振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2014年
20期
75-80
,共6页
重力坝%损伤开裂%配筋措施%嵌入式模型
重力壩%損傷開裂%配觔措施%嵌入式模型
중력패%손상개렬%배근조시%감입식모형
gravity dam%damage crack%reinforcement%embedded model
针对地震作用下重力坝损伤开裂直接影响大坝安全问题,以Koyna水坝为研究对象,提出两种不同抗震配筋形式,利用混凝土塑性损伤开裂模型计算不同配筋方案混凝土重力坝地震响应。采用钢筋混凝土嵌入式模型考虑钢筋加强作用,据断裂能守恒原理调整混凝土软化段曲线,获得强化后混凝土本构。数值分析结果验证在坝体薄弱部位进行抗震配筋的必要性与实用性。
針對地震作用下重力壩損傷開裂直接影響大壩安全問題,以Koyna水壩為研究對象,提齣兩種不同抗震配觔形式,利用混凝土塑性損傷開裂模型計算不同配觔方案混凝土重力壩地震響應。採用鋼觔混凝土嵌入式模型攷慮鋼觔加彊作用,據斷裂能守恆原理調整混凝土軟化段麯線,穫得彊化後混凝土本構。數值分析結果驗證在壩體薄弱部位進行抗震配觔的必要性與實用性。
침대지진작용하중력패손상개렬직접영향대패안전문제,이Koyna수패위연구대상,제출량충불동항진배근형식,이용혼응토소성손상개렬모형계산불동배근방안혼응토중력패지진향응。채용강근혼응토감입식모형고필강근가강작용,거단렬능수항원리조정혼응토연화단곡선,획득강화후혼응토본구。수치분석결과험증재패체박약부위진행항진배근적필요성여실용성。
Damage and crack are the key factors affecting the dam’s safety under seismic excitation.Taking the Koyna arch dam as an example,two different forms of seismic reinforcement schemes were presented.According to the plastic-damage and crack model of concrete and also the embedded model of reinforced concrete,the seismic responses of concrete gravity dams were calculated under different reinforcement schemes. The results verify the necessity and practicality of arranging reinforcement for strengthening seismic resistance at weak parts of the dam.