《钢筋混凝土》框架结构超强研究_翟长海.pdf

28 1 Vol128, No11 2007 1 Journal of Building Structures Feb1 2007 : 1000-6869( 2007) 01-0101-06 1 1, 2 翟长海, 谢礼立 ( 1. , 150090; 2. , 150080) : , , Pushover , , : , ; Pushover ; , 2 : ; ; ; Pushover ; ; :TU37514 TU352111 : A Stud on overstrength of RC frame structures 1 1, 2 ZHAI Changhai , XIE Lili ( 1. School of Civil Engineering, Harbin Institute of Technolog , Harbin 150090, China; 2. Institute of Engineering Mechanics, China Seismological Bureau, Harbin 150080, China) Abstract: Overstrength pla s an important role in keeping satisfactor performance of structures during strong earthquake. Using a number of ground motions and the RC frame structures designed according to Chinese seismic code, the global capacit envelopes and overstrength of RC frame structures attributing to redistribution of internal forces are studied b means of incremental d namics anal sis and Pushover anal sis. It is concluded that when using incremental d namic anal sis to determine the global capacit envelopes of structures, the difference between the capacit envelopes caused b different local site conditions is small. And the difference between the overstrength obtained from incremental d namics anal sis and Pushover anal sis increases with the stories. Before further detailed investigations, it can be conservativel considered that the minimum overstrength factor of RC frame structures, which are designed according to Chinese seismic code, is 2. Keywords: overstrength; RC frame structures; incremental d namics anal sis; Pushover anal sis; r