计算力学学报2012，Vol.29Issue(4)：532-537,6.
既有RC拱肋基于全过程刚度变化规律的承载能力预测
Evaluation of load bearing capacity based on law of stiffness changes in full process for existing RC arch rib
摘要
Abstract
Based on displacement method in matrix from structural mechanics, a method is proposed to calculate the stiffness of arch rib with nodal displacements. Example proves that the method is accurate with partial nodal displacements. Then based on this method, the nodal displacements derived from non- linear finite element analysis techniques and experimental measures are analyzed with different loading mode and damage mode for existing reinforced concrete arch rib. It is found that the section stiffness holds the characteristic of fluctuation with large range. The trends of nodal vertical stiffness are also studied with the law on section stiffness changes of arch rib. It shows that the law on nodal vertical stiff- ness changes is similar as the law on section stiffness changes within the whole loading process. Finally, a method is proposed to evaluate the bearing capacity of existing reinforced concrete arch rib. Example proves that this method is accurate too.关键词
桥梁工程/刚度/矩阵位移法/钢筋混凝土拱肋/损伤Key words
bridge engineering/stiffness/displacement method in matrix/reinforced concrete arch rib/damage分类
交通工程引用本文复制引用
蒋友宝,刘扬,张建仁..既有RC拱肋基于全过程刚度变化规律的承载能力预测[J].计算力学学报,2012,29(4):532-537,6.基金项目
国家自然科学基金 （）
长沙理工大学桥隧重点学科创新基金 （）
长沙理工大学公路工程省部共建教育部重点实验室开放基金（kq100106）资助项目. （）
