Concepts and Principles for the Application of Nonlinear Structural Analysis in Bridge DesignThis report is concerned with the broad problem of how to make effective use of nonlinear structural analysis in practical design, with emphasis on bridge structures. The report looks at several aspects of this broad problem. Some of these aspects are as follows: (1) The reasons for using structural analysis, and the differences between linear and nonlinear analysis; (2) Strength based versus damage based design; (3) Demand-capacity concepts for design, and decision making based on demand-capacity comparisons; (4) The importance of the behavior concept for the structure, and the value of capacity design; (5) Modeling for linear and nonlinear analysis; and (6) Unanswered questions about how to use nonlinear analysis effectively in design, and the steps we must take to develop answers. |
Common terms and phrases
axial force beam element behavior concept behavior mode bending moment buckling calculate demand CALIFORNIA Caltrans capacity design capacity values chapter column complex components and modes compression computer program connection cross section damage based design demand and capacity demand values demand-capacity comparisons demand-capacity measures DRAIN-2DX ductility demand Element Type estimate example expansion joint finite element force demands geometric nonlinearity hence hinge region hinge rotation interaction lateral load LIBRARY linear analysis Linear Elastic linear structural analysis material nonlinearity maximum mode shapes modes of behavior nodes nonlinear behavior nonlinear dynamic analysis nonlinear model P-A analysis P-A effect P-V-M demands performance analysis plastic hinge prescriptive rules ratio Rayleigh damping reinforced concrete remain essentially elastic response spectrum RSITY SAN DIEGO secant stiffness shear force shear link shown in Figure simple specified static pushover analysis strength based design strength capacity strength demands true large displacements truss bar Type 15 viscous damping zero length