钢纤维增强异形柱框架节点受力性能试验研究  

EXPERIMENTAL RESEARCH ON MECHANICAL BEHAVIOR OF INTERIOR JOINTS OF SPECIALLY SHAPED COLUMN FRAMES REINFORCED BY STEEL FIBER

作　　者：戎贤[1,2] 张健新[1] 李燕君 李艳艳[1,2] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北省土木工程技术研究中心,天津300401 [3]邢台市建设工程造价管理站,河北邢台054000

出　　处：《工业建筑》2013年第5期47-51,共5页Industrial Construction

基　　金：河北省自然科学基金项目(E2011202013);河北省高等学校科学技术研究青年基金项目(Q2012083);河北省建设科技研究计划项目(2012-162)

摘　　要：为了解决异形柱框架节点的薄弱问题,对核心区应用钢纤维增强的异形柱框架中节点与同条件下未用钢纤维增强的异形柱框架中节点进行拟静力试验研究,对比分析异形柱框架中节点试件的破坏特征、中节点核心区的箍筋应变、混凝土应变及异形柱框架中节点的受剪性能,研究钢纤维增强的异形柱框架节点薄弱部位受力性能。研究结果表明:应用钢纤维增强的异形柱框架中节点试件的破坏特征得到改善;在异形柱框架节点核心区掺入钢纤维可以降低加载初期中节点核心区的箍筋应变,中节点腹板在平行于剪力方向的箍筋应变大于腹板垂直剪力方向的箍筋应变及翼缘处的箍筋应变;在中节点核心区掺入钢纤维可提高腹板混凝土的主拉应变和异形柱节点受剪承载力。To solve the weak part of joints with specially shaped column frames, the joint of specially shaped column frames reinforced by steel fiber and the one without reinforcement in the core zone were tested under low cyclic loading. The results in terms of damage characteristic, stirrup strain and concrete strain variation in the core area of joint and shear behavior of joint with specially shaped columns were compared in order to research the mechanical behavior of weak part of joints with specially shaped columns reinforced by steel fiber. It is shown that the damage characteristic of joint reinforced by steel fiber is improved. The stirrup strain of joint reinforced by steel fiber is lower at beginning loading. The stirrup strain in parallel to the direction of shear force in web of joint with specially shaped columns is higher than that of in perpendicular and that of in the flange. The tensile strain for concrete in web and the shear capacity of joint reinforced by steel fiber are higher than that of without reinforcement.

关 键 词：异形柱 中节点 钢纤维 受力性能 

分 类 号：TU375.4[建筑科学—结构工程]