摘要
针对目前尚无关于集中于桩顶区域布置底部纵筋承台冲切承载力计算方法的现状,基于承台冲切破坏空间桁架理论,运用逐次多元最小二乘法,求解该类配筋形式承台的冲切承载力提高系数,进而得出其承载力计算式。通过对不同桩数、不同布桩形式的承台试验数据的验证,证实了算式的合理性。藉此,有望依靠纵筋的合理布置,降低承台和桩筏筏板的工程造价。
At present, there is no formula which calculates the quantitative influence of the bottom reinforcement arrangement concentrated at the extent near the pile top on the punching bearing capacity of pile caps.Based on the spatial strut-and-tie theory of pile cap punching failure, a gradual least square method for multiple variables was used, and calculative formulae were derived for that sort of reinforcement of the pile cap.Verification with the published test data of changeable number and arrangement of pile in the literatures both at home and abroad, indicated that the proposed formulae were rational.It was expected that the engineering cost of pile caps and the slab of pile raft could be reduced by the rational arrangement of longitudinal reinforcement.
出处
《工业建筑》
CSCD
北大核心
2015年第2期76-79,153,共5页
Industrial Construction
关键词
承台
冲切
承载力
计算
集中布筋
空间桁架
pile caps
punching
bearing capacity
calculation
concentrated reinforcement arrangement
spatial strut-and-tie
