كليدواژه :
سد بتني وزني-قوسي , پاسخ لرزه اي و تحليل سه بعدي , اندركنش سد – مخزن – پي , رفتار غيرخطي
چكيده فارسي :
درگذشته تحليل لرزه اي سدهاي بتني اغلب به صورت ايده آل با استفاده از مونوليت هاي دوبعدي در سازوكار تحليل و طراحي در نظر گرفته شده و اثرات زلزله معمولاً با تعريف يك ضريب زلزله اعمال مي شده است. اما در سال هاي اخير تاكيد بيشتر بر تحليل هاي تاريخچه زماني غيرخطي و نيز آناليز شكست سدهاي بتني در فضاي سه بعدي شده است. همچنين با پيشرفت دانش درزمينه ي مهندسي زلزله و توسعه روش هاي دقيق تر براي برآورد شدت زلزله هاي محتمل ازجمله روش تحليل ديناميكي افزايشي، فرآيند تحليل و ارزيابي لرزه اي سازه ها كامل تر گرديده و تاثير پارامترهاي بيشتري را مي توان در ارزيابي ريسك هر سازه لحاظ كرد. در تحقيق پيش رو، پاسخ لرزه اي سدهاي بتني وزنيقوسي تحت اثر تحريكات زلزله در يك تحليل المان محدود سه بعدي بررسي مي شود. اثرات ناشي از در نظرگيري اندركنش سدمخزنپي، رفتار غيرخطي بتن و همچنين الگوهاي متفاوت شعاع قوس سد مطالعه شده و درنهايت سهم پاسخ هريك از عوامل پايداري در برابر تحريكات لرزه اي مورد ارزيابي قرار مي گيرد.
چكيده لاتين :
The Seismic analysis of concrete dams had been considered in an ideal form by means of two dimensional Monoliths in analyse and design procedures and structures had been subjected to ground motions with defining seismic coefficient. Lately, the research focus, however, has been more on linear time history analytics and fracture analysis of concrete dams in 3D space. With the advancement of knowledge in the field of earthquake engineering and the development of more precise methods for estimating the intensity of possible earthquakes, The methods of analyzing and evaluating the seismicity of the structures have been improved and the effects of more parameters can be considered in assessing the risk of each structure. In the present study, the seismic response of a concrete arch-gravity dam under the influence of earthquake stimulation is investigated in a three dimensional finite element analysis. The effects of dam-reservoir-foundation interactions are considered and the nonlinear behavior of the concrete and also the different patterns of the arc radius of the dam are studied. Finally, the contribution of response of each of the sustainability factors to seismic stimulation is evaluated. The Seismic analysis of concrete dams had been considered in an ideal form by means of two dimensional Monoliths in analyse and design procedures and structures had been subjected to ground motions with defining seismic coefficient. Lately, the research focus, however, has been more on linear time history analytics and fracture analysis of concrete dams in 3D space. With the advancement of knowledge in the field of earthquake engineering and the development of more precise methods for estimating the intensity of possible earthquakes, The methods of analyzing and evaluating the seismicity of the structures have been improved and the effects of more parameters can be considered in assessing the risk of each structure. In the present study, the seismic response of a concrete arch-gravity dam under the influence of earthquake stimulation is investigated in a three dimensional finite element analysis. The effects of dam-reservoir-foundation interactions are considered and the nonlinear behavior of the concrete and also the different patterns of the arc radius of the dam are studied. Finally, the contribution of response of each of the sustainability factors to seismic stimulation is evaluated. The Seismic analysis of concrete dams had been considered in an ideal form by means of two dimensional Monoliths in analyse and design procedures and structures had been subjected to ground motions with defining seismic coefficient. Lately, the research focus, however, has been more on linear time history analytics and fracture analysis of concrete dams in 3D space. With the advancement of knowledge in the field of earthquake engineering and the development of more precise methods for estimating the intensity of possible earthquakes, The methods of analyzing and evaluating the seismicity of the structures have been improved and the effects of more parameters can be considered in assessing the risk of each structure. In the present study, the seismic response of a concrete arch-gravity dam under the influence of earthquake stimulation is investigated in a three dimensional finite element analysis. The effects of dam-reservoir-foundation interactions are considered and the nonlinear behavior of the concrete and also the different patterns of the arc radius of the dam are studied. Finally, the contribution of response of each of the sustainability factors to seismic stimulation is evaluated.
