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渡槽運行期間受溫度應力影響的穩定性分析
張艷萍1,邢紅芳2,楊德鋒3,袁周祥3,梁棟3
(1.河南水利與環境職業學院,河南 鄭州 450008; 2.水利部海委漳衛南運河岳城水庫管理局,河北 邯鄲 056001; 3.河北工程大學 水電學院,河北 邯鄲 056038)
Stability Analysis of Temperature Stress Effects During Aqueduct Operation
 ZHANG Yanping1, XING Hongfang2, YANG Defeng3, YUAN Zhouxiang3, LIANG Dong3
(1.Henan Vocational College of Water Conservancy and Environment, Zhengzhou 450008, China; 2.Management Bureau of Yuecheng Reservoir, Zhangweinan Canal, Haihe River Water Conservancy Commission of MWR, Handan 056001, China; 3.College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056038, China)

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人民黃河
  2019,Vol. 41(9): 144
  工程建設管理
渡槽運行期間受溫度應力影響的穩定性分析
張艷萍1,邢紅芳2,楊德鋒3,袁周祥3,梁棟3
(1.河南水利與環境職業學院,河南 鄭州 450008; 2.水利部海委漳衛南運河岳城水庫管理局,河北 邯鄲 056001; 3.河北工程大學 水電學院,河北 邯鄲 056038))
doi:
Stability Analysis of Temperature Stress Effects During Aqueduct Operation
 ZHANG Yanping1, XING Hongfang2, YANG Defeng3, YUAN Zhouxiang3, LIANG Dong3
(1.Henan Vocational College of Water Conservancy and Environment, Zhengzhou 450008, China; 2.Management Bureau of Yuecheng Reservoir, Zhangweinan Canal, Haihe River Water Conservancy Commission of MWR, Handan 056001, China; 3.College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056038, China)
全文: PDF (10.00MB)
摘要: 渡槽作為重要的輸水建筑物,其運行期受溫差影響所產生的溫度應力對大型槽深混凝土結構的穩定性會帶來嚴重威脅。為研究渡槽運行期所受水壓、氣溫以及水溫耦合條件下對混凝土結構穩定性的影響,以洺河渡槽為研究對象,通過物理試驗得到的混凝土基本力學參數建立ANSYS三維有限元數值模型,研究渡槽結構在水壓及溫差作用的熱流固耦合下的穩定性,揭示渡槽結構運行期溫度、應力分布規律,并進行穩定性分析。結果表明:渡槽單受水壓作用時,應力集中區域為邊墻與底板交界位置。受溫差與水壓共同作用,水位較低時,溫度應力對結構穩定性影響較大,頂部最大位移為5 mm;水位較高時,溫度應力與水壓共同作用導致邊墻向外彎曲,頂部撓度可達5 mm;當氣溫高于水溫時,邊墻向內側彎曲,頂部撓度最大達5.4 mm,但水位達到滿槽時,受水壓力影響,頂部撓度會減小1 mm。
關鍵詞:
Abstract: As an important water conveyance building, the aqueduct is subject to the temperature stress caused by the temperature difference during the operation period, which may cause serious hidden dangers to the stability of the large depth aqueduct of concrete structure. In this paper, in order to study the influence of water pressure, temperature and both on the stability of concrete structure under the coupling conditions of the aqueduct, taking Minghe aqueduct as a research object, the ANSYS threedimensional finite element numerical model was established by the basic mechanical parameters of the concrete obtained by physical test. The stability of aqueduct structure under thermal fluidsolid coupling under water pressure and temperature difference was studied, temperature and stress distribution of aqueduct structure during operation were revealed and stability analysis was carried out. The results show that when the aqueduct is subjected to water pressure, the stress concentration area is the boundary between the side wall and the bottom plate. When the temperature difference is combined with the water pressure, the temperature stress has a great influence to the structural stability when the water level is low and the maximum displacement at the top is 5 mm; When the water level is high, the temperature stress and the water pressure work together to cause the side wall to bend outward and the top deflection can reach 5 mm; When the air temperature is higher than the water temperature, the side wall is bent to the inside and the top deflection is up to 5.4 mm. However, when the water level reaches the full tank, the top deflection is reduced by 1 mm due to the water pressure.
Key words: temperature stress; water pressure; structural stability; thermal fluidsolid coupling; aqueduct
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作者簡介: 張艷萍(1977—),女,河南鄭州人,講師,主要從事水力學與河流動力學研究工作
江苏7位数开奖历史