摘要
以截面平衡方程和结构平衡方程为基础 ,通过综合考虑混凝土的收缩徐变及预应力钢束松弛等时效因素对预应力混凝土结构的影响 ,提出了综合计算时效影响的时效分析数值算法 .运用这一方法 ,可以完成对预应力混凝土结构从施工到运营以至整个设计使用期内 ,任意时刻梁体任意截面的应力、挠度的长期预测 .这一理论已得到实验验证 。
Based on the equilibrium equation of the section and structure,an analytical method for predicating properties of the bridge structure is proposed in this paper.In the method,time dependent factors such as shrinkage,creep of concrete and relaxation of tendon as well as temperature are synthetically considered.It is shown that the method is more comprehensive,easier and more accurate than traditional methods.With the present method,a long-term evaluation for stresses and deformation,on any section of beams,at any time from the beginning of construction to opening,even to many years later,can be completed.The result based the theoretical analysis is testified by a practical engineering.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第7期813-818,共6页
Journal of Tongji University:Natural Science
关键词
预应力
混凝土结构
时效分析
长期性能
prestress
concrete structure
time-dependent analysis
long-term properties
