摘要
建立12个带填充墙的10层框架结构有限元模型,研究不同地震波作用下填充墙的材料、空间布置、各层墙数量等因素对结构抗侧刚度的影响。分析表明:填充墙分别采用标准砖、空心砖、加气混凝土砌块时,"薄弱层"刚度突变的影响逐渐减小,但不宜忽略不计;某层填充墙截面面积与其相邻上层填充墙截面面积之比γw≤45%时,应将该层视为薄弱层,实际设计过程中建议γw最小取60%;在数值分析基础上,提出了考虑填充墙影响的框架结构层间抗侧刚度计算模型。
Twelve finite element models of a ten-story frame structure were set up to investigate the influences on its horizontal stiffness of the filled wall under different seismic waves.The main influential factors included the wall’s material,its spatial arrangement,and its quantity in every story.Results indicate that from standard brick to hollow brick and aerated concrete block,the effect on changing stiffness of filled wear’s materials becomes smaller and smaller,but it’s influences cannot be ignored.When the cross-section ratio of first layer’s filled wall to next layer’s filled wall is smaller than 45%,the layer should be treaded as weak layer.The cross-section ratio can be equal or greater than 60% in design.Based on numerical analysis,the formulas for calculating horizontal stiffness are presented,on which the influences of filled wall are given.
出处
《工业建筑》
CSCD
北大核心
2010年第12期34-38,共5页
Industrial Construction
基金
高等学校博士点基金(20090205120008)
中央高校科研专项基金(CHD2009JC160)
长安大学基础研究专项基金
关键词
框架结构
填充墙
抗侧刚度
薄弱层
frame structure
filled wall
horizontal stiffness
weak layer
