水利水电技术2017，Vol.48Issue(3)：30-33,70,5.DOI:10.13928/j.cnki.wrahe.2017.03.006
基于有限元法的闸室抗震安全评价
Finite element method-based seismic safety assessment on sluice chamber
摘要
Abstract
Because of the limited experience for the engineering design of sluice during the initial construction period in China,the actual seismic demand from sluice was not fully considered at that time,thus the design standard is a little bit lower,for which the seismic safety is necessary to be made.By taking a sluice as the study case,a 3-D model for simulating the foundation and the upper structure of the sluice is established through the finite element software-ANSYS,as the sluice is located at a region with the seismic basic intensity of Ⅷ without any considerations on the seismic factors in its initial design,and then a seismic dynamic analysis is made.for it with the modal analysis and response-spectrum method.The result shows that under the effect of seismic load,the maximum settlement of the sluice chamber is 31.43 mm and the average settlement of the sluice bottom slab is 26.18 mm,which are in the margin of safety,while the maximum settlement deformation of the foundation soil concentrates downward at the edge of the sluice bottom slab,soil layer Ⅰ,soil layer Ⅱ,the upper part of soil layer Ⅲ and the settlement deformation of a part of soil layer Ⅱ is about 30 mm,which are possibly to be liquefied under the 8-magnitude earthquake.The compressive stress of the sluice chamber is 0.465 MPa and the maximum tensile stress is-76.76 kPa,and then both of them can meet the requirement of the relevant specification.However,the sliding stability of the sluice chamber cannot meet the relevant requirement,i.e.under the seismic condition,the sliding stability safety factor of the sluice chamber with anti-sliding slab is 0.944 and the sliding stability safety factor of the sluice chamber without anti-sliding slab is 0.708,thus both of them are lower than the requirement of the allowable sliding stability safety factor of 1.05.Therefore,it is suggested that the sluice chamber must be demolished and reconstructed.关键词
水闸/有限元方法/抗震安全评价/抗滑稳定性/安全系数Key words
sluice/Finite Element Method/seismic safety assessment/sliding stability/safety factor分类
水利科学引用本文复制引用
马利嘉,蔡荨,历丹丹..基于有限元法的闸室抗震安全评价[J].水利水电技术,2017,48(3):30-33,70,5.基金项目
水利部行业公益专项(201501033) （201501033）
