木-混凝土组合梁研究综述

木-混凝土组合梁是将现有或者新建的木梁通过抗剪连接件与混凝土板组合成一个整体，形成可共同工作的结构构件。在木梁上连接混凝土板不仅显著提高了木梁的承载力和刚度，还可有效改善木梁的抗火、隔音和振动性能。文中阐述了木-混凝土组合梁的发展历史和发展现状，并对国内外的相关研究成果进行了系统性的回顾与总结。其中，详细介绍了木-混凝土组合梁及其抗剪连接件的短期破坏试验和长期加载试验结果，并且对现有的木-混凝土组合梁计算理论进行了分析与讨论。综述发现，木-混凝土组合梁及其连接件的试验研究已开展较多，针对实际应用中最为常见的钉类连接件和开槽连接件仍缺乏系统性的研究，组合梁在短期和长期荷载作用下的受力机理也需要进一步厘清。此外，需要加快木-混凝土组合梁计算理论的研究，以满足其设计需求。

Literature review of timber-concrete composite beams

Timber-concrete composite (TCC) beam represents a type of structural member that combines an existing or a new-built timber beam with a concrete slab by shear connectors. By connecting a concrete slab onto the top of the timber beam, not only the load-carrying capacity and stiffness of the timber beam are significantly enhanced, but also the fire resistance, acoustic and vibration performance of the timber beam are improved effectively. The history and the latest development of TCC beams are introduced, and a systematic review and summary of the results of related research achievements are presented in this paper. Both the results of short-term failure tests and long-term tests for TCC beams and shear connectors are introduced in detail. In addition, the existing calculation theories for TCC beams are analyzed and discussed. Through the review, it is found that there have been many experimental studies on TCC beams and shear connections. However, there is still a lack of systematic research on dowel-type and notched connectors, which are most commonly used in practical applications, and the mechanical mechanism of composite beams under both short-term and long-term loading conditions needs to be further clarified. In addition, it is necessary to accelerate the research on the calculation theories of TCC beams to meet the design requirements.