【摘要】 以大连国际会议中心工程中的核心筒边框柱脚与钢筋混凝土基础组合节点为原型,设计了3个1/5缩尺的钢管混凝土柱脚-不同配筋基础的组合试件,采用单向重复加载方式对其进行锚固工作性能试验,研究了相同柱脚埋深条件下不同基础配筋对组合试件锚固性能的影响.结果表明,在柱脚底部锚板之上增加1层水平分布配筋,能明显提高其锚固承载力和延性性能;增加竖向分布抗拔钢筋,可显著提高其承载力;3个试件原型的构造做法均可满足设计要求,其锚固是可靠的.更多还原

【Abstract】 Composite core walls with concrete filled steel tubes(CFT) composite column borders are the main structure of Dalian Conference Center.Ensuring the anchorage reliability between the CFT column and the concrete foundation is one of the key technologies in seismic design.According to the engineering structure,three 1/5 scale specimens of CFT column base bedded in concrete foundation were made,and the experiments under cyclic loading were carried out.Through the experiments,the effect of foundation reinforcement on anchorage performance of the specimen is studied.Results show that increasing horizontal distribution bar at the top of the anchor plate may improve the ultimate loads and ductility.Increasing anti-punching shear bar may effectively improve the ultimate loads.The anchorage performance of prototype of test specimen is reliable,and the construction methods in engineering can meet design requirements.更多还原