拱橋穩(wěn)定性研究.pdf

1、長安大學(xué)碩士學(xué)位論文拱橋穩(wěn)定性研究姓名：強(qiáng)朝平申請學(xué)位級別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：楊炳成2001.5.1A b s t r a c tT h ea r c hb r i d g e ss p a ni s S Ol a r g ea n dt h el o n g ．t h i n i s S O g r e a tt h a t t h eq u e s t i o n so f a r c h b r i d g e s

2、 t a b i l i t yc o m e o u ti n c r e a s i n g l y 。D e p e n d i n g o n t h ec a u s et h a tm o d e m a r c h e sa r ep a r a b o l i ca n d c a t e n a r ym o s t l ya n dt h e ya l w a y sb e a rw i t ht h ev e r

3、t i c a ll o a d i n g ，S Ot h ec o n c l u s i o nt h a tt h ec o e f f i c i e n to f s t a b i l i t yo f c i r c u l a ra r c h e s i nr a d i a ll o a d i n g d o n o t r e p l a c e a l la r c h e si sp o i n t e d

4、 o u t 。T h i s t e x t p u t s f o r w a r d t h e c o n c e p t o ft h e e q u a l l o a d i n g f o r I n - p l a n eb u c k l i n g o f a r c h b r i d g e s ，t h e b u c k l i n go f c i r c u l a r a r c h e sC a n

5、 a s s i m i l a t ep a r a b o l i ca n dc a t e n a r ya r c h e su s i n gt h et r a n s f o r m i n go f l o a d i n gf o r me v e ni ft h ea r r o w -s t r i d er a t i oi sl a r g e 。T h e l a t e r a lb u c k l i

6、n go f a r c h e sb r i d g e sh a p p e n s e a s i l yd u r i n gc o n s t r u c t i o n 。T h i s p a p e r a c c u r a t e l y c a l c u l a t e st h ev e r t i c a ld i s t o r t i o n f u n c t i o no fc a t e n a r

7、 ya r c h e s v i at h e T h a l e rt r a n s f o r m a t i o n ，g i v e s t h e t r e n da n di n f l u e n c ed e g r e eO Ht h ea r c ht y p e 、t h ea r r o w - s t r i d er a d i oa n dt h er a d i oo f t h er e s i

8、s t i n g —t o r s i o n s t i f f n e s s o fa r c h e s a n d c r o s s r e s i s t i n g —t w i s t i n g s t i f f n e s s f o r l a t e r a Ib u c k l i n g o f a r c h e s b r i d g e s ，e s p e c i a l l yi n t r

9、o d u c e st h ei n f l u e n c eo f t h ea r c h —a x i sc o e f f i c i e n t s f o r l a t e r a l b u c k l i n g o fa r c h e s b r i d g e s ，a n d f i n a l l y p r e s e n t s t h ep r a c t i c a l c a l c u l a

10、 t i n g m e t h o d s f o r t h eb u c k l i n g o f c a t e n a r ya r c h b r i d g e s 。U s i n g t h ef o r m u l a i nt h i sp a p e rC a nc a l c u l a t et h ec o e f f i c i e n to fs t a b i l i t yo na r c h b

11、 r i d g e se a s i l ya n dn i c e l y ，t h e e r r o rc o m p a r e d w i t hF E M i sS Os m a l lt h a tt h ef o r m u l a c a r lb ea p p l i e d e x a c t l y o n e n g i n e e r i n g 。K e y w o r d s ：t h e c o e