带锚垫板的预埋预应力螺纹钢筋的弹性埋置长度计算

Subjects: Mechanics >> Applied Mechanics submitted time 2023-03-20 Cooperative journals: 《应用力学学报》

沈殷 郭泰广 王兵 万星

Abstract： Embedded prestressed rebars are used in back-tensioning construction of precast bridge caps.Because anchor plates are equipped at the anchoring end, the anchoring mechanism is the combined forcetransmission of bonded anchoring and pressure anchoring.But such combined anchoring method is stilllack of reasonable method.Based on the elastic half-space theory and equilibrium differential equations,through the deformation coordination relationship between the anchor plate and the prestressed rebar, theanchoring force calculation method and elastic embedded length formula of the embedded prestressed rebarwith anchor plate are proposed. The parameter analysis shows that the main parameters that affect the an-choring performance are the pull-out load , the diameter of rebar and the embedded length.After the param-eter fitting of 225 conditions ,a practical calculation formula is given to facilitate engineering design refer-ence.

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