\r杨熠明¹，杨 溥^{1, 2}，高浩捷³，蔡 森⁴，沈培文\r¹\r
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AuthorsHTML:\r杨熠明¹，杨 溥^{1, 2}，高浩捷³，蔡 森⁴，沈培文\r¹\r
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AuthorsListE:\rYang Yiming¹，Yang Pu^1，2，Gao Haojie³，Cai Sen⁴，Shen Peiwen\r¹\r
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AuthorsHTMLE:\rYang Yiming¹，Yang Pu^1，2，Gao Haojie³，Cai Sen⁴，Shen Peiwen\r¹\r
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Unit:\r1. 重庆大学土木工程学院，重庆 400045；
2. 山地城镇建设与新技术教育部重点实验室(重庆大学)，重庆 400045；
3. 华润置地(湖南)有限公司，长沙 410199；4. 香港华艺设计顾问(深圳)有限公司，深圳 518057\r
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Unit_EngLish:\r1. School of Civil Engineering，Chongqing University，Chongqing 400045，China；
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University)，Chongqing 400045，China；
3. China Resources Land(Hunan) Co.，Ltd.，Changsha 410199，China；
4. Hong Kong Huayi Design Consultants(Shenzhen) Co.，Ltd.，Shenzhen 518057，China\r
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Abstract_Chinese:\r 自复位RC框架柱脚节点将无黏结预应力钢筋与新型金属消能阻尼器结合，在保证结构足够的承载力和耗能能力的前提下，能有效减小传统框架结构水平地震作用下产生的残余变形．对2个采用了新型可更换阻尼器的自复位RC框架柱脚节点进行了低周往复荷载抗震试验，对比分析了不同轴压比下框架柱脚节点的受力机制、滞回曲线、耗能能力、复位能力等性能．试验结果表明：自复位RC框架柱脚节点的耗能主要来自阻尼器的屈服耗能，不同轴压比下该框架柱脚节点的耗能能力大致相当；高轴压比导致框架柱产生轻微的塑性变形，从而使残余变形增大，相应的复位能力略有降低．
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Abstract_English:\r\r\rSelf-centering\r(\rSC\r)\rRC frame column base joints can effectively reduce residual drift under horizontal seismic action with unbonded prestressed reinforcements and energy-dissipating dampers\r，\rin which unbonded prestressed reinforcements are compared with traditional RC frame and energy-dissipating dampers provide the energy dissipation capacity\r．\rTwo specimens of SCRC frame column base joints with a new type of replaceable damper were designed and tested under cyclic horizontal loading\r．\rThe mechanical behavior\r，\rhysteretic curve\r，\renergy dissipation capability\r，\rand SC capacity of the SCRC frame column base joints with different axial compression ratios were investigated\r．\rThe energy dissipation capacities of the SCRC-frame column base joints with different axial compression ratios were found to be nearly the same because they were provided by the dampers\r．\rMoreover\r，\rthe residual drift of the SCRC frame column base joints with high axial compression ratio is large and the SC capacity is slightly reduced\r\r．\r\r
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Keyword_Chinese:自复位柱脚节点；轴压比；复位能力；残余变形；抗震性能\r

Keywords_English:self-centering column base joint；axial compression ratio；self-centering capacity；residual drift；seismic behavior\r


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