L形钢管混凝土柱-钢梁框架受力性能有限元分析

发布时间：2018-01-20 15:28

本文关键词： L形钢管混凝土柱-钢梁框架有限元分析受力性能　出处：《建筑结构学报》2015年S1期 　论文类型：期刊论文

【摘要】：基于已有试验研究,采用有限元软件Open Sees,模拟了低周反复荷载作用下L形钢管混凝土柱-钢梁框架的荷载-位移曲线,并对其受力特性的影响参数进行了分析。结果表明:柱截面宽厚比D/t主要影响结构的刚度,D/t在30~70范围内时,D/t越大,加载初期结构刚度越大,后期刚度退化也越快,而柱截面长宽比D/B对结构的影响与之相反;核心混凝土抗压强度和钢材屈服强度越低,峰值荷载后,曲线下降段越平缓,结构表现出更好的延性;轴压比n对结构荷载-位移曲线有较大影响,轴压比越大,曲线上升和下降段越陡,而梁柱线刚度比对荷载-位移曲线上升段影响明显;水平荷载作用方向对荷载-位移曲线形状影响不明显。
[Abstract]:Based on the existing experimental research, the load-displacement curve of L-shaped concrete-filled steel tubular column-steel beam frame under low cyclic cyclic loading is simulated by using finite element software Open Sees. The results show that the stiffness of the structure is mainly affected by the ratio of width to thickness of column section D / t and the stiffness of the structure is larger than that of D / t in the range of 30 / 70. The greater the stiffness of the structure at the initial loading stage, the faster the degradation of the later stiffness, while the effect of the ratio of length to width of column section D / B on the structure is opposite. The lower the compressive strength of the core concrete and the lower the yield strength of steel, the more gentle the curve is after the peak load, and the better the ductility of the structure is. The axial compression ratio n has great influence on the load-displacement curve of the structure. The bigger the axial compression ratio is, the steeper the rising and descending section of the curve is, while the effect of Liang Zhu's linear stiffness ratio on the rising section of the load-displacement curve is obvious. The effect of the direction of horizontal load on the shape of load-displacement curve is not obvious.
【作者单位】：长江大学城市建设学院;长江大学结构工程与防灾研究所;
【基金】：湖北省教育厅科学技术研究项目(D20151304) 湖北省大学生创新训练计划项目(104892014001)
【分类号】：TU398.9
【正文快照】： 0引言异形钢管混凝土柱因承载力高、延性好,同时还能避免柱外凸,在多、高层建筑结构中有较好的应用前景。目前,国内外学者对矩形、方形和圆形钢管混凝土结构进行了系统研究,而对异形钢管混凝土的研究主要集中在构件层面上。王丹[1]以轴压比、钢管壁厚和内填混凝土强度为参数,

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