南华大学学报（自然科学版）
南華大學學報（自然科學版）
남화대학학보（자연과학판）
JOURNAL OF NANHUA UNIVERSITY(SCIENCE AND TECHNOLOGY)
2014年
3期
108-114
,共7页
拱坝%稳定性%非线性有限元%数值模拟%安全系数法
拱壩%穩定性%非線性有限元%數值模擬%安全繫數法
공패%은정성%비선성유한원%수치모의%안전계수법
arch dam%stability%non-linear finite element%numerical simulation%safety coef-ficient method
为分析拱坝坝体与坝肩稳定性,通过建立三维非线性有限元计算模型,计算了基本荷载组合、特殊荷载组合两种工况下拱坝的位移和应力.依据数值计算结果,绘制了位移等及应力等值线,采用有限元分析法分析了坝体应力结果,并从超载安全系数法和点强度储备安全系数法两个角度探讨了坝肩岩体的稳定性,结果表明：1)拱坝的最大位移发生在顺流方向,最大位移值为8.95 mm；2)正常蓄水水位和校核洪水水位时坝体的最大拉、压应力均满足容许应力要求；3)坝肩岩体的安全系数为3.8,满足安全要求.
為分析拱壩壩體與壩肩穩定性,通過建立三維非線性有限元計算模型,計算瞭基本荷載組閤、特殊荷載組閤兩種工況下拱壩的位移和應力.依據數值計算結果,繪製瞭位移等及應力等值線,採用有限元分析法分析瞭壩體應力結果,併從超載安全繫數法和點彊度儲備安全繫數法兩箇角度探討瞭壩肩巖體的穩定性,結果錶明：1)拱壩的最大位移髮生在順流方嚮,最大位移值為8.95 mm；2)正常蓄水水位和校覈洪水水位時壩體的最大拉、壓應力均滿足容許應力要求；3)壩肩巖體的安全繫數為3.8,滿足安全要求.
위분석공패패체여패견은정성,통과건립삼유비선성유한원계산모형,계산료기본하재조합、특수하재조합량충공황하공패적위이화응력.의거수치계산결과,회제료위이등급응력등치선,채용유한원분석법분석료패체응력결과,병종초재안전계수법화점강도저비안전계수법량개각도탐토료패견암체적은정성,결과표명：1)공패적최대위이발생재순류방향,최대위이치위8.95 mm；2)정상축수수위화교핵홍수수위시패체적최대랍、압응력균만족용허응력요구；3)패견암체적안전계수위3.8,만족안전요구.
For analyzing the stability of an arch dam and its abutment,the 3D non-linear fi-nite element model was established, and the displacement and stress were solved for the basic load combination and special load combination. Then,according to the numerical cal-culation,some stress and displacement isolines were plotted. After that,the finite element method was adopted to study its stress condition;the dam abutment stability was analyzed by safety coefficient methods of point strength and integral overload. Results show that:1) the maximum displacement of this dam is 8 . 95 mm which presents at down-flow direction;2 ) both the maximum tension stress and pressure stress meet the requirements of allowable stresses for impounded water level and flood level;3 ) the safety coefficient of abutment is 3. 8,which means the dam is safe enough.
