TY - JOUR
ID - 240522
TI - Reliability Analysis of Fan Type Cable Stayed Bridges Against First Passage Failure under Earthquake Forces
JO - Journal of Seismology and Earthquake Engineering
JA - JSEE
LA - en
SN - 1735-1669
AU - Khan, R.A.
AU - Datta, T.K.
AU - Ahmad, S.
AD - Civil Engineering Department, Jamia Millia Islamia
AD - Department of Civil Engineering, IIT Hauz Khas New Delhi
AD - Applied Mechanics Department, Indian Institute of Technology
Y1 - 2005
PY - 2005
VL - 7
IS - 3
SP - 147
EP - 157
KW - First Passage Failure
KW - Reliability analysis
KW - Crossing Analysis
KW - Fan Type Cable Stayed Bridges
DO -
N2 - A reliability analysis of fan type cable stayed bridges against first passage failure under earthquake forces is performed using the method of crossing analysis and the basic theory of reliability. Failure of the bridge deck being the point of interest, the bridge is modeled as a beam supported on springs at different points. The stiffnesses of the springs are determined by a separate 2D static analysis of cable-tower-deck system. The analysis provides a coupled stiffness matrix for the spring system. Using a frequency domain spectral analysis, the power spectral density functions of bending moments at different points of the deck are obtained. Using the first few moments of the power spectral density function, the crossing analysis is carried out to obtain the conditional probability of first passage failure of the bridge deck for a given earthquake ground motion intensity (expressed as r.m.s. ground motion and related to the magnitude of earthquake by an empirical relationship). Probability of occurrence of different magnitudes of earthquake is then combined with the conditional probability of failure to obtain the reliability of the bridge deck against first passage failure. A three span double plane symmetrical fan type cable stayed bridge of total span 689.0 m, is used as an illustrative example. The reliability against first passage failure of the bridge deck is obtained under a number of parametric variations.
UR - http://www.jsee.ir/article_240522.html
L1 - http://www.jsee.ir/article_240522_6dc5f769df3afcb18607e569982d0c76.pdf
ER -