抗拔钢筋对提高混凝土承台-钢柱脚锚固承载力的研究

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英文篇名：Study on ultimate up-lift bearing capacity of steel column base embedded in concrete pile cap with anti-punching shear bar 中文刊名：世界地震工程 英文刊名：World Earthquake Engineering 作者：张晓新 ; 曹万林 ; 薛素铎 英文作者：ZHANG Xiao-xinCAO Wan-linXUE Su-duo(Beijing University of Technology ; Beijing 100022 ; China) 中文关键词：钢柱脚 ; 混凝土承台 ; 抗拔钢筋 ; 锚固性能 英文关键词：steel column base ; pile cap ; anti-punching shear bar ; anchorage performance 出版日期：2006-09-30 机构：北京工业大学,北京工业大学,北京工业大学 北京100022,北京100022,北京100022 年：2006 期：03 出版单位：世界地震工程

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 up-lift 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.

引文

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