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X型支撑混凝土剪力墙抗震性能有限元分析
作者：焦红，部千，王松岩
（山东建筑大学 土木工程学院，山东 济南 250101）
摘要：为研究型钢X型支撑混凝土剪力墙的抗震性能，使用ABAQUS软件对已有试验进行计算分析，在滞回曲线和骨架曲线得到良好验证的基础上进行17个试件的参数分析，研究了轴压比、剪跨比、型钢尺寸、型钢强度对试件抗剪承载力的影响。结果表明：水平荷载作用下，纵筋首先达到屈服，随后X型钢的交叉区域屈服；随着型钢尺寸的增大、轴压比、型钢强度的提高和剪跨比的减小，试件的抗剪承载力均得到了不同程度的提高，轴压比大于0.2时延性系数小于3，剪跨比为2时延性最好，型钢尺寸对于延性影响在10%以内。随后进行了近60个不同轴压比和剪跨比的试件试算，得到了轴压比限值和剪跨比的匹配关系。最后基于现有规范提出了X型支撑剪力墙抗剪承载力计算方法，计算结果误差在10%以内。
关键词：X型支撑；型钢混凝土；剪力墙；轴压比限值；抗震性能；有限元分析
中图分类号：TU398+.2 文献标识码：A 文章编号：1001-702X（2022）10-0149-06
Finite element analysis of seismic behavior of X-braced concrete shear wall
JIAO Hong，BU Qian，WANG Songyan
（School of Civil Engineering，Shandong Jianzhu University，Jinan 250101，China）
Abstract：In order to study the seismic performance of steel X-braced concrete shear wall，ABAQUS software is used to calculate and analyze the existing tests. Based on the good verification of hysteretic curve and skeleton curve，the parameter analysis of 17 specimens is carried out，and the influence of axial compression ratio，shear span ratio，section steel size and steel strength on the shear bearing capacity of the specimen is studied. The results show that under horizontal load，the longitudinal reinforcement first yields，and then the cross region of X-section steel yields; With the increase of axial compression ratio，the size of section steel，the strength of section steel and the decrease of shear span ratio，the shear bearing capacity of the specimen has been improved to varying degrees. The ductility coefficient is less than 3 when the axial compression ratio is greater than 0.2. When the shear span ratio is 2，the ductility is the best，and the influence of section steel on the ductility is less than 10%. Then，nearly 60 specimens with different axial compression ratio and shear span ratio were calculated，and the matching relationship between the limit value of axial compression ratio and shear span ratio was obtained. Finally，based on the existing codes，the calculation method of shear capacity of X-braced shear wall is proposed，and the error of the calculation result is less than 10%.
Key words：X-type support，steel reinforced concrete，shear wall，limit value of axial compression ratio，seismic performance，finite element analysis