型钢外包活性粉末混凝土柱偏压性能试验研究  

Experimental Study on Steel Reinforced Reactive Powder Concrete Columns under Eccentric Loading

作　　者：卜良桃[1] 姚江 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湘潭大学自然科学学报》2017年第3期18-23,共6页Natural Science Journal of Xiangtan University

基　　金：国家火炬计划(2013GH561393)

摘　　要：提出一种由型钢外包活性粉末混凝土(RPC)组成且不配置纵向受力钢筋的新型组合柱.为研究这种组合柱在偏心荷载作用下的受力性能和破坏形态,设计了3根不同RPC强度等级的型钢外包RPC组合柱进行偏心受压试验,观察其受力破坏过程及破坏形态.试验结果表明:型钢外包RPC偏压柱具有较强的变形能力,在偏心距为60mm的偏心荷载作用下表现为大偏心受压破坏;型钢外包RPC偏压柱的极限承载力主要与RPC强度等级有关,且随RPC强度等级的提高而增大.最后,参照型钢普通混凝土组合柱极限承载力的计算方法,建立了型钢外包RPC偏心受压组合柱的极限承载力计算公式.Steel reinforced reactive powder concrete composite column is proposed, which doesn’t contain longi tudinal reinforcement . 3 specimens are designed to test the mechanical propert ies and fai lure modes of this kind of composite columns under eccentric loading. Test results show that steel reinforced RPC columns have excellent deformat ion performance. The specimens show large eccentric fai lure under eccentric loading at the eccent ricity of 60 mm. The ul t imate bearing capacity of composite columns is related primari ly to the st rength of RPC, and it increases along wi th the increase of st rength of RPC. At last, the calculat ion for-mula of ul t imate bearing capacity of steel reinforced RPC column is bui lt, based on the calculat ion formula of ul t imate bearing capacity of steel reinforced concrete column.

关 键 词：活性粉末混凝土(RPC) 组合柱 大偏心受压 破坏形态 承载力 

分 类 号：TU398[建筑科学—结构工程]