预应力锚索预应力损失特征及模型研究

英文篇名：Study on Prestress Loss Characteristic and Model of Prestressed Cable
中文刊名：长江科学院院报
英文刊名：Journal of Yangtze River Scientific Research Institute
作者：景锋 ; 余美万 ; 边智华 ; 尹健民
英文作者：JING Feng ; YU Mei-wan ; BIAN Zhihua ; YIN Jian-min(Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources ; Yangtze River Scientific Research Institute ; Wuhan 430010 ; China)
中文关键词：预应力锚索 ; 预应力损失特性 ; 预应力损失模型
英文关键词：prestressed cable ; prestress loss ; model of prestressed cable
出版日期：2007-10-15
机构：长江科学院水利部岩土力学与工程重点实验室,长江科学院水利部岩土力学与工程重点实验室,长江科学院水利部岩土力学与工程重点实验室,长江科学院水利部岩土力学与工程重点实验室武汉430070,武汉430070,武汉430070,武汉430070
年：2007
期：05
出版单位：长江科学院院报

摘要

总结了预应力锚索的预应力变化规律以及影响预应力变化的各种因素,基于岩体流变和锚索松弛的耦合作用,推导了锚索预应力变化的数学模型。该模型反映了锚索预应力变化的实质,可较精确计算锚索预应力的变化情况,并能预测锚索的最终有效预应力。该模型工程应用证明锚索预应力的计算值与实测值相当接近且变化规律基本相同。
Prestressed cables are widely used in reinforced concrete work of geotechnical engineering.In this paper,prestress change laws and factors influencing prestress change are studied systematically,and a model predicting the prestress loss is built based on the coupling of rock mass creep and relaxation of prestressed cable.This suggested model can predict prestress loss and the final prestress of prestressed cable,and is proved from an engineering illustration that calculated values obtained by author's formula rather approach to measured data and their change laws are similar.

引文

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