长江科学院院报Issue(8)：65-71,7.DOI:10.3969/j.issn.1001-5485.2015.08.012
锚索预应力长期损失与岩土体蠕变耦合模型研究
Coupled Model for the Long-term Pre-stress Loss of Anchor Cable and Geotechnical Creep
摘要
Abstract
Anchor cable is closely contacted with geotechnical body through reaction support.After a certain pre-stress is applied on anchor cable,the geotechnical body also deforms under the action of pre-stress.Due to the creep property of geotechnical body,its deformation doesn’t complete instantaneously but changes with time,which causes the long-term loss of pre-stress.In this research,anchor cable is equivalent to two models (elasticity body and generalized Kelvin body),and geotechnical body is assumed to be model of H +nK (n≤3)which could simu-late the creep property of geotechnical body.According to the coupling deformation between anchor cable and geotechnical body and the initial conditions,formulas of calculating the pre-stress of anchor cable with the change of time are obtained.Through comparison with the results of previous studies,the correctness of this model is veri-fied.Moreover,the fitting curve could be more consistent with the measured pre-stress variation if the number of K in creep model of geotechnical body is increased and the relaxation of anchor cable stress is considered in the theo-retical model.关键词
锚索/蠕变/耦合模型/应力松弛/预应力损失Key words
anchor cable/creep/coupling model/stress relaxation/loss of pre-stress分类
建筑与水利引用本文复制引用
邓东平,李亮..锚索预应力长期损失与岩土体蠕变耦合模型研究[J].长江科学院院报,2015,(8):65-71,7.基金项目
教育部博士研究生学术新人奖项目（114801045）；湖南省研究生科研创新项目（CX2012B056）；贵州省交通运输厅科技项目 （）
