摘要
将轴向力和弯矩共同作用下的板柱节点冲切转化为一个偏心作用力效应,基于塑性极限分析的方法,提出平动-旋转复合运动机构模型分析节点的偏心冲切,推演求出了偏载作用下的承载力的泛函表达式;通过构造的破坏曲面近似求出了节点在偏载作用下的抗冲切承载力的最小值,对计算结果进行了简化拟合,并与规范和其他的计算方法进行了比较;试验数据分析表明:平动-旋转复合运动机构模型相比与偏心剪应力模型能更好的反应柱子尺寸与板厚的比值对承载力的影响,并基于试验数据对公式进行了部分调整,计算结果与试验结果吻合良好.
The plate under the action of axial force and moment punching problem is transformed into a node eccentric force effect,Based on the plastic limit analysis method,the translational-rotational compound motion mechanism model is proposed to analyze the ultimate bearing capacity of slab-column connections,and the functional is deduced.The proximate bearing capacity under partial load was calcu lated with the assumed yield surface.Furthermore,the results were appropriately simplified,and the calculation method proposed in this paper and other calculation methods introduced in our existing specification are compared and evaluated.The comparison of the calculation methods shows that the composite motion mechanism model can reflect the influence of the ratio of column to plate thickness on the bearing capacity more accurately than the eccentric shear stress model.The adjusted method proposed in this paper is accurate to fit the test results well.
作者
易伟建
刘彪
YI Weijian;LIUBiao(School of Civil Engineering, Hunan University,Changsha 410082,China)
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2018年第2期162-168,189,共8页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金(51338004
51178175)
关键词
偏心冲切
极限分析
板柱节点
MOHR-COULOMB准则
eccentrically capacity of punching shear
ultimate strength analysis
slab-column connections
Mohr-Cou- lomb Criterion
