钢板栓筋连接高强箍筋约束混凝土柱的抗震性能试验研究

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发布时间：2021-12-01

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］提出装配框架柱的一种新型连接型式———钢板栓筋连接型式。采用足尺模型，设计了 2 个钢板栓筋连接
高强箍筋约束混凝土柱和 2 个对比现浇普通箍筋柱。通过拟静力低周反复加载试验，并与现浇普通箍筋柱对比，
研究钢板栓筋连接高强箍筋约束混凝土柱的承载能力和抗震性能。观测了 4 个试件受力→变形→损伤→裂缝→
屈服的全过程，并分析各试件的破坏特征、滞回曲线、骨架曲线、刚度衰减、位移延性、耗能能力等。试验表明: 在相
同条件下，钢板栓筋连接高强箍筋约束混凝土柱具有与现浇普通箍筋柱相当的承载力，其抗震性能良好; 连接处采
用焊接及水平栓筋的钢板栓筋连接高强箍筋约束混凝土柱是可靠的。［关键词］高强螺旋箍筋; 约束混凝土; 装配式柱; 水平栓筋; 抗震性能
中图分类号: TU756. 4 + 1 文献标识码: A 文章编号: 1002-848X( 2014) 01-0042-07
Experimental research on seismic performance of the fabricated confined
concrete columns with steel plate and horizontal strengthened bars
Li Qingning1，Zhang Zhencheng1，Yu Qingrong2，Jiang Weishan1 ( 1 School of Civil Engineering，Xi'an University of Architecture and Technology，Xi'an 710055，China;
2 Architectural and Civil Engineering Institute，Tianjin University，Tianjin 300072，China)
Abstract: A new connection type of frame fabricated columns with steel plate and horizontal strengthened bars was
proposed． By using of the comparable full scale model test method，two new confined concrete columns with steel plate and
horizontal strengthened bars and two cast-in-site columns with plain stirrups were designed and constructed． Through the
pseudo-static test，the carrying capacity and seismic performance of the fabricated confined concrete column with steel plate
and horizontal strengthened bar were studied and compared with the cast-in-site columns with plain stirrups． The whole
process of deforming→damaging→cracking→yielding→failure was observed during the test． Damage characteristics，
hysteretic curves，skeleton curves，stiffness degradation，displacement ductility and energy dissipation capacity of the four
columns were discussed． The test results show that under the same condition，bearing capacity of the new fabricated
confined concrete columns with steel plate and horizontal strengthened bar is equal to the cast-in-site columns with plain
stirrups，and it also has good seismic performance． Junction of the new fabricated confined concrete columns with steel
plate and horizontal strengthened bar used welding and horizontal bar as its attended mode is reliable．
Keywords: high-strength spiral stirrup; confined concrete; fabricated column; horizontal strengthened bar; seismic
performance
* 国家自然科学基金项目 ( 10572107 ) ，河北省地方科技项目
( 2011188) 。
作者简介: 李青宁，教授，硕士，Email: lqn952@ 163． com。 0 引言建筑的现浇式施工模式工业化水平低、劳动强
度大、生产成本高，加之目前日益严峻的用工荒，已
经在很大程度上影响了我国建筑业的可持续发展。
工厂化、装配化、精细化的现代施工模式正成为建筑
业的发展趋势。近年来，装配整体式结构体系在国
内外得到了越来越多的重视和发展。
但是目前装配式框架的连接在不同程度上存在
着构造复杂、传力不直接、不易施工、造价较高等问
题［1，2］，而采用密置高强箍筋可以增强混凝土柱的
外部约束，限制混凝土的横向变形，进而有效改善核
心混凝土自身原有的受压特性，显著提高混凝土的
抗压强度和变形能力［3］。基于此，本文提出一种新
型装配整体柱———钢板栓筋连接高强箍筋约束混凝
土柱。其柱段采用高强箍筋约束混凝土构件，连接
采用钢板栓筋连接节点。具体构造过程为: 先将预
埋钢板焊在上、下柱的纵向钢筋上处，然后用外贴钢
板盖在上、下柱的预埋钢板上; 预埋钢板与外贴钢板
都在指定位置穿孔，用水平栓筋穿过钢板与混凝土
柱预留孔，末端与外贴钢板焊接，将上、下两段柱连
接成整体柱。