摘要
关于桩受水平荷载作用的计算,m法运用较为广泛.由于m法是弹性地基法,当桩体位移过大时,不考虑土体的塑性特性,易造成大的误差.在m法计算桩受水平荷载作用的基础上,考虑桩的位移过大而造成土体的屈服,假定土体为理想弹塑性体,在桩体位移达到一定值时,土体对桩的作用力不再随位移的增大而变大.对m法进行了改进,且编制了改进法计算程序,能方便地计算出水平荷载下沿桩身的水平位移和转角.通过单桩受水平荷载的试验数据,比较m法、改进m法计算值和实测值之间的差别.结果表明,在桩顶位移比较大时,改进m法能更好地反映桩的实际工作状态.
The m method is used widely in the analysis of laterally loaded pile.The m method may cause big error when the displacement of the pile is too larger,because it is a linear elastic foundation method.In this paper,a modified m method is proposed and used to analysis the laterally loaded pile when the deformation of the pile is big enough to make the soil yield.In the modified m method,the soil is assumed to be an ideal elastic-plastic body,and the force is constant when the displacement of the pile reaches a certain value.The program is made to calculating the horizontal displacement and angle.The new method is validated comparing with the experimental date.Results indicated that the modified method can satisfy the status of the pile when the displacement of pile head is quite big.
出处
《华北水利水电学院学报》
2011年第2期123-125,共3页
North China Institute of Water Conservancy and Hydroelectric Power
关键词
水平荷载
桩
M法
改进方法
laterally loaded
pile
m method
modified method
