王会利,秦泗凤,张哲,许福友.自锚式斜拉-悬索协作体系桥非线性分析[J].,2010,(6):953-957 |
自锚式斜拉-悬索协作体系桥非线性分析 |
Nonlinear analysis of self-anchored cable-stayed suspension bridge |
|
DOI:10.7511/dllgxb201006021 |
中文关键词: 自锚式 斜拉-悬索 线性二阶 非线性 |
英文关键词: self-anchored cable-stayed suspension two-order linearity nonlinearities |
基金项目:国家自然科学基金资助项目(50708012);交通部西部交通建设科技项目(200631882350). |
|
摘要点击次数: 1680 |
全文下载次数: 1068 |
中文摘要: |
阐述自锚式斜拉-悬索协作体系桥几何非线性特征,分析混凝土收缩徐变、主缆矢跨比和主梁拱度对协作体系的影响.应用线性理论、线性二阶理论和非线性理论对一座主跨800 m的自锚式斜拉-悬索协作体系桥进行分析,得到主梁、主塔在活载作用下不同矢跨比和主梁拱度下的弯矩和位移.分析表明 主跨800 m的自锚式斜拉-悬索协作体系桥可以采用较简单的线性二阶理论进行近似活载计算,其误差不超过6%;混凝土收缩徐变对结构受力影响较大;整体刚度优于悬索桥;主缆、主梁轴力和刚度随着矢跨比的增大而减小;主梁设置拱度可以提高体系整体刚度. |
英文摘要: |
Geometrical nonlinearity of self-anchored cable-stayed suspension bridge was studied. The influences of shrinkage and creep of concrete, rise span ratio and girder camber on system were discussed. A self-anchored cable-stayed suspension bridge with main span of 800 m was analyzed with linear theory, two-order linear theory and nonlinear theory. The moment and displacement of girder, pylon under different rise span ratio and girder camber stages with live load were gotten. According to the results of analyses, the live load of a self-anchored cable-stayed suspension bridge with main span of 800 m can be analyzed with two-order linear theory and the error is less than 6%.The shrinkage and creep of concrete greatly affect the structure. And the system stiffness is superior to that of suspension bridge. As the rise span ratio becomes larger, the axial force and stiffness of main cable and girder are smaller. The system stiffness increases if main girder camber is set. |
查看全文
查看/发表评论 下载PDF阅读器 |
关闭 |
|
|
|