水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2012年
1期
73-77
,共5页
直埋式蜗壳%温度荷载%混凝土裂缝%应力强度因子%断裂韧度
直埋式蝸殼%溫度荷載%混凝土裂縫%應力彊度因子%斷裂韌度
직매식와각%온도하재%혼응토렬봉%응력강도인자%단렬인도
complete bearing spiral case%temperature load%concrete crack%stress intensity factor%fracture toughness
大型直埋式蜗壳结构在温度作用下,外围混凝土裂缝受力条件复杂。以某水电站蜗壳结构为计算实例,应用ANSYS有限元软件建立了带裂缝的蜗壳管节模型,引入混凝土断裂力学。考虑温度变化作用,计算蜗壳结构在温度荷载作用下外围混凝土裂缝的应力强度因子,根据混凝土复合裂缝判据判断蜗壳外围混凝土裂缝的稳定性。计算结果表明,温度荷载对蜗壳外围混凝土裂缝稳定性影响较大。
大型直埋式蝸殼結構在溫度作用下,外圍混凝土裂縫受力條件複雜。以某水電站蝸殼結構為計算實例,應用ANSYS有限元軟件建立瞭帶裂縫的蝸殼管節模型,引入混凝土斷裂力學。攷慮溫度變化作用,計算蝸殼結構在溫度荷載作用下外圍混凝土裂縫的應力彊度因子,根據混凝土複閤裂縫判據判斷蝸殼外圍混凝土裂縫的穩定性。計算結果錶明,溫度荷載對蝸殼外圍混凝土裂縫穩定性影響較大。
대형직매식와각결구재온도작용하,외위혼응토렬봉수력조건복잡。이모수전참와각결구위계산실례,응용ANSYS유한원연건건립료대렬봉적와각관절모형,인입혼응토단렬역학。고필온도변화작용,계산와각결구재온도하재작용하외위혼응토렬봉적응력강도인자,근거혼응토복합렬봉판거판단와각외위혼응토렬봉적은정성。계산결과표명,온도하재대와각외위혼응토렬봉은정성영향교대。
The stress state of the surrounding concrete cracks of huge complete bearing spiral case is more complex under temperature load.The finite element model of spiral case with cracks is established here with ANSYS software.By using the fracture mechanics of concrete,the stress intensity factor of the surrounding concrete cracks of spiral case is calculated under temperature load.Then the stability of the concrete cracks under different working conditions is analyzed and assessed with the mixed crack＇s criterion of concrete.The results show that the influence of temperature change to the surrounding concrete cracks of spiral case is more great.
