本文選題：預制混凝土結構　切入點：灌漿套筒　出處：《哈爾濱工業(yè)大學學報》2015年12期 　論文類型：期刊論文

【摘要】：為降低預制裝配混凝土結構中的鋼筋連接成本,利用無縫鋼管,采用冷滾壓工藝研制了一種新型鋼筋連接用灌漿套筒,通過接頭單向拉伸試驗,主要研究了套筒的約束機理及約束應力分布.結果表明:該新型接頭能夠滿足JGJ107—2010規(guī)定的單向拉伸強度要求;套筒在灌漿料硬化階段產(chǎn)生的初始約束應力與鋼筋、灌漿料、套筒的力學特性及接頭尺寸有關,并隨灌漿料膨脹率的增加呈線性增長;套筒變形段對灌漿料的平均約束應力大于套筒光滑段,變形段約束主要來自內(nèi)壁環(huán)肋處相互擠壓力的徑向分力,光滑段對灌漿料的約束取決于灌漿料劈裂變形的大小.
[Abstract]:In order to reduce the cost of steel bar connection in precast assembly concrete structure, a new grouting sleeve for steel bar connection was developed by using seamless steel tube and cold rolling technology. The uniaxial tensile test of the joint was carried out. The constraint mechanism and stress distribution of the sleeve are studied. The results show that the new joint can meet the requirements of uniaxial tensile strength stipulated by JGJ107-2010, and the initial restraint stress and the reinforcement and grouting material produced by the sleeve during the grouting hardening stage. The mechanical properties of the sleeve are related to the size of the joint, and it increases linearly with the increase of the expansion ratio of the grouting material, and the average restraint stress of the deformation section of the sleeve on the grouting material is greater than that of the smooth section of the sleeve. The constraint of deformation section mainly comes from the radial component force of extrusion force at the inner wall ring rib, and the constraint of smooth section on grouting material depends on the size of split deformation of grouting material.
【作者單位】： 東南大學土木工程學院;
【基金】：國家科技支撐計劃項目(2011BAJ10B03)
【分類號】：TU755.3

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本文編號：1646101