纤维增强异形柱节点受剪承载力分析  

Shearing capacity of fiber reinforced joints with special-shaped columns

作　　者：王铁成[1] 赵海龙[1] 

机构地区：[1]天津大学建筑工程学院/滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《江苏大学学报（自然科学版）》2011年第5期602-606,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50878141)

摘　　要：通过统计52个异形柱节点的拟静力试验结果,对现行《混凝土异形柱结构技术规程》的节点受剪承载力计算公式进行分析.结果表明:该规程节点受剪承载力公式用于异形柱结构设计,能够保证异形柱节点设计的安全且有较大安全储备,但公式的剪压比限值偏低.通过采用纤维增强的12个异形柱节点试验,提出了纤维增强异形柱节点受剪承载力公式,公式形式简单,可与现行《规程》计算公式衔接.计算结果表明:纤维增强异形柱节点受剪承载力公式的试验值与计算值比值均大于1,公式用于异形柱节点设计是偏安全的.纤维增强可提高异形柱节点的受剪承载力,减少节点核心区箍筋用量,解决节点区钢筋拥挤和节点薄弱的问题.According to the pseudo-static test of 52 joints with special-shaped columns,the shearing capacity formula which was from the actual Technical Specification for Concrete Structures with Special-shaped Columns was analyzed.The analysis results show that the formula in Specification is safe for the joints design of special-shaped column with high safety coefficient,but with low shear compression ratio.According to the test of 12 joints specimens with special-shaped columns with fiber reinforcement in core area,the shearing capacity formula was proposed.The formula is in simple form and is consistent with the formula in actual Specification.Calculation results indicate that the ratios of experimental value to calculated value are all higher than 1,which illuminates that the formula is safe for the design of joints with special-shaped column with slight high reliability.With fiber reinforcement,the shearing capacity of joints can be increased,and the quantity of stirrups can be decreased without the problems of steel bars congestion and joints weakness.

关 键 词：异形柱 节点 纤维 剪压比 受剪承载力 

分 类 号：TU375[建筑科学—结构工程]