Failure Mechanism and Shear Capacity of Organic Polymer Shear Connectors
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摘要: 为了解决金属剪力键存在初始裂缝、焊接残余应力、剪应力传递不均匀等缺陷,进行了有机聚合物非金属剪力键代替传统金属剪力键的研究.采用推出试验方法,设计、制作并测试了8组试件(共24个试件),在考虑有机聚合物剪力键的粘结厚度、弹性模量及界面处理工艺等影响参数的基础上,研究了这类剪力键的破坏机理和极限承载能力,同时,提出了预测界面极限抗剪承载能力的计算公式.研究结果表明:有机聚合物与混凝土共同被剪坏是主要的破坏形式;非金属剪力键界面极限剪应力分布在1.10~2.47 MPa之间,非金属剪力键与金属剪力键具有同等能力的界面抗剪水平.Abstract: In order to deal with several weaknesses of metal shear connectors such as original crack, welding residual stress and transfering shear capacity intermittently, the performance of organic polymer shear connectors was introduced to study. Eight sets specimens (total 24 specimens) with different adhesive thickness, Young's modulus and interface roughness of organic polymer shear connectors were investigated by push-out test, the ultimate shear capacity and the failure modes were also observed. Considering the main influence factors such as the adhesive thickness, Young's modulus and interface roughness of organic polymer shear connectors, an computational formula on the ultimate shear capacity was proposed. The results show that: organic polymer and concrete sheared together is the main damage form; ultimate shear capacity of organic polymer shear connectors is between 1.10 and 2.47 Mpa,the analysis and test results both show that the shear capacity of metal and organic polymer shear connectors is the same.
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Key words:
- organic polymer shear connectors /
- push-out test /
- failure mode /
- ultimate shear capacity
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ZONA A, RANZI G. Shear connection slip demand in composite steel-concrete beams with solid slabs[J]. Journal of Constructional Steel Research, 2014, 102(11): 266-281. SOTY R, SHIMA H. Formulation for maximum shear force on L-shape shear connector subjected to strut compressive force at splitting crack occurrence in steel-concrete composite structures[J]. Engineering Structures, 2013, 46(1): 581-592. MALEKI S, BAGHERI S. Behaviour of channel shear connectors. part Ⅰ: experimental study[J]. Journal of Constructional Steel Research, 2008, 64(12): 1333-1340. LARBI S A, FEFFIER E, JURKIEWIEZ B, et al. Static behavior of steel concrete beam connected by bonding[J]. Engineering Structures, 2007, 29(6): 1034-1042. BOUAZAOUI L, JURKIEWIEZ B, DELMAS Y, et al. Static behaviour of a full-scale steel-concrete beam with epoxy-bonding connection[J]. Engineering Structures, 2008, 30(7): 1981-1990. JURKIEWIEZ B, MEAUD C, FERRIER E. Non-linear models for steel-concrete epoxy-bonded beams [J]. Journal of Constructional Steel Research, 2014, 100(1): 108-121. 杨文瑞,何雄君,代力. CFRP锚杆与环氧树脂的耐久性试验研究[J]. 武汉理工大学学报,2014,36(11): 93-96. YANG Wenrui, HE Xiongjun, DAI Li. Experimental study the durability of CFRP anchor and epoxy resin[J]. Journal of Wuhan University of Technology, 2013, 36(11): 93-96. 李保亮,丁百湛,黄国君,等. CFRP嵌入式加固砌体结构抗弯性能试验研究[J]. 新型建筑材料,2014,41(9): 91-94. LI Baoliang, DING Baizhan, HUANG Guojun, et al. Experimental study of out-of-plane flexural performance of masonry structures strengthened with near-surface mounted carbon fiber reinforce polymer[J]. Journal of New Construction Material, 2014, 41(9): 91-94. Civil Engineering and Building Structures Standards Committee to Technical Committee.BS5400: steel, concrete and composite bridge, Part 5: code of practice for design of composite bridge[S]. London: British Standards Institution, 1988. BERTHET J F, YURTDAS I, DELMAS Y, et al. Evaluation of the adhesion resistance between steel and concrete by push out test[J]. International Journal of Adhesion and Adhesives, 2011, 31(2): 75-83. GARBACZ A, COURAD L, KOSTANA K. Characterization of concrete surface roughness and its relation to adhesion in repair systems[J]. Materials Characterization, 2006, 56(4/5): 281-289. LI A, KRISTER C. Push-out tests on studs in high strength and normal concrete[J]. Journal of Constructional Steel Research, 1996, 36(1): 15-29. 宗周红,车惠民. 剪力连接件静载和疲劳试验研究[J]. 福州大学学报:自然科学版,1999,27(6): 61-66. ZONG Zhouhong, CHE Huimin. Experimental study of shear connector under static and fatigue loading[J]. Journal of Fuzhou University: Natural Science, 1999, 27(6): 61-66. SCOTT A C, PRABHJEET S. Behavior of shear studs subjected to fully reversed cycle loading[J]. ASCE, Journal of Structural Engineering, 2003, 129(11): 1466-1474. ISABEL V, PAULO J S C. Experimental analysis of perfobond shear connection between steel and lightweight concrete[J]. Journal of Constructional Steel Research, 2004, 60(3/4/5): 465-479. SHIM C S, LEE P G, YOON T Y. Static behavior of large stud shear connectors[J]. Engineering Structures, 2004, 26(12): 1853-1860. LEE P G, SHIM C S, CHANG S P. Static and fatigue behavior of large stud shear connectors for steel-concrete composite bridge[J]. Journal of constructional steel research, 2005, 61(9): 1270-1285. LAM D. Capacities of headed stud shear connectors in composite steel beams with precast hollowcore slabs[J]. Journal of Constructional Steel Research, 2007, 63(9): 1160-1174. XUE D Y, LIU Y Q, YU Z, et al. Static behavior of multi-stud shear connectors for steel-concrete composite bridge[J]. Journal of Constructional Steel Research, 2012,74(8): 1-7. XU C, SUGIURA K. Parametric push-out analysis on group studs shear connector under effect of bending-induced concrete cracks[J]. Journal of Constructional Steel Research, 2013, 89(5): 86-97. KIM J S, KWARK J, JOH C, et al. Headed stud shear connector for thin-ultrahigh-performance concrete bridge deck[J]. Journal of Constructional Steel Research, 2015,108: 23-30. REN X S, ZHOU B. Design and analysis of a reinforced concrete beam retrofitted by externally bonded h-type steel member[J]. Procedia Engineering, 2011, 14: 2133-2140. LUO Y J, LI A, KANG Z. Parametric study of bonded steel-concrete composite beams by using finite element analysis[J]. Engineering Structures, 2012, 34(1): 40-51.
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