部分包覆T形钢–混凝土组合梁抗震性能研究综述

Research Review on the Seismic Performance of Partially Encased T-Shaped Steel-Concrete Composite Beams

摘要: 部分包覆T形钢–混凝土组合梁(Partially Encased T-shaped Steel-Concrete Composite Beam)作为一种新型组合构件，融合了钢材与混凝土的材料优势，具有承载力高、延性好、施工便捷等特点，在装配式建筑与抗震设防区结构中具有广阔应用前景。本文系统综述了该类组合梁抗震性能的研究现状，重点梳理了其在低周往复荷载作用下的滞回特性、刚度退化规律、耗能机制及典型破坏模式，分析了混凝土包覆形式、T形截面构造、连接件布置方式等关键参数对抗震性能的影响规律。进一步总结了试验研究与数值模拟的主要成果，指出当前研究中存在的理论模型不完善、设计方法不统一等不足。最后，从新型构造形式开发、高性能材料应用、梁柱节点抗震性能提升及全寿命抗震韧性评估等方面提出未来研究重点，为部分包覆T形钢–混凝土组合梁的抗震设计与工程推广提供理论支撑。

Abstract: As a new type of composite component, partially encased t-shaped steel-concrete composite beam combines the material advantages of steel and concrete, with the characteristics of high bearing capacity, good ductility and convenient construction, it has broad application prospects in prefabricated buildings and seismic fortification zone structures. This article systematically reviews the current research status of the seismic performance of this type of composite beam, with a focus on sorting out its hysteresis characteristics, stiffness degradation law, energy dissipation mechanism and typical failure modes under low-cycle reciprocating loads. It also analyzes the influence laws of key parameters such as concrete coating form, T-section structure and connection piece arrangement on seismic performance. It further summarizes the main results of experimental research and numerical simulation, and points out the shortcomings of imperfect theoretical models and inconsistent design methods in the current research. Finally, the future research focus is put forward in terms of the development of new structural forms, the application of high-performance materials, the improvement of the seismic performance of beam and column nodes and the evaluation of the full-life seismic toughness, which provides theoretical support for the seismic design and engineering promotion of some coated T-shaped steel-concrete composite beams.