建筑钢结构进展2026，Vol.28Issue(5)：60-70,130,12.DOI:10.13969/j.jzgjgjz.20241030001
双拼T形腹板嵌入式钢-混凝土组合梁抗弯性能研究
Research on the Flexural Behavior of Embedded Steel-Concrete Composite Beams with Built-Up Double-T-Shaped Webs
摘要
Abstract
To study the bending performance and failure modes of embedded steel-concrete composite beams with built-up double-T-shaped webs(DTWCB),four composite beams were designed and fabricated for symmetric third-point loading tests.During the fabrication of the specimens,the steel webs of the T-beams were cut into a dovetail configuration,and two T-beam are welded together through a transverse diaphragm to form a double-T-beam.The dovetailed steel webs were then embedded into the concrete flange plate to form a shear connector.The effects of the width of the concrete flange plate,the thickness of the steel beam web and flange plate,and the spacing between shear connectors on the bending capacity of composite beams were evaluated.The results show that DTWCB exhibit good bending performance,characterized by typical flexural failure.The specimens demonstrated significant mid-span vertical deflection prior to failure.Varying the width of the concrete flange plate has a minimal impact on the bending capacity of the composite beam.When the thickness of the steel plate is increased from 4mm to 6mm,the ultimate bearing capacity of the composite beam increases by 18.6%.Increasing the spacing between shear connectors reduces the bending capacity.Based on the test results and relevant specifications,formulas for calculating the bending capacity and stiffness of the composite structure were established,providing a reference for the design of such composite structures.关键词
钢-混凝土组合梁/双拼T形腹板嵌入式连接件/试验研究/抗弯承载力/抗弯刚度/计算公式Key words
steel-concrete composite beam/built-up double-T-shaped web embedded connector/experimental study/flexural capacity/flexural stiffness/calculation formula分类
建筑与水利引用本文复制引用
高艳娇,陈建兵,张现通,刘聪..双拼T形腹板嵌入式钢-混凝土组合梁抗弯性能研究[J].建筑钢结构进展,2026,28(5):60-70,130,12.基金项目
国家自然科学基金(52208187) （52208187）
