【摘要】 介绍了目前高拱坝安全评价的几种方法,指出了现存拱坝安全度评价方法的缺点。提出基于有限元分析结果的高拱坝安全度评价体系,研究了坝体裂缝对大坝工作性态的影响,给出了坝体内容许裂缝长度。结合溪洛渡高拱坝工程,阐述了基于弹性或弹塑性有限元分析并综合考虑大坝坝体、建基面和坝基岩体破坏的拱坝安全度评价方法,强调了高拱坝长期安全度评价的重要性。更多还原

【Abstract】 Main problems of the methods currently used for the high arch dam safety evaluation are discussed.Based on the analysis of the finite element method,a new system of the high arch dam safety evaluation is proposed.The influences of the existing cracks on dam working behavior are studied,and the allowable length of the crack in the arch dam is given.With the example of Xiluodu arch dam,comprehensively considering the failure of the dam-body,dam-abutment and dam foundation,this paper establishes a new method of the arch dam safety evaluation which is based on the elastic or elastic-plastic finite element analysis,and emphasizes the importance of the long-term safety evaluation for high arch dams.更多还原