DYNAMIC ANALYSIS OF RAILWAY STEEL ARCH BRIDGE A DISSERTATION Submitted in partial fulfillment of the ,requirements for the award of the degree of MASTER OF TECHNOLOGY in EARTHQUAKE ENGINEERING (With Specialization in Structural Dynamics) By SANGEETA PANDEY x DEPARTMENT OF EARTHQUAKE ENGINEERING INDIAN INSTITUTE OF TECHNOLOGY ROORKEE ROORKEE-247 667 (INDIA) JUNE, 2006