溫度、滲流對混凝土大壩影響效應研究

1、論文題目：溫度、滲流對混凝土大壩影響效應研究專業(yè)：固體力學碩士生：曹海波（簽名）指導教師：張嘉凡（簽名）摘要隨著我國經濟建設的發(fā)展，越來越多、越來越高的混凝土大壩拔地而起，水利工程在國民經濟建設中的重要地位益發(fā)凸顯。滲流和溫度是影響混凝土大壩穩(wěn)定性的主要因素，必須深入研究對大壩應力和位移的影響效應，制定科學的防范措施，確保大壩安全運行。本文以公伯峽水電站進水口5#壩段為分析對象，采用ABAQUS有限元大型工程軟件，分別運用單應力場模塊、

2、應力場和滲流場耦合模塊、應力場和溫度場耦合模塊，建立了相應的三維有限元分析模型，對混凝土壩的溫度場、應力場及位移場進行數(shù)值計算。分析不同水位對混凝土大壩位移的影響，確定大壩及壩基的塑性區(qū)、應力集中區(qū)及應力值最大區(qū)；得到大壩的孔隙壓力、揚壓力、應力與位移隨水位的變化特性；研究大壩的溫度場、應力場及位移場的分布規(guī)律。結果表明：滲流產生的孔隙壓力及揚壓力與溫度變化引起的溫度應力都會對混凝土大壩的位移產生重要的影響。并將計算值與大壩監(jiān)測數(shù)據進行

3、對比，分析滲流與應力、溫度與應力的耦合作用對壩體運行的影響效應，揭示混凝土大壩產生位移的本質原因，為大壩的安全評價提供了重要依據。關鍵詞：混凝土壩溫度滲流有限單元法研究類型：基礎應用Subject:Subject:Subject:Subject:StudyStudyStudyStudyononononthethethetheEEEEffectffectffectffectssssofofofofTTTTemperatureemperat

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