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低预应力钢带箍加固钢筋混凝土柱抗震性能研究
引用本文:王海东,,周亮,邓沛航,盛旺成.低预应力钢带箍加固钢筋混凝土柱抗震性能研究[J].湖南大学学报(自然科学版),2014,41(2):19-25.
作者姓名:王海东    周亮  邓沛航  盛旺成
作者单位:(1. 湖南大学 土木工程学院,湖南 长沙410082; 2. 湖南大学 建筑安全与节能教育部重点实验室,湖南 长沙410082; 3. 上海建为建筑工程有限公司,上海201315)
摘    要:对3根采用低预应力钢带箍约束加固的钢筋混凝土柱及2根对比柱进行拟静力试验,研究较高轴压比下加固柱的抗震性能.试验主要参数为轴压比和钢带箍的布置,通过试验研究了约束柱和对比柱的承载力、滞回特性和延性等重要抗震性能指标.试验结果表明,横向低预应力钢带箍能够有效抑制较高轴压比下约束柱斜向裂缝的发展,扩大塑性铰的范围,提高柱的变形能力,使得约束柱抗震性能得到较大程度提高.

关 键 词:预应力钢带箍    横向加固  轴压  抗震性能

Seismic Performance of RC Columns Confined by Low-prestressed Steel Belts
Abstract:Three circular columns confined by low-prestressed steel belts and two normal columns were tested under axial load and cyclic lateral force, and the bearing capacity, hysteretic behavior and ductility were examined. The main parameters were the axial compression ratio and the arrangement of steel belts. Test results indicate that the seismic performance of the RC columns confined by low-prestressed steel belts was greatly improved because the development of oblique cracks was inhibited, and with the greater range of the plastic hinge region, the deformability of confined columns was enhanced.
Keywords:prestressed steel belt  transverse reinforcement  axial compression  seismic performance
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