reinforced concrete structures to analyze the influence of construction procedures on columns＇ cumulative vertical deformation. Using this method, we analyze construction procedures by modeling them step-by-step, and simulate the effects of concretes＇ time-dependent behaviors by a numerical method deduced from trapezium integral formulas. These are illustrated through an analytical study of a ten-floored concrete frame structure, and both the influence of construction periods and the formwork system＇s stiffness on columns＇ cumulative vertical deformation have been discussed.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2008年第3期98-104,共7页
Journal of Central South University of Forestry & Technology
基金
国家自然科学基金资助项目(50678064)
湖南省建设厅重点资助项目(湘科20043160067)
关键词
土建工程
逐层建模
时效分析
混凝土
钢筋混凝土结构
施工期
civil engineering
modeling step-by-step
time-dependent
reinforced concrete structures
construction period
