由纵横向贯通的钢梁与混凝土桥面板共同组成的纵横梁格桥面系是一种近些年来逐渐流行的组合结构桥梁形式。由于设置了大量的双向联结系以增加结构的整体性,桥面板的构造形式与传统结构中的也有所不同,以两座纵横梁格体系背景工程为例,研究了支承钢梁刚度的参数对桥面板受力分配的影响及变化趋势。结果表明,桥面板的受力分配情况与支承边钢梁的刚度关系密切,长宽比2.05的四边支承板在较小的刚度比下可能体现出双向板的受力分配特点,而长宽比1.53时的受力形式也可能更加接近于单向板。
Abstract
The girder and floor beam system composed of steel girder and concrete decks is a form of composite bridge that has become more and more popular in recent years. The structural form of the bridge deck is also different from that in the traditional structure due to the arrangement of a large number of two-way connections to increase the integrity of the structure. In this paper, taking two girder and floor beam systems as an example, the influence and changing trend of the parameters of the stiffness of the supporting steel girders on the force distribution of the bridge deck are studied. The results show that the force distribution of the bridge deck is closely related to the stiffness of the supporting side steel girders. The four-sided supporting deck with an aspect ratio of 2.05 may reflect the force distribution characteristics of the two-way slab at a small stiffness ratio, while the force distribution when the aspect ratio is 1.53 may be closer to the one-way deck.
关键词
组合结构桥梁 /
纵横梁格体系 /
桥面板 /
受力性能
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Key words
composite structural bridge /
girder and floor beam system /
bridge deck /
mechanical performance
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