工字形钢筋混凝土矮墙抗剪承载力研究

工字形钢筋混凝土(RC)矮墙在双主轴向均具有较高的强度和刚度，常用于低、中层建筑及核电站设施中。现有规范在预测工字形RC矮墙抗剪承载力时存在考虑参数不足、未考虑翼缘影响等问题，计算值于试验值相比离散性也较大。该文建立了一个包含有152个试件的参数详尽的工字形RC矮墙试验数据库。并以此为基础，比对分析了多国规范的在预测此类墙抗剪承载力上的表现。同时，基于腹板裂纹分布，建立了考虑翼缘影响的工字形RC矮墙抗剪承载力计算模型，并利用力平衡推导出相应公式。结果表明:较各国规范，该文提出的公式预测精度更高，所得计算值与实测值之比的均值为1，变异系数也较小。其成果可为RC剪力墙的设计和规范公式的修订提供指导。

PEAK SHEAR STRENGTH OF H-SHAPED REINFORCED CONCRETE SQUAT WALLS

Flanged RC squat walls are widely used in conventional buildings and nuclear facilities owing to the significant lateral strength and stiffness in both principle directions. The building codes are found to have some problems in predicting the peak shear strength of flanged RC squat walls, such as insufficient parameters and the exclusion of the influence of the flanges. Moreover, calculated values are more discrete than experimental values.In this paper, we established a database of the comprehensive information of 152 flanged RC squat walls. The performance of popular building codes in predicting the peak shear strength of this kind of walls was compared and analyzed. Based on the crack patterns on the web, a model of flanged RC squat walls considering the influence of the flanges was built, based on which the equation for the peak shear strength was deduced. The results reveal that the proposed equation can calculate the peak shear strength of the shear walls in the database with a mean value of 1 and a small variation coefficient. These results can provide guidance for the design of structural walls and the revision of building codes.