CAJ | 학술논문

广州西塔节点层系采用大直径体外预应力拉索直接对钢管柱施加楼层平面内方向的体外预应力.选取3根φ7×199的预应力锚具组装件进行了50次周期荷载试验及静载锚同性能足尺试验.采用两台YC-1350型液压千斤顶同步顶推箱梁对预应力试验索进行张拉,测定拉索的周期载荷性能、静载锚同性能、拉伸弹性模量以及极限拉力时的总应变和锚杯与锚板间相对位移,考核锚具拉伸时锚固情况、拉伸过程及卸载后锚具的变形情况.结果表明,经过50次循环加载后试验索均无断丝,破断荷载超过12151kN,其他各项指标也均符合要求,因而能保证广州西塔体外预应力设计的安全性.
엄주서탑절점층계채용대직경체외예응력랍색직접대강관주시가루층평면내방향적체외예응력.선취3근φ7×199적예응력묘구조장건진행료50차주기하재시험급정재묘동성능족척시험.채용량태YC-1350형액압천근정동보정추상량대예응력시험색진행장랍,측정랍색적주기재하성능、정재묘동성능、랍신탄성모량이급겁한랍력시적총응변화묘배여묘판간상대위이,고핵묘구랍신시묘고정황、랍신과정급사재후묘구적변형정황.결과표명,경과50차순배가재후시험색균무단사,파단하재초과12151kN,기타각항지표야균부합요구,인이능보증엄주서탑체외예응력설계적안전성.
The large-diameter external prestressing cable was tensioned around the steel pipe column along the internal plane derection of the node layer in the Guangzhou Westtower, and the full-scale experiment researches on 50 times cyclic load and static anchoring capability of three φ7×199 large tonnage prestressing thendon-anchorage assembly were carried out. Two YC - 1350 hydraulic jack were adopted to jack box girder synchronously to tension the prestressing cable, and the parameters were obtained such as cyclic load capability, static anchoring capability, tensile elastic modulus, total strain and relative displacement between anchor plate and anchor ring under ultimate tension. The anchorage situation when the anchor was tensiled and the deformation conditions during the tension and after the unloading were checked. It is shown that prestressing cable did not break under 50 times cyclic load, the breaking load exceeds 12151kN, and the other indexes all meet the requirement, thus the external prestressing cable design safty of the Guangzhou Westtower can be ensured.