计算力学学报2011，Vol.28Issue(5)：737-742,6.
基于纤维单元的钢筋混凝土桥墩地震损伤评价
Seismic damage evaluation of RC bridge columns based on fiber elements
摘要
Abstract
For the advantage of high computational used in evaluation of displacement ductility capacity accuracy, fiber beam-column elements are widely of RC bridge columns. With the development of such as ultimate curvature and curvature ductility factor of critical section, maximum strain of confined concrete and reinforced steels, low cycle fatigue damage indices of longitudinal reinforcement etc. To study the accuracy degree of damage indices calculated with fiber elements and the main influencing fac- tors, stiffness-based and flexibility-based fiber elements are chosen to compute aforesaid damage indices compared with test data of RC bridge columns, with consideration of material non-linearity, geometrical non-linearity and bond-slip of anchoring steel. The study results show that the damage indices caculated by flexibility-based element are greater than those by stiffness-based element. Force-displacement curves and residual deformation calculated by both elements match the experiment with adequate accuracy. Section curvatures and tensile strain of longitudinal steel by stiffness element are colser to experimental data than those by flexibility element, but both elements underestimate section curvatures if loading displacement amplitude or shear span ratio is large. Both element overestimate tensile strain of longitudinal steel and underestimate compressive strain of concrete.关键词
钢筋混凝土桥墩/基于性能抗震设计/纤维单元/损伤指标/低周反复加载试验Key words
reinforced concrete bridge columns/performance oased seismic design/fiber element/damage index/cyclic loading test分类
天文与地球科学引用本文复制引用
艾庆华,王东升,向敏..基于纤维单元的钢筋混凝土桥墩地震损伤评价[J].计算力学学报,2011,28(5):737-742,6.基金项目
国家自然科学基金 （）
河北省自然科学基金青年基金（E2010001066）资助项目. （）
