CAJ | 학술논문

近年来国内对型钢混凝土组合结构的研究应用已经非常广泛,但就型钢混凝土部分外包组合柱的研究仍较少。为了研究H型钢混凝土组合截面部分外包组合柱( PEC组合柱)的极限承载力、稳定性及刚度,利用有限元ANSYS软件,对3组共18根构件(12根PEC组合柱,6根H型钢柱)进行单向轴心受压模拟试验,观察了试件加载后的变形情况及截面应力云图,提取数据绘制出型钢对混凝土的约束曲线。根据模拟结果分析了试件的强度承载力、稳定性承载力及刚度等力学性能。为了验证模拟的可靠性,选取1m不同截面的两根PEC组合柱进行轴向加载试验。结果表明：PEC组合柱具有较好的变形能力；PEC组合柱的强度承载能力、稳定性及刚度比单独型钢柱均有提高；混凝土对防止型钢柱的局部屈曲起良好作用；型钢对混凝土的约束能力随型钢的高宽比的减小而增加；试验结果与模拟结果吻合较好,证实了模拟的可靠性。研究为后续的试验研究提供了合理的理论依据和参考。
근년래국내대형강혼응토조합결구적연구응용이경비상엄범,단취형강혼응토부분외포조합주적연구잉교소。위료연구H형강혼응토조합절면부분외포조합주( PEC조합주)적겁한승재력、은정성급강도,이용유한원ANSYS연건,대3조공18근구건(12근PEC조합주,6근H형강주)진행단향축심수압모의시험,관찰료시건가재후적변형정황급절면응력운도,제취수거회제출형강대혼응토적약속곡선。근거모의결과분석료시건적강도승재력、은정성승재력급강도등역학성능。위료험증모의적가고성,선취1m불동절면적량근PEC조합주진행축향가재시험。결과표명：PEC조합주구유교호적변형능력；PEC조합주적강도승재능력、은정성급강도비단독형강주균유제고；혼응토대방지형강주적국부굴곡기량호작용；형강대혼응토적약속능력수형강적고관비적감소이증가；시험결과여모의결과문합교호,증실료모의적가고성。연구위후속적시험연구제공료합리적이론의거화삼고。
Recently, composite structures of shaped steel concrete are widely applied. However, in-vestigations on partially encased concrete ( PEC) shaped steel composite columns are insufficient. In order to study the ultimate bearing capacity, stability and stiffness of PEC H-shaped steel composite columns, the axial compression analysis of 18 specimens ( 12 PEC composite columns and 6 H-shaped steel columns) was carried out using the software ANSYS. The deformation and sectional stress nephogram of the specimen after loading were observed, and the curve that reflected the re-straint of shaped steel to concrete was plotted using the extracted data. According to the results, the mechanical properties of the specimen including the bearing capacity, stability and stiffness were an-alyzed. In order to verify the reliability of simulation, two PEC composite columns of different cross sections were selected and axial loading tests were carried out on them. The results show that PEC composite column has a good deformability, and the bearing capacity, stability and stiffness of the PEC composite column are higher than those of pure steel column;that concrete is good for preven-ting local buckling of steel column, and the capacity that steel restrains concrete decreases with the increase of aspect ratio of H-shaped steel. Test results and simulation results are in good agreement, which confirms the reliability of the simulation. The research provides a theoretical basis and refer-ence for subsequent experimental study.