预应力锚索锁定损失影响因素的灰色关联度分析

Influence factors of load at lock off of prestressed anchors based on grey relevant degree theory

通过现场实测数据,总结了预应力锚索的锁定损失影响因素。运用灰色灰色系统理论的关联度分析方法,分析了锚索的锁定荷载、自由段长度及锚固段长度对预应力锚索锁定损失的影响。结果表明:张拉荷载对预应力锁定损失的影响最大,其次是锚索自由段长度,锚固段长度对预应力锁定损失最小。本文的研究结果可为今后类似工程提供借鉴。

Based on the data obtained from the in-site experiment of prestressed anchors,the factors that contribute to instantaneous loss of load were investigated,and three parameters,namely load applied by the jack to the cables,free length,and anchored length,were regarded as the main factors.Then grey-correlation theory was applied to analyse the correlation between these parameters and instantaneous loss of load.It is shown that the influence of the load applied by the jack to the cable and the free length is larger than anchored length.This study provides reference for the design of other similar projects.