Formula derivation and analysis of seismic lateral pressure on squat silos
The lateral pressure on the silo wall is an important parameter in the seismic design of squat silos.However,no precise theoretical calculation formula exists in current codes or the ex-isting literature.This study aims to derive a new formula for calculating the seismic lateral pres-sure on squat silos under flat and conical stack conditions.Initially,using the limit equilibrium method,the silo was regarded as a special curved retaining wall,with the sliding wedge unit be-ing the primary focus of the analysis.Then,the pseudo-static method and the rotating seismic an-gle method were used to simplify the seismic forces and perform the limit equilibrium analysis.The calculation formula for seismic lateral pressure was derived for flat and conical stack condi-tions.Finally,measured data and theoretical calculation values of seismic lateral pressure under full load conditions were compared through an example analysis,which initially verified the accu-racy of the proposed formula.The results from numerical simulations and parametric analysis in-dicate that the calculation model fits effectively,and the friction of the silo wall must not be ig-nored due to its considerable influence.In addition,for large-diameter squat silos under flat stack conditions,changes in the radius have minimal influence on seismic lateral pressure,allowing the squat silo to be simplified as a linear retaining wall.These research results provide a valuable ref-erence for improving the calculation of seismic lateral pressure in silo design specifications.
万方数据
维普
