钢筋半套筒灌浆连接的高温静力拉伸性能
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摘要
对12个钢筋半套筒灌浆连接试件在高温下进行了静力拉伸试验,并将12根同批次钢筋在同条件下进行试验作为参照.研究了温度对钢筋半套筒灌浆连接的影响,以及钢筋半套筒灌浆连接与钢筋在高温下力学性能的差异.结果表明:半套筒灌浆连接试件在高温下的极限抗拉强度与钢筋相近,试件破坏形式为钢筋被拉断、钢筋刮犁式拔出两种;钢筋半套筒灌浆连接在200℃及以下温度条件下与钢筋单向拉伸的本构关系相似,在400℃及以上温度条件下其力学性能与钢筋存在一定差异;在常温及400℃高温下,试件的破坏模式均为钢筋被拉断,在600℃高温下半套筒灌浆连接灌浆段钢筋可能先被拨出,而非拉断.
The static tensile test was carried out for 12 half grout sleeve splicing of rebars specimens under high temperature,and 12 steel bars in the same batch were tested as control group under the same conditions. The influence of the temperature on the specimens and the mechanical property difference between the specimens and the steel bars under high temperature were studied. The test results show that the ultimate tensile strength of the specimens is similar to that of the steel bar under high temperature,and the failure modes of the specimens are the tensile rupture of rebars and the pulling-out of rebars. The tensile behaviors of the specimens are similar to the constitutive relations of uniaxial tension of the steel bars at temperatures of 200 ℃ and below,while the mechanical pro-perties of the specimens is different from those of the steel rebars at temperatures of 400 ℃ and above. The failure modes of the specimens at room temperature and 400 ℃ are both tensile rupture of rebars. At 600 ℃,the rebars of the specimens may be pulled out first,rather than be ruptured.
The static tensile test was carried out for 12 half grout sleeve splicing of rebars specimens under high temperature,and 12 steel bars in the same batch were tested as control group under the same conditions. The influence of the temperature on the specimens and the mechanical property difference between the specimens and the steel bars under high temperature were studied. The test results show that the ultimate tensile strength of the specimens is similar to that of the steel bar under high temperature,and the failure modes of the specimens are the tensile rupture of rebars and the pulling-out of rebars. The tensile behaviors of the specimens are similar to the constitutive relations of uniaxial tension of the steel bars at temperatures of 200 ℃ and below,while the mechanical pro-perties of the specimens is different from those of the steel rebars at temperatures of 400 ℃ and above. The failure modes of the specimens at room temperature and 400 ℃ are both tensile rupture of rebars. At 600 ℃,the rebars of the specimens may be pulled out first,rather than be ruptured.
引文
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[13] 郑清林,王霓,陶里.灌浆缺陷对钢筋套筒灌浆连接试件性能影响的试验研究 [J].建筑科学,2017,33(5):61- 68.ZHENG Qing-lin,WANG Ni,TAO Li.Experimental study on the influence of grouting defects on the perfor-mance of steel sleeve grouting connection specimens [J].Architecture Science,2017,33 (5):61- 68.
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[15] 徐有邻,沈文都,汪洪.钢筋砼粘结锚固性能的试验研究 [J].建筑结构学报,1994,15(3):26- 37.XU You-lin,SHENn Wen-du,WANG Hong.An experimental study of bond-anchorage properties of bars in concrete [J].Journal of Building Structures,1994,15(5):26- 36.
[2] KIM Y.A study of pipe splice sleeves for use in precast beam-column connections [D].Texas:University of Texas at Austin,2000.
[3] GOH H M.Parametric study of steel grouted splice sleeve with integrated double springs under axial tension [D].Kuala Lumpur:University Technology Malaysia,2009.
[4] KIM H K.Bond strength of mortar-filled steel pipe splices reflecting confining effect [J].Journal of Asian Architecture & Building Engineering,2012,11(1):125- 132.
[5] SAYADI A A,RAHMAN A B A,JUMAAT M Z B,et al.The relationship between interlocking mechanism and bond strength in elastic and inelastic segment of splice sleeve [J].Construction & Building Materials,2014,55(55):227- 237.
[6] SAYADI A A,RAHMAN A B A,SAYADI A,et al.Effective of elastic and inelastic zone on behavior of glass fiber reinforced polymer splice sleeve [J].Construction & Building Materials,2015,80:38- 47.
[7] AMELI M J,BROWN D N,PARKS J E,et al.Seismic column-to-footing connections using grouted splice sleeves [J].ACI Structural Journal,2015,113(5):1021- 1030.
[8] HUANG Y,ZHU Z,NAITO C J.Tensile behavior of half grouted sleeve connections:experimental study and analytical modeling [J].Construction & Building Materials,2017,152(1):96- 104.
[9] 钱稼茹,彭媛媛,张景明,等.竖向钢筋套筒浆锚连接的预制剪力墙抗震性能试验 [J].建筑结构,2011,41(2):1- 6.QIAN Jia-ru,PENG Yuan-yuan,ZHANG Jing-ming,et al.Tests on seismic behavior of pre-cast shear walls with vertical reinforcements spliced by grout sleeves [J].Building Structure,2011,41(2):1- 6.
[10] 吴小宝,林峰,王涛.龄期和钢筋种类对钢筋套筒灌浆连接受力性能影响的试验研究 [J].建筑结构,2013 ,43(14):77- 82.WU Xiao-bao,LIN Feng,WANG Tao.Experimental research on effects of grout age and types of steel bars on mechanical behavior of grout sleeve splicing for reinforcing bars [J].Building Structure,2013,43( 14) :77- 82.
[11] 黄远,朱正庚,黄登,等.钢筋半套筒灌浆连接的静力拉伸试验研究 [J].华南理工大学学报(自然科学版),2016,44(2):26- 32.HUANG Yuan,ZHU Zheng-geng,HUANG Deng,et al.Investigation into half grout sleeve splicing for rebars via static tensile test [J].Journal of South China University of Technology(Natural Science Edition),2016,44(2):26- 32.
[12] 郑永峰.GDPS灌浆套筒钢筋连接技术研究 [D].南京:东南大学,2016.
[13] 郑清林,王霓,陶里.灌浆缺陷对钢筋套筒灌浆连接试件性能影响的试验研究 [J].建筑科学,2017,33(5):61- 68.ZHENG Qing-lin,WANG Ni,TAO Li.Experimental study on the influence of grouting defects on the perfor-mance of steel sleeve grouting connection specimens [J].Architecture Science,2017,33 (5):61- 68.
[14] 吴波,梁悦欢.高温下混凝土和钢筋强度的统计分析 [J].自然灾害学报,2010,19(1):136- 142.WU Bo,LIANG Yue-huang.Statistic analysis of strengths of concrete and steel bars at elevated temperature [J].Journal of Natural Disasters,2010,19(1):136- 142.
[15] 徐有邻,沈文都,汪洪.钢筋砼粘结锚固性能的试验研究 [J].建筑结构学报,1994,15(3):26- 37.XU You-lin,SHENn Wen-du,WANG Hong.An experimental study of bond-anchorage properties of bars in concrete [J].Journal of Building Structures,1994,15(5):26- 36.