体外预应力结构中体外束的合理自由长度的初步研究  

Tentative Research on Rational Free Length of External Beam in Externally Prestressed Structures

作　　者：郝海洪[1] 

机构地区：[1]辽宁省交通勘测设计院,沈阳110005

出　　处：《北方交通》2006年第7期52-54,共3页Northern Communications

摘　　要：体外预应力已经取得了广泛的应用,但其计算理论仍不太完善。对体外预应力桥梁结构的精确计算需要精确的考虑体外束偏心距变化引起的二次效应的影响,事实上这在工程实践中既过于繁琐又没有意义。本篇论文介绍了结合欧洲规范总结出来的一种计算可以忽略二次效应的最大体外束自由长度的公式,对国内的体外预应力研究具有一定的借鉴作用。External prestress has achieved a widespread use already,however its theory of computation is still less - perfect. The exact computation of externally - prestressed structure of bridge needs carefully take an affection of quadratic effect, which is arisen from the variation of eccentric distance of external beam, into account, that is beth over - eleborate and insignificant. The paper introduces a formula of calculation obtained around European Specification, which could neglect the quadratic effect and computes the free length of maximum external beam, that has a definite use for referance to external prestress research at home.

关 键 词：体外预应力 二次效应 非线性 

分 类 号：U443.22[建筑科学—桥梁与隧道工程] TU378[交通运输工程—道路与铁道工程]