某框架核心筒结构平板式筏形基础设计

Design of Flat Raft Foundation for A Frame Core Tube Structure

对某框架-核心筒结构平板式筏形基础进行设计分析,结果表明:地基土基床系数(与土压缩模量正相关)、基础刚度以及上部结构刚度影响着基底反力的分布状态。地基土基床系数越大,传力构件下土体集度增加,荷载向外侧扩散能力降低,则基底反力分布越不均匀;基础刚度越大,基础的跨越能力增强,荷载向外侧扩散能力提高,则基底反力分布越均匀。

The flat raft foundation of a frame-core wall structure is designed and analyzed,and the results show that base bed coefficient(positively correlated with the soil compressive modulus),foundation stiffness and structural stiffness affect distribution of foundation base reaction.When base bed coefficient is larger,soil density of force-transmission member gets greater,spreading capacity of load to outside gets lower,distribution of foundation base reaction becomes more uneven.When foundation stiffness is greater,spanning capacity of foundation gets greater,spreading capacity of load to outside increases higher,distribution of foundation base reaction becomes more uniform.