【摘要】 首先通过文献收集与整理,总结了国内外对于套筒灌浆连接的基本要求。基于已有试验研究成果,提出普通套筒灌浆连接受拉的失效模式。基于黏结失效机理,再提出基于钢筋与灌浆料黏结的普通套筒灌浆连接受拉承载力计算表达式,通过17个文献试验数据的拟合分析与16个其他试验数据的验证分析,证明所提表达式的准确性。此外,还建立了套筒与灌浆料的摩擦力计算表达式,并指出摩擦力是灌浆料与套筒共同工作的关键因素。最后建议普通套筒灌浆连接受拉承载力取经过试验数据校正后的三个表达式计算结果的最小值,此外套筒与灌浆料之间的摩擦系数不低于0.59的要求还需要更多的研究进行验证。更多还原

【Abstract】 Through an intensive literature review and analysis,a summary is made on the basic requirements of grouted sleeve splice under direct tensile loads.Failure models of the non-propriety grouted sleeve splice are put forward in the light of existing experimental research.Then a new empirical equation is built for calculating the tensile capacity of non-proprietary grouted sleeve splice,which is based on the bond failure between the grout and bar.Through fitting analysis of 17 collected experimental data and verification analysis of 16 other experimental data,it is shown that the new equation is correct.A new formula is also built to calculate friction between the sleeve and grout.The frictional force is found to be a key factor to control the facial performance between the sleeve and grout.It is suggested that the tensile capacity of the splice should be determined as the minimum of values predicted via the three tensile capacity equations after being corrected by test data.The frictional coefficient between grout and sleeve should be more than 0.59 while further verification is necessary.更多还原