抗拔钢筋对提高混凝土承台-钢柱脚锚固承载力的研究  

Study on ultimate up-lift bearing capacity of steel column base embedded in concrete pile cap with anti-punching shear bar

作　　者：张晓新[1] 曹万林[1] 薛素铎[1] 

机构地区：[1]北京工业大学,北京100022

出　　处：《世界地震工程》2006年第3期131-135,共5页World Earthquake Engineering

摘　　要：在试验研究基础上,采用ANSYS有限元分析程序,对不同抗拔钢筋配筋率的混凝土承台-钢柱脚在单向加载下的性能进行了弹塑性计算分析。结果表明,随着抗拔钢筋配筋率提高,其抗拔承载力、后期刚度、耗能能力均比未配抗拔钢筋的混凝土承台-钢柱脚逐步提高,但其提高的比例逐渐趋慢。用承载力桁架模型对各混凝土承台-钢柱脚承载力进行了计算,结果与有限元计算结果符合较好。Nonlinear finite element analysis of pile caps of steel column base under unilateral load is carried out by ANSYS program in order to understand the enhance effect to ultimate up-lift bearing capacity of steel column base embedded in concrete pile cap with anti-punching shear bar. The results are revealed that the ultimate loads, the energy dissipation capacity and the stiffness in the final stage of the specimen with anti-punching shear bar is higher than that of the specimen without anti-punching shear bar. With the increasing of the reinforcement ratio of anti- punching shear bar, the ultimate up-lift bearing capacity is increased. But the increasing speed of the ultimate uplift bearing capacity is slower than that of the reinforcement ratio. ANSYS program＇s results agree well with the calculated results with the formula of truss mechanic model.

关 键 词：钢柱脚 混凝土承台 抗拔钢筋 锚固性能 

分 类 号：TU375.3[建筑科学—结构工程]