文档介绍：河北工业大学硕士学位论文
钢桁架-混凝土板组合梁桥桥面板预应力分析
摘要
钢-混组合简支梁桥能充分发挥钢材抗拉性能好和混凝土抗压强度高的优点,然而组合
悬臂梁桥、组合连续梁桥负弯矩区混凝土受拉,为了防止桥面板开裂破坏,增加结构整体
的刚度,可以选择在混凝土桥面板上施加预应力。
施加预应力的方式有多种、对预应力效果的影响因素也较多,而规范中并没有详尽的
阐述。本文将主要的施加预应力方式和影响因素逐一分析,并在研究目前计算理论及建模
方法的基础上,针对钢桁架-混凝土板组合梁桥提出了新的分析方法。最后以天津吉兆桥为
例进行分析计算,证实了诸多因素对混凝土桥面板预应力的影响,并对设计施工提出建议。
对以后的设计和施工具有广泛的参考价值。
关键词:组合梁桥,预应力,钢桁架,混凝土板
i
钢桁架-混凝土板组合梁桥桥面板预应力分析
PRESTRESSING ANALYSIS ON THE DECK OF
STEEL-CONCRETE COPMOSITE TRUSS GIRDER BRIDGE
ABSTRACT
Steel-posite bridge can get the best use of these two materials. However, the
concrete slab under negative moment of a cantilever beam bridge or a continuous beam bridge
may suffer tensile strength. Prestress is provided to enhance the stiffness of the structure and
prevent the crack of slab.
There are several ways to provide prestress , and there are many factors affecting the
prestress which are not presented in code. This paper made detailed analysis of them and
presented new methods to analyze steel-posite truss girder bridge after researching
current theories and models. At last, this paper analyzed and calculated Jizhao Bridge to obtain
all these factors’ affect to prestress of the concrete slab and raise suggestions to design and
construction. This research has high reference value for future design and construction.
posite bridge, prestress, steel truss, concrete deck
ii
河北工业大学硕士学位论文
目录
第一章绪论·············································································································································· 1
§1 -1 研究背景·····················································································&