施工期钢筋混凝土偏压构件承载力计算模型  

Bearing Capacity Calculation Model of Reinforced Concrete Bias Member During Construction Period

作　　者：胡晓鹏[1] 牛荻涛[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《土木工程与管理学报》2012年第2期5-9,共5页Journal of Civil Engineering and Management

基　　金：国家"十一五"科技支撑计划(2006BAJ03A02-03);陕西省自然科学基金(2012JQ7020)

摘　　要：由于混凝土强度和粘结性能的变化,施工期钢筋混凝土受压构件的承载力随龄期不断变化。研究施工期钢筋混凝土偏压构件的受力特征并建立承载力计算模型,为分析施工期钢筋混凝土结构的承载性能提供可靠的理论依据,对钢筋混凝土结构施工期的安全性分析与控制以及钢筋混凝土结构全寿命分析具有重要的理论意义和实际价值。通过对施工期钢筋混凝土偏压构件的数值模拟,分析了施工期钢筋混凝土偏压构件主要的受力特征。运用极限平衡理论,建立了施工期钢筋混凝土偏压构件承载力的计算模型,分析了施工期钢筋混凝土偏压构件承载力的时变规律,并验证了计算模型的合理性。结果表明:90天内偏压构件承载力快速增长,90天后承载力增长速度放缓逐渐。The bearing capacity of construction period reinforced concrete structures changes due to the change of bonding properties and concrete strength with concrete age.The force characteristics of construction period concrete bias members were Studying and the calculation model of bearing capacity was established,which can provide a reliable theoretical basis to analyze the bearing capacity of construction period reinforced concrete structure,and engineering application for the security control of reinforced concrete construction and the process life cycle analysis of reinforced concrete structures.The force characteristics of construction period reinforced concrete bias member are analyzed by finite element analysis.Combined with the limit equilibrium theory,the capacity calculation model of construction period RC bias member is established.The bearing capacity time-varying law of construction period reinforced concrete bias member is analyzed,and the rationality of the calculation model is validated.The results show that the bearing capacity of bias member rapidly grows in 90 days,the growth rate slows down gradually after 90 days.

关 键 词：施工期 偏压构件 材料性能 粘结性能 计算模型 

分 类 号：TU375[建筑科学—结构工程]