防灾减灾工程学报2024，Vol.44Issue(3)：640-648,9.DOI:10.13409/j.cnki.jdpme.20221212001
基于IDA方法的柱承式筒仓结构地震易损性分析
Seismic Fragility Analysis of Column-Supported Silo Structures Based on IDA
摘要
Abstract
Fragility assessment is paramount in the pursuit of performance-based design for column-supported silo structures.In this study,a reinforced concrete column-supported silo was selected as the research object.Using the finite element software ABAQUS,both concrete damage plasticity model and Drucker-Prager ideal elasto-plastic model were utilized to simulate the silo structure and the grain particles,thus establishing a nonlinear finite element model that accounted for the interaction be-tween grain and structure.Following the incremental dynamic analysis(IDA)method,10 seismic re-cords were selected based on spectral compatibility principles.The maximum inter-story drift ratio and peak ground acceleration(PGA)were respectively taken as the engineering demand parameters for silo structure and seismic intensity parameters.Seismic fragility analysis and seismic damage risk assess-ment for three grain storage conditions,i.e.,empty,half-full,and full,were conducted.The results show that:(1)The maximum inter-story drift ratio of the column-supported silo structure occurred at the top of the column under all three grain storage conditions,with inter-story drift ratios of 0.015,0.013 and 0.011 radians corresponding to the plastic state of the support columns;(2)The mass of stored grain was a pivotal factor determining the degradation of structural stiffness in column-support-ed silo structure;(3)The column-supported silo structure under the three grain storage conditions met the seismic design objective of"no damage in minor earthquakes,reparable damage in moderate earth-quakes,no collapse in major earthquakes";(4)The probability of exceeding the collapse limit state for the silo under full storage condition over a 50-year period was 0.45％,comfortably below the 1％threshold defined in FEMA P750 for a 50-year collapse risk.These research results offer a foundation for performance-based design and seismic performance evaluation of silo structures.关键词
柱承式筒仓/增量动力分析法/易损性分析/有限元模型/粮食颗粒Key words
column-supported silo/incremental dynamic analysis/fragility assessment/finite element model/grain particles分类
建筑与水利引用本文复制引用
许启铿,李建业,刘涛,王桂玲,刘强,任国旗..基于IDA方法的柱承式筒仓结构地震易损性分析[J].防灾减灾工程学报,2024,44(3):640-648,9.基金项目
河南省科技攻关计划项目(212102310955)、河南工业大学高层次人才科研基金项目(2020BS044)资助 （212102310955）
