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首页> 外文期刊>Journal of Civil Engineering and Management >STUDY ON SHEAR CONNECTION OF BRIDGE STEEL TRUSS AND CONCRETE SLAB DECK
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STUDY ON SHEAR CONNECTION OF BRIDGE STEEL TRUSS AND CONCRETE SLAB DECK

机译：桥梁钢桁架与混凝土板桥的剪力连接研究。

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Longitudinal shear flow in the connection of a bridge steel truss upper chord and a concrete bridge slab is studied both in elastic and plastic stages of loading up to the shear connection collapse. First the distribution of the shear flow with an increasing level of loading is shown as resulted from 3D MNA (materially nonlinear analysis) using ANSYS software package and a former experimental verification. Nevertheless, the flow peaks in elastic stages above truss nodes due to local transfer of forces are crucial for design of the shear connection in bridges. Therefore a simple approximate 2D elastic frame modelling was suggested for subsequent extensive parametric studies. The study covers various loadings including the design loading of bridges and demonstrates importance of rigidity of the shear connection, rigidity of an upper steel truss chord and rigidity of a concrete deck. Temperature effects and a creep of concrete are also studied. The substantial part of the study deals also with concentration of shear connectors in the area of steel truss nodes and influence of the connector densification on distribution of the longitudinal shear along an interface of the steel truss chord and the concrete deck. Eurocode 4 approach and quest to find an optimum design of the shear connection in composite bridge trusses are discussed. Finally the resulting recommendations for a practical design are presented.
机译：在弹性和塑性加载阶段直至剪力连接塌陷之前，都研究了桥梁钢桁架上弦与混凝土桥面板的连接处的纵向剪切流。首先，显示了使用ANSYS软件包的3D MNA（材料非线性分析）和先前的实验验证所导致的，随着载荷水平的增加而产生的剪切流分布。然而，由于局部力的传递，桁架节点上方弹性阶段的流量峰值对于桥梁中剪力连接的设计至关重要。因此，建议为以后的大量参数研究提供一个简单的近似2D弹性框架建模。这项研究涵盖了各种载荷，包括桥梁的设计载荷，并证明了剪力连接的刚度，上部钢桁架弦的刚度以及混凝土甲板的刚度的重要性。还研究了温度效应和混凝土的蠕变。该研究的大部分内容还涉及剪力连接器在钢桁架节点区域的集中以及连接器密度对沿钢桁架弦和混凝土面板界面的纵向剪力分布的影响。讨论了Eurocode 4的方法以及寻找复合材料桥梁桁架中剪力连接的最佳设计的要求。最后，提出了针对实际设计的建议。

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