期刊论文

中文

公路交通科技

1002-0268

2011

28

2

93-96,110

10.3969/j.issn.1002-0268.2011.02.016

湖南省教育厅科研项目（08C109） 长沙理工大学土木与建筑学院重点学科基金资助项目（10QSSK07）

本校为第一机构

定量分析了钢管与核心混凝土之间的脱粘对桁架式钢管混凝土拱桥整体刚度的影响程度. 基于完全脱粘计算模型,以一桁架式钢管混凝土悬臂梁为例,揭示了脱粘使桁架式钢管混凝土拱肋抗弯刚度降低的机理. 采用有限元方法,以一桁架式钢管混凝土拱肋为例,分析了在完全脱粘情况下矢跨比、桁高、1钢管壁厚和荷载作用方式对桁架式钢管混凝土拱肋刚度的影响规律. 分析结果表明:在全跨均布荷载作用下,脱粘使得钢管混凝土桁式拱肋刚度降低最大约10%左右,在集中力或半跨均布荷载作用下,脱粘使得钢管混凝土桁式拱肋刚度降低最大会达到50%以上

The effect of debonding between steel tube and centre concrete on the stiffness of trussed CFST arch bridge were analyzed quantitatively.Based on the calculation model of complete debonding,taken a trussed CFST cantilever beam for example,the mechanism of decreasing of bending stiffness of trussed CFST arch rib due to debonding was revealed.By using finite element method,taken a trussed CFST arch rib for example,the effect rule of rise-span ratio,height of truss,thickness of steel pipe wall,and action mode of load on the stiffness of trussed CF...