科创中国

Seismic response analysis of a CFST arch bridge: Considering structure-foundation interaction

• 摘要：

  A viscoelastic artificial boundary was constructed to simulate radiation damping in a semi-infinite medium and the elasticity recovery capacity of the medium at the far field. The seismic response of a deck-type concrete-filled steel tube(CFST)arch bridge having a 430 m span was analyzed using the program ANSYS. Several forms of foundation were incorporated into the model. The results show that the natural frequency and the seismic response stress both decrease and seismic displacements become larger when considering the structure-foundation interaction. The seismic stresses in key cross sections change little, the stresses in the steel tube decrease less than 1% and the stresses in the concrete decrease 3.5%. The influence of rock to bridge's seismic response is greater than that of the concrete foundation itself. The dangerous cross-section of the lower chord is at the skewback, that of the top chord is at the point 3/8 distant from the skewback and that of the deck is at the span center.

• 作者：

  Zhou Yong;Zhang Bo;Li Shu-Cai;Zhang Qing-Song

• 刊名：

  Zhongguo Kuangye Daxue Xuebao Journal of China University of Mining and Technology

• 在线出版时间：

  2008