矩形钢管混凝土柱在扭矩作用下的截面剪应变场研究

发布时间：2018-03-04 09:14

本文选题：钢管混凝土　切入点：矩形截面　出处：《工程力学》2014年05期 　论文类型：期刊论文

【摘要】：对矩形截面钢管混凝土柱在纯扭和压扭荷载作用下的滞回性能进行了试验研究,得到了矩形截面钢管混凝土柱的扭矩-扭转角滞回曲线。基于材料力学基本原理建立了纤维梁截面扭率和纤维剪应变间的关系,进而对矩形截面钢管混凝土柱在扭矩作用下的截面剪应变场分布规律进行了分析,并建立了三维精细有限元模型进行精度验证,最后给出了钢管混凝土柱截面扭率和截面纤维剪应变间关系的矩阵表达,引入了考虑扭转效应的纤维梁模型,使该模型能够用于分析矩形截面钢管混凝土柱在扭矩作用下的非线性反应。与试验结果的对比表明,考虑扭转效应的纤维梁模型在分析矩形截面往复扭矩荷载作用下的受力行为时具有较高的求解精度和求解效率,可为分析不同类型结构体系在地震复杂受力状态下的动力反应提供依据。
[Abstract]:The hysteretic behavior of concrete-filled steel tubular columns with rectangular section under pure torsional and compressive torsional loads is studied experimentally. The torque-torsion angle hysteretic curve of concrete-filled steel tubular columns with rectangular section is obtained. Based on the basic principle of material mechanics, the relationship between the cross-section torsion ratio of fiber beam and fiber shear strain is established. Furthermore, the distribution of shear strain field of concrete filled steel tubular columns with rectangular section under torque is analyzed, and the precision of the three dimensional fine finite element model is established to verify the accuracy. Finally, the matrix expression of the relationship between cross-section torsion rate and fiber shear strain of concrete-filled steel tubular columns is given, and a fiber beam model considering torsional effect is introduced. The model can be used to analyze the nonlinear response of concrete-filled steel tubular columns with rectangular section under torque. The fiber beam model with torsional effect has high accuracy and efficiency in analyzing the behavior of rectangular cross section under reciprocating torque load. It can provide a basis for analyzing the dynamic response of different structural systems under complex earthquake loading.
【作者单位】：清华大学土木工程系;中国铁道科学研究院;土木工程安全与耐久教育部重点实验室;
【基金】：国家自然科学基金项目(51078206) “十二五”科技支撑计划项目(Grant No.2011BAJ09B01)
【分类号】：TU398.9

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