硫酸盐侵蚀下混凝土的非经典非线性效应变化_王晓惠.pdf

( ) 47 2 Vol. 47, No. 2 JOURNAL OF NANJING U NIVERSITY 2011 3 Mar. 2011 w ( NAT URA L SCIENCES) 1 1 1 2 王晓惠 , 刘晓宙 , 龚秀芬 , V. E. Nazarov ( 1. , , , 210093; 2. Institute of Applied Physics, Russian Academy of Science, Nizhny Novgorod, 603950, Russia) : , , . , . , . , . , , . : , , , : O 4221 7 The changes of the nonclassical nonlinear effect under erosion of sulfate Wang X iao-H ui 1 , L iu X iao-Zhou 1 , Gong X i u-Fen 1, V. E . N az ar ov 2 ( 1. Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing University, Nanjing, 210093, China; 2. Institute of Applied Physics, Russian Academy of Science, Nizhny Novgorod, 603950, Russia) Abstract: When concrete is under sulfat e erosion and the w et and dry cycles, the internal micro-damage and performance degradation occur . Studies on structure concret e that is under sulfate erosion and the wet and dry cycles is not enough, the research at present is focused mainly on the mechanical properties of structure concrete. T here are few w orks on the internal micro-damage and the performance degradation of structural concrete. Concrete nondestructive testing techniques are generally using linear ultrasonic method. T he nonlinear acoustic method used to obtain the concrete damaging and deteriorating law has just started. Rock, concret e and other nonlinear mesoscopic elast ic solids show the nonclassical nonlinear phenomena, including the amplitude of the o