Abstract The use of precast decks in steel-concrete composite construction offers variety of advantages. Research to date has mostly focused on the use of headed stud connectors with hollow core precast decks for building structures. A large number of connectors has to be used when headed studs are employed, which increases the labor required to fill the spaces with concrete, grout or mortar. In this paper, a new system is proposed where the headed studs are replaced with channel connectors to reduce the number of connectors. The proposed system was studied through a two-phase experimental program. In the first phase, 20 direct shear tests were conducted on channel connectors embedded in grout or mortar with different strengths. The size of the channel section and its length were considered as the prime variables. The test results showed that the channel connectors embedded in grout or mortar behave similar to conventional systems where the channel connectors interact with in-situ concrete. In the second phase, four full scale composite beam tests were conducted for proof-of-concept where the degree of composite action was the prime variable. The test results showed that the proposed system offers strengths similar to conventional fully or partially composite beams and can be an alternative to the existing composite systems.

中文翻译：

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预制板钢-混凝土组合梁槽道连接件的性能

摘要 在钢-混凝土复合结构中使用预制桥面板具有多种优势。迄今为止的研究主要集中在使用带有空心预制板的带头螺栓连接器用于建筑结构。使用带头螺柱时必须使用大量连接器，这增加了用混凝土、灌浆或砂浆填充空间所需的劳动力。在本文中，提出了一种新系统，将带头螺栓替换为通道连接器，以减少连接器的数量。通过两阶段实验程序研究了所提出的系统。在第一阶段，对嵌入不同强度的灌浆或砂浆的通道连接件进行了 20 次直剪试验。通道截面的大小及其长度被认为是主要变量。测试结果表明，嵌入灌浆或砂浆中的通道连接器的行为类似于通道连接器与现浇混凝土相互作用的传统系统。在第二阶段，进行了四次全尺寸复合梁测试以进行概念验证，其中复合作用的程度是主要变量。测试结果表明，所提出的系统提供类似于传统的完全或部分复合梁的强度，并且可以替代现有的复合系统。