| 倒置外露灌浆套筒连接的不同轴压比柱脚节点抗震性能试验研究 |
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| 引用本文： | 乔德浩,王少杰,庞加宝,胡兆文,黄兴淮.倒置外露灌浆套筒连接的不同轴压比柱脚节点抗震性能试验研究[J].世界地震工程,2021,0(1):122-128. |
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| 作者姓名： | 乔德浩 王少杰 庞加宝 胡兆文 黄兴淮 |
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| 作者单位： | 1. 山东农业大学 水利土木工程学院,山东 泰安 271018;2. 山东德建集团工程技术研究院,山东 德州 253000;3. 东南大学 土木工程学院,江苏 南京 210096 |
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| 摘 要： | 为了解决传统内置灌浆套筒竖向连接施工过程不可视和灌浆质量可控性差，提出“灌浆后再二次封边”的倒置外露钢筋灌浆套筒连接方法。通过设计制作3个截面尺寸为400 mm×400 mm的足尺试件，采用竖向荷载作用下的低周往复荷载试验，研究了该新型装配柱脚节点在不同轴压比作用下的抗震性能。结果表明:不同轴压比作用下各装配柱脚节点试件灌浆套筒均完好；伴随轴压比增大，柱脚节点区塑性铰上移，柱身开裂高度上升；柱脚节点开裂与极限荷载均随轴压比增大而增大，但延性系数随轴压比的增大而降低（试件S1、S2和S3对应的延性系数分别是3.08、2.77和2.56）并且刚度退化进程缩短；伴随轴压比增大开裂位移角变大和极限位移角变小，最小值分别为1/479、1/35，均大于规范限值，满足抗震设计要求。建议装配柱脚节点应适度延长柱端箍筋加密区范围，深化柱脚节点区受力机制的研究。
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| 关 键 词： | 灌浆套筒 装配式混凝土结构 柱脚节点 轴压比 抗震性能 |
Experimental study on seismic performance of column foot joints connected by inverted exposed grouting sleeve under different axial compression ratios |
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| QIAO Dehao,WANG Shaojie,PANG Jiabao,HU Zhaowen,HUANG Xinghuai.Experimental study on seismic performance of column foot joints connected by inverted exposed grouting sleeve under different axial compression ratios[J].World Information On Earthquake Engineering,2021,0(1):122-128. |
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| Authors: | QIAO Dehao WANG Shaojie PANG Jiabao HU Zhaowen HUANG Xinghuai |
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| Institution: | 1. School of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai’an 271018, China;2. SDDJ Research Institute of Engineering Technologies, Dezhou 253000, China;3. College of Civil Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | In order to solve the problem that the construction process of the traditional built-in grouting sleeve vertical connection is not visible and its grouting quality is not controllable, an inverted exposed reinforced grouting sleeve connection method based on the "secondary edge sealing after grouting" is proposed. In this study, a low cycle reversed load test under different axial compression ratios is carried out. Three full-scale specimens with a section size of 400 mm×400 mm are designed to investigate the seismic behavior of the assembled column base joint. The results show that the grouting sleeve of each assembled column foot joint specimen under different axial compression ratios is intact. With the increase of the axial compression ratio, the plastic hinge near the column foot joint moves up, and the cracking height of the column body rises. Meanwhile, the cracking and ultimate loads of the column base joints can also increase, but the ductility coefficient decrease (the ductility coefficients corresponding to S1, S2 and S3 are 3.08, 2.77 and 2.56, respectively), and the stiffness degradation is reduced. Moreover, as the axial compression ratio increases, the cracking drift angle increases while the ultimate drift angle decreases. The minimum values of the above drift angles are 1/479 and 1/35, respectively, which are all greater than the standard limit values and meet the requirements of seismic design. It is suggested that the range of stirrup densification area at column end should be extended appropriately, and the further in-depth research on the mechanical mechanism of column footing joints should be conducted. |
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| Keywords: | grouting sleeve assembled concrete structure column foot joint axial compression ratio seismic performance |
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