火灾作用下钢筋混凝土连续梁内力重分布研究.pdf

17 4 V o.l 17, No. 4 2008 8 JOURNA L OF NATURAL D ISA STER S A ug. , 2008 : 1004-4574 2008) 04- 0078- 07 王振清, 苏 娟, 梁文彦, 白丽丽 , 15000 1) : , , , , , , : ; ; ; ; : TU 375. 1 : A Investigation into internal force redistribution into reinforced concrete continuous beam in fire WANG Zhen-qing, SU Juan, L IAN G W en-yan, BA I L -i li H arb in E ngineering U n ivers ity, H arb in 15000 1, Ch ina) Abstract: T he non- linear fire- resistant properties o f continuou s beam s w ere ana lysed, according to the const itutive m odels o fm ateria l at d ifferent tem peratures. By ca lculating the u ltmi ate loads and m echanica l properties of reinforced concrete continuou s beam at h igh-tem perature, the change law of internal force redistribut ion and deform at ion w ere analyzed for d ifferent load ing posit ions and levels and d ifferent num bers of heated spans. The resutt show s that, in heat ing process, the internal force redistribution and the form at ion of plastic h inges at h igh tem perature in cont inuou s beam w ere caused by different load ing posit ion and level, wh ich can change the fa ilure pattern of structure K ey words: fire; continuou s beam; ultmi ate loads; in ternal force red istribut ion; non- linear , , , , , , , , , , , , , , , : 2008- 03- 16; : 2008- 06- 2 1 : 200602 170 10 ) : 1962- ) , , , , . E-ma i:l w angzh enqing@ hrb eu. edu. cn 4 : 79 , , [ 1- 5] , , ,