| 引用本文: | 刘亚双,李振宝,马华,王倩倩.新型CFST柱-RC梁节点抗震性能试验[J].哈尔滨工业大学学报,2020,52(8):20.DOI:10.11918/201908037 |
| LIU Yashuang,LI Zhenbao,MA Hua,WANG Qianqian.Experimental study on seismic performance of a new type of CFST column-RC beam joint[J].Journal of Harbin Institute of Technology,2020,52(8):20.DOI:10.11918/201908037 |
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| 摘要: |
| 结合钢管混凝土（CFST）柱和钢筋混凝土（RC）梁各自的优点,提出一种采用U形钢板-栓钉组合连接的新型CFST柱-RC梁节点.为研究新型节点的抗震性能,设计并制作了2个足尺CFST柱-RC梁节点及1个传统的RC节点试件,对其进行了低周往复荷载作用下的试验研究.结果表明:该类新型CFST柱-RC梁节点破坏模式与传统的RC节点相似,均发生梁端弯曲破坏,破坏区域主要在U形连接板外,实现塑性铰外移.按照试验现场的试件安装位置,十字节点的梁分别命名为S梁和N梁.CFST中柱节点、CFST边节点N梁承载力较RC节点分别提高11.6%（负向提高13.0%）和5.3%（负向提高7.5%）；中柱节点的S梁承载力提高20.2%（负向提高19.6%）.荷载-位移曲线饱满,累计耗能与RC节点相比提高约17.0%（S梁提高36.0%）、20.1%,各试件的位移延性系数均大于4.0,新型CFST柱-RC梁中柱节点、边节点的位移延性系数分别提高2.4%、21.3%,具有较好的变形能力. |
| 关键词: 钢管混凝土柱 钢筋混凝土梁 U形钢板-栓钉组合连接 低周往复荷载试验 抗震性能 |
| DOI：10.11918/201908037 |
| 分类号:TU375 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2016YFC0701100) |
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| Experimental study on seismic performance of a new type of CFST column-RC beam joint |
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LIU Yashuang1,LI Zhenbao1,MA Hua1,WANG Qianqian2
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(1.The Key Lab of Urban Security and Disaster Engineering (Beijing University of Technology), Ministry of Education, Beijing 100124, China; 2.College of Exploration Technology and Engineering, Hebei GEO University, Shijiazhuang 050031, China)
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| Abstract: |
| Based on the advantages of concrete filled steel tube (CFST) column and reinforced concrete (RC) beam, a new type of CFST column-RC beam joint connected by U-shaped steel plate and studs is proposed in this paper. In order to study the seismic performance of the new type of joint, two full-scale CFST column-RC beam joints and one traditional RC joint were designed and manufactured, and the low-cycle reciprocating load test was carried out. Results show that the failure mode of the CFST column-RC beam joint was similar to that of the traditional RC joint that both of the joints had flexural failure at beam ends. The failure area was mainly outside the U-shaped steel plate edge, and the plastic hinge area moved outwards. The beams of the cross joint were named as S beam and N beam according to the specimen installation positions of the test site. Compared with the RC joint, the bearing capacity of the N beam of CFST column interior joint and side joint increased by 11.6% (13.0% in negative direction) and 5.3% (7.5% in negative direction) respectively, and that of the S beam of the CFST column interior joint increased by 20.2% (19.6% in negative direction). The load-displacement hysteresis curves showed a plump shape. The accumulative energy dissipation of the CFST column interior joint and side joint increased by 17.0% (36.0% for S beam) and 20.1% compared with the RC joint. The displacement ductility coefficient of each specimen was higher than 4.0, and that of the interior joint and side joint of the CFST column-RC beam increased by 2.4% and 21.3%. Therefore, the new type of CFST column-RC beam joint showed good deformation ability. |
| Key words: CFST column RC beam U-shaped steel plate-studs connection low-cycle reciprocating load test seismic performance |
