Shear Performance of Short Channel Connectors in a Steel-UHPC Composite Deck
Shear Performance of Short Channel Connectors in a Steel-UHPC Composite Deck
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DOI：
10.1007/s13296-019-00289-1
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发表时间：
2020-02
影响因子：
1.5
通讯作者：
Qiu Zhao;Yang Du;Yunfan Peng;Chen Xu;Guanming Huang
中科院分区：
文献类型：
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作者：
Qiu Zhao;Yang Du;Yunfan Peng;Chen Xu;Guanming Huang
钢-超高性能混凝土（UHPC）复合桥面板因改善钢桥面和路面的疲劳损伤而日益受到关注。复合甲板中的UHPC板材具有良好的拉伸性能和较小的厚度，有助于实现轻自重。然而，这导致剪力连接件传递层间剪力的空间有限。因此，本研究提出了一种用于UHPC薄板组合桥面板的短槽钢连接件，并通过推出试验和参数化有限元分析研究了其力学性能。试验结果表明，通道连接件在加载过程中的变形一般包括弹塑性、弹塑性和塑性阶段，且通道连接件的失效模式以剪切断裂为主。嵌筋试件的抗剪刚度提高了39%，但对抗剪承载力影响不大。另一方面，参数分析表明，随着连接器高度从 50 毫米增加到 80 毫米，连接器的剪切强度显着增加。然而，连接器排列方向是连接器抗拔力的敏感因素。
The steel-ultra high performance concrete (UHPC) composite deck has been increasingly concerned for the fatigue damage ameliorations on the steel bridge deck and the pavement. The UHPC plate in the composite deck featured by the favorable tensile performance and small thickness helps achieving a light self-weight. However, it results to a limited short space for the shear connector to transfer the interlayer shear force. Therefore, this study proposed a kind of short steel channel-section connector for the composite deck with a thin UHPC plate, and investigated its mechanical behavior through push-out tests and parametric FEM analysis. The test results showed the deformation of the channel connector during the loading process generally included the elastic, elastic–plastic, and plastic stages, and the shear fracture of channel connector dominated in the failure mode. The shear stiffness of the specimen with embedded reinforcement was increased by 39%, but had little influence on the shear capacity. On the other side, the parametric analysis told that the shear strength of connector increased significantly as the connector height increased from 50 to 80 mm. Nevertheless, the connector arrangement direction was a sensitive factor to the uplift resistance of the connector.