Dynamic assessment of the long-span cable-stayed bridge and traffic system subjected to multiple hazards

................................................................................................................................................. ii ACKNOWLEDGEMENT ........................................................................................................................... iv DEDICATION ............................................................................................................................................. vi TABLE OF CONTENTS ............................................................................................................................ vii LIST OF TABLES ........................................................................................................................................ x LIST OF FIGURES ..................................................................................................................................... xi CHAPTER 1 Introduction ....................................................................................................................... 1 1.1 Motivation of the dissertation research ......................................................................................... 1 1.2 Scientific context .......................................................................................................................... 2 1.3 State of the art of the research on LSCSBs under dynamic loadings ........................................... 8 1.4 Limitations on the dynamic analysis of LSCSBs subjected to multiple dynamic loadings ........ 17 1.5 Significance and contributions of the dissertation research ........................................................ 21 1.6 Organization of the dissertation .................................................................................................. 25 CHAPTER 2 Dynamic simulation of long-span bridge-traffic system subjected to combined service and extreme loads ....................................................................................................................................... 29 2.1 Introduction ................................................................................................................................ 29 2.2 Modeling of the long-span bridge and the road vehicles ............................................................ 29 2.3 Simulation of major service and extreme loads for the bridge-traffic system ............................ 33 2.4 Fully-coupled bridge-traffic dynamic analytical model ............................................................. 40 2.5 Numerical example ..................................................................................................................... 45 2.6 Conclusions ................................................................................................................................ 68 CHAPTER 3 A hybrid simulation strategy for the dynamic assessment of long-span bridges and moving traffic subjected to seismic excitations .......................................................................................... 71 3.1 Introduction ................................................................................................................................ 71 3.2 EMTL-FE approach for nonlinear seismic analysis ................................................................... 73 3.3 Numerical demonstration ........................................................................................................... 79 3.4 Conclusions ................................................................................................................................ 97 CHAPTER 4 Time-progressive dynamic assessment of abrupt cable breakage events on cable-stayed bridges 98 4.1 Introduction ................................................................................................................................ 98 4.2 Nonlinear dynamic simulation methodology with stochastic traffic loads ............................... 100 4.3 Numerical example and discussions ......................................................................................... 108 4.4 Response envelope analysis ...................................................................................................... 123