轴压荷载作用下双钢板-混凝土组合剪力墙中钢板屈曲性能研究
Buckling Behavior of Steel Plate in Composite Shear Walls with Double-Skin Steel Plate and Filled Concrete Under Compression
于跃 1石军 2蔡利建 1郭兰慧3
作者信息
- 1. 中国核电工程有限公司,北京 100840
- 2. 哈尔滨工业大学(威海)海洋工程学院,山东威海 264209;哈尔滨工业大学(威海)山东省高等学校土木工程结构与防灾实验室,山东威海 264209
- 3. 哈尔滨工业大学土木工程学院,哈尔滨 150090
- 折叠
摘要
双钢板-混凝土组合剪力墙作为建筑物中的抗侧力构件,具有承载力高、耗能能力强和延性好等优点.在高层和超高层建筑结构中,双钢板-混凝土组合剪力墙需要承担一定的竖向荷载,钢板在正常使用阶段要求不发生弹性屈曲.钢板初始几何缺陷是影响双钢板-混凝土组合剪力墙轴压荷载下钢板屈曲应力的重要指标,而在以往的研究中,钢板屈曲应力的计算方法并未予以考虑.基于前期的双钢板-混凝土组合剪力墙轴压试验研究,采用分析软件ABAQUS建立了双钢板-混凝土组合剪力墙轴压试件有限元模型,模型中引入了钢板的初始几何缺陷,从钢板屈曲应变、荷载-位移曲线和破坏模态等方面与试验结果进行对比,验证了模型分析结果的合理性.在此基础上进行参数分析,系统研究了钢板初始几何缺陷、钢板距厚比和钢材屈服强度等参数对钢板屈曲性能的影响规律,基于试验和数值模拟分析结果,提出了考虑钢板初始几何缺陷影响的双钢板-混凝土组合剪力墙钢板屈曲应力计算方法.
Abstract
Since the double-skin steel plate concrete composite wall can be used as the lateral force resisting member,there are some advantages,such as high capacity,excellent energy dissipation and favorable ductility.Double-skin steel plate concrete composite walls in high-rise buildings are subjected to vertical loading,but the elastic buckling of steel plate is not allowed.Although the initial geometrical imperfection of steel plate is a critical influencing factor for the buckling stress,it was not considered in the calculation of the buckling stress.The finite element model(FEM)of double-skin composite walls was established by using ABAQUS in consideration of initial geometric imperfection of steel plate.The buckling strain of steel plate,load-displacement curves and failure modes obtained by FEM matched well with those from the test.The parametric analysis was conducted to study the influence of initial geometric imperfection,welding spot spacing-to-thickness ratio and steel yielding stress.The equation of steel plate buckling stress accounting for initial geometric imperfections was proposed.
关键词
组合剪力墙/轴压性能/钢板屈曲/初始几何缺陷Key words
composite shear wall/axial compressive behavior/buckling of steel plate/initial geometric imperfection引用本文复制引用
基金项目
国家重点研发计划(十四五)(2022YFC3802001)
国家自然科学基金(52308162)
出版年
2024
国家科技期刊平台
NSTL
万方数据