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发布时间:2020-01-06 00:00:00
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房建材料及制品

灌浆缺陷对半灌浆套筒接头力学性能影响的试验研究
灌浆缺陷对半灌浆套筒接头力学性能影响的试验研究
  • 彭建和1,吴 韬2,*,侯高峰3,沈小璞2,胡元超2,赵倩青4
2023年第11期
摘要
引用本文
摘   要:为研究不同程度竖向顶部脱空灌浆缺陷对半灌浆套筒接头力学性能的影响,设计和制作了灌浆饱满度分别为60%~100%的五种钢筋试件,并对其进行了单向拉伸、高应力反复拉压和大变形反复拉压试验,分析了不同加载工况下半灌浆套筒接头的破坏模式、抗拉强度、残余变形和灌浆料破坏深度。结果表明:在单向拉伸荷载作用下,灌浆饱满度超过60%后,各试件均未发生钢筋拔出破坏,抗拉强度和残余变形基本一致;在高应力反复拉压和大变形反复拉压荷载作用下,60%灌浆饱满度的试件出现钢筋拔出破坏;随着灌浆饱满度提高,试件残余变形逐渐减小。 Abstract: To study the mechanical performance of semi-grouted sleeve connections with different vertical grouting defects at top, five kinds of semi-grouted sleeve connection specimens with grout fullness of 60%~100% were designed and produced to conduct monotonic tensile, high stress repeated tension-compression and large deformation repeated tension-compression tests. The damage mode, tensile strength, residual deformation, and grout damage depth were analyzed under different loading conditions. The results show that after the grouting fullness exceeded 60% under monotonic tensile loading, no rebar pullout damage occurrs in each specimen, and the tensile strength and residual deformation are basically the same. Under the high stress repeated tension-compression and large deformation repeated tension-compression loading, rebar pullout damage appears in the specimen of 60% grouting fullness. With the increase of the grouting fullness, the residual deformation of semi-grouted sleeve connection is gradually reduced.
彭建和,吴韬,侯高峰,等.灌浆缺陷对半灌浆套筒接头力学性能影响的试验研究[J].混凝土与水泥制品,2023(11):62-66. PENG J H,WU T,HOU G F,et al.Experimental study on the effect on the mechanical performance of semi-grouted sleeve connections with grouting defects[J].China Concrete and Cement Products,2023(11):62-66.
十字型钢钢骨混凝土复合柱的抗震性能研究
十字型钢钢骨混凝土复合柱的抗震性能研究
  • 邱昕玥,邵永健*,谢 强
2023年第11期
摘要
引用本文
摘   要:为研究配箍率、箍筋连接方式、有无栓钉对十字型钢混凝土复合柱抗震性能的影响,对5根十字型钢钢骨混凝土复合柱(SSRCZ)和1根钢筋混凝土柱(RCZ)进行了拟静力试验,分析了压弯剪扭作用下试件的破坏形态、滞回曲线、骨架曲线、特征点参数及受扭等效黏滞阻尼系数,并推导了受扭承载力计算公式。结果表明:6个试件均发生了受扭破坏,SSRCZ试件的抗震性能优于RCZ试件,试件的扭矩-扭率曲线均呈捏拢“S”形;增大配箍率对SSRCZ试件抗震性能的影响并不明显;采用焊接箍筋能有效提升试件的延性和耗能能力;配置栓钉对SSRCZ试件受扭承载力和受扭耗能能力有一定程度提升,但其延性有一定程度降低。 Abstract: To study the influence of reinforcement ratio, stirrup connection method, and the presence or absence of bolts on the seismic performance of cross-section sharped steel reinforced concrete composite columns, the pseudo static tests were conducted on 5 cross-section sharped steel reinforced concrete composite columns (SSRCZ) and 1 reinforced concrete comparison column(RCZ). The failure mode, hysteresis curve, skeleton curve, characteristic point parameters and equivalent viscous damping coefficient of the specimens under compression bending shear torsion were analyzed, and the formula for calculating the torsional bearing capacity was derived. The results show that all 6 specimens have undergone torsional failure, and the seismic performance of SSRCZ specimens is better than that of RCZ specimens. The torque torsion ratio curve of the specimens shows a pinched "S" shape. The effect of increasing the reinforcement ratio on the seismic performance of SSRCZ specimens is not significant. The use of welded stirrups can effectively improve the ductility and energy consumption capacity of the specimen. The torsional bearing capacity and torsional energy dissipation capacity of SSRCZ specimens equipped with bolts are improved to a certain extent, but their ductility are reduced to a certain extent.
邱昕玥,邵永健,谢强.十字型钢钢骨混凝土复合柱的抗震性能研究[J].混凝土与水泥制品,2023(11):67-72. QIU X Y,SHAO Y J,XIE Q.Research on seismic performance of cross-section shaped steel reinforced concrete composite columns[J].China Concrete and Cement Products,2023(11):67-72.
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