型钢混凝土柱基于变形的性能指标限值研究

发布时间：2019-07-04 10:08

【摘要】：通过对型钢混凝土(SRC)柱的性能等级划分,明确了各性能等级所对应的物理损伤状态及修复方法,以钢筋、型钢和混凝土的材料应变及构件承载力作为控制条件,综合判断SRC柱的各性能等级的界限状态。采用ABAQUS有限元软件,对按我国现行规范设计的360个弯曲破坏的SRC柱进行有限元分析,得到SRC柱各性能等级的转角限值,并且分析了轴压比、含钢率、体积配箍率、剪跨比和型钢截面形式对各性能等级转角限值的影响。研究结果表明:型钢混凝土柱内置型钢截面型式对各性能界限状态变形指标限值影响不大,轴压比对各性能等级限值影响很大,含钢率、剪跨比和体积配箍率对部分性能等级的限值有明显影响。对数值计算结果进行统计分析,得到了SRC柱各性能等级的位移角限值和塑性转角限值的统计特征值及回归表达式。研究成果可为钢-混凝土混合结构基于性能的抗震设计和抗震性能评估提供参考。
[Abstract]:By dividing the performance grade of the section steel concrete (SRC) column, the physical damage state and the repair method corresponding to each performance grade are defined, and the material strain and the component bearing capacity of the steel bar, the section steel and the concrete are taken as the control conditions, And comprehensively judging the limit state of each performance level of the SRC column. Using the ABAQUS finite element software, the finite element analysis of the 360 bending-damaged SRC columns designed according to the current specifications in China is carried out to obtain the corner limits of each performance level of the SRC column, and the axial compression ratio, the steel-containing ratio and the volume ratio are analyzed. The influence of the cross-section ratio of the shear and the cross-section of the section steel on the value of the rotation angle of each performance level. The results show that the section type of the built-in section steel of the section steel concrete column has little influence on the limit value of the deformation index of each performance limit state, and the axial compression ratio has a great influence on the limit value of each performance grade, and the steel-containing ratio, the shear span ratio and the volume ratio are obviously affected by the limit value of the partial performance level. A statistical analysis of the numerical results is carried out to obtain the statistical characteristic value and the regression expression of the displacement angle limit value and the plastic corner limit value of each performance grade of the SRC column. The research results can provide a reference for the performance-based seismic design and the seismic performance evaluation of the steel-concrete mixed structure.
【作者单位】：同济大学土木工程防灾国家重点实验室;
【基金】：科技部国家重点实验室基金项目(SLDRCE14-B-21) 海南省重点研发计划项目(ZDYF2016151)
【分类号】：TU398.9

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