CAJ | 학술논문

设计制作了空间管桁架混凝土组合梁，通过组合梁的试验研究，得到了荷载-跨中挠度关系曲线、组合梁沿梁长方向的挠度曲线以及组合梁跨中截面应变沿梁高变化曲线，对比有限元分析结果表明：组合梁纵向应变沿梁高近似符合平截面假定；在整个受力阶段钢管桁架和混凝土翼板共同受力性能良好；组合梁在荷载作用下的抗变形能力较强；管桁架节点受力复杂，节点承载力是结构承载力的控制因素；有限元模型可以真实地反映实际结构的受弯承载力和挠度发展的情况。
설계제작료공간관항가혼응토조합량，통과조합량적시험연구，득도료하재-과중뇨도관계곡선、조합량연량장방향적뇨도곡선이급조합량과중절면응변연량고변화곡선，대비유한원분석결과표명：조합량종향응변연량고근사부합평절면가정；재정개수력계단강관항가화혼응토익판공동수력성능량호；조합량재하재작용하적항변형능력교강；관항가절점수력복잡，절점승재력시결구승재력적공제인소；유한원모형가이진실지반영실제결구적수만승재력화뇨도발전적정황。
The bending performances of spatial pipe truss concrete composite beams are design. Based on the experimental study of composite beams, we got the load-midspan deflection curve, composite beams along the beam length direction of the deflection curve and composite beams across the cross section curves of high strain along the beam. Comparison of finite element analysis showed that the composite beams of longitudinal strain along the beam high of beam approximation accord with flat section assumption. It performs well in the entire stress stage steel truss and concrete of wing plate stress. The composite beams are stronger in resistance to de-formation under the action of load. The bearing capacity of loading is complex, and the pipe truss node is the control factor of structure bearing capacity. The finite element model can truly reflect the flexural bearing ca-pacity and deflection.