超静定结构徐变效应的力法分析方法.pdfVIP

3 1 Vol3 No1 2006 2 JOURNAL OF RAILWAY SCI NC AND NGIN RING Feb2006 , ( 湖南大学 土木工程学院, 湖南长沙410082) :根据静定结构分别承受常荷载和变荷载时考虑徐变的受 和变形规律, 基于 法和龄期调整的有效模量法, 给出 了超静定结构考虑施工过程和徐变影响的内 分析方法该法去掉超静定结构中的多余约束, 使原结构等效为一个同时 承受外荷载弹性多余 和随时间变化的徐变多余 的静定结构称为基本结构对基本结构分别进行承受每种 作用时 的徐变分析,得到相应的在多余 方向上的位移根据多余 处的变形协调条件列出并求解 法平衡方程得到徐变多余 此外, 对其中一个算例进行徐变分析, 得出各相关因素对结构受 的影响 :有效模量法; 徐变;超静定结构 :TU3753 :A : 1672- 7029(2006)01- 0001- 05 Creep analysis of statically indeterminate structure by force method SHEN Pusheng, FAN Hui ( Collegeof Civil Engineering, Hunan University, Changsha 410082, China) Abstract: According to the creep behavior of statically, structure under constant load and changing load were deter mined, respectively, the internal analysis method of statically indeterminate structure considering the effects of con struction and creepwas presentedThis method isbasedon the ideas of forcemethod and age- adjusted effectivemod ulemethodBy removing redundant restraints, the initial structure is equivalent to a statically determinate structure, named released structure, which subjects to loads, redundant forces obtained in elastic analysis and creep- redundant force changingwith time dueto the creep of structureDisplacements on the directions of redundant forces can be ob tained by creep analysis of released structure under every forcementioned aboveAccording to conformability of defor mation, creep- redundant forces can be attained by resolving equilibrium equationsEffects of relevant factors on the statically indeterminate structurewere presented through a numerical example Key words: effectivemodule method; creep; statically indeterminate structure 1 2 ~ 3 ,