单波1,2,王艺萤1,肖岩3,张长青1,4.胶合竹-混凝土组合梁RPC-钢复合连接件试验研究[J].湖南大学学报:自然科学版,2020,(1):66~75
胶合竹-混凝土组合梁RPC-钢复合连接件试验研究
Experimental Research on RPC-steel CompositeConnection for Glubam-concrete Composite Beams
  
DOI:
中文关键词:  组合梁  胶合竹  剪力连接件  活性粉末混凝土  推出试验
英文关键词:composite beams  laminated bamboo  shear connectors  reactive powder concrete (RPC)  push-out test
基金项目:
作者单位
单波1,2,王艺萤1,肖岩3,张长青1,4 (1. 湖南大学 土木工程学院湖南 长沙 410082 2. 建筑安全与节能教育部重点实验室(湖南大学)湖南 长沙 410082
3. 浙江大学 浙大-伊利诺大学联合学院
浙江 海宁 314400 4. 绿色先进土木工程材料及应用技术湖南省重点实验室湖南 长沙 410082) 
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中文摘要:
      针对现有凹槽连接件与销连接件性能上的不足,提出了一种适用于装配式胶合竹-混凝土组合梁的活性粉末混凝土(RPC)-钢复合连接件,复合连接件由带轴向开孔的螺杆外包RPC组成. 对6组复合连接件开展了推出试验,研究参数包括外包RPC厚度和螺杆直径. 获取了荷载-滑移曲线、抗滑移刚度、抗剪承载力等力学指标. 试验结果表明,外包RPC对复合连接件的抗滑移刚度有显著贡献,对抗剪承载力也有一定的提高作用,但复合连接件的抗剪承载力主要取决于螺杆直径. 相比于凹槽连接件,复合连接件的单位面积受力效率更高;相比于销连接件,复合连接件的抗滑移刚度显著提高. 复合连接件结合了凹槽连接高刚度与销连接高延性的优点,且便于现场装配,在性能上具有突出优势. 基于试验结果,提出了复合连接件的设计原则与尺寸范围.
英文摘要:
      The existing connections for glulam/bamboo-concrete composite(BCC) beam,including notched connection and dowel connection,exhibit performance deficiencies. Therefore,a new kind of connection,named as reactive powder concrete(RPC)-steel composite connection,was presented for prefabricated BCC beams in this paper,in which steel screw with an axial hole was covered by a layer of RPC. Total 6 groups of specimens were performed by push-out tests. The major mechanical properties such as the load-slip curves,shear capacity and shear stiffness were measured and then evaluated. The results showed that the RPC coat significantly improved the shear stiffness of composite connection and increased the shear capacity in a certain degree,while the shear capacity was mainly decided by the diameter of steel screw. Compared with the notched connection and dowel connection,the proposed connection has higher carrying efficiency per unit area and higher shear stiffness,respectively. Therefore,the RPC-steel composite connection combines the merits of high shear stiffness and high ductility from two conventional connections,and it is fit to prefabricated construction. Based on the test results,the design size of the proposed connection was also provided.
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