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Tutorial

Name:

Cable-stayed bridge modeling

Description:

Basic guidelines for modeling of cable-stayed bridges.

Program:

CSiBridge

Version:

all

Model ID:

na

Load Assignment

The proper assignment of loads would depend on the actual sequence of loading and on the various load combinations that you need to evaluate. A simple example for illustration:

Let's say that you need to check a cable-stayed bridge for wind loading (static analysis) and for human induced vibrations (time history analysis). Then you could proceed as follows:

  • To analyze the structure for wind loads, create a nonlinear static load case in which the wind loads will be applied. This wind load case should be using stiffness at the end of load case "A".
  • To analyze the structure for human-induced vibrations, create a time history load case in which the time-variable loading will be applied. This "human-induced vibrations" time history load case should be using stiffness at the end of load case "A". If modal time history is used, the modes should be again based on stiffness at the end of load case "A".
  • Other load cases, for earth pressure, moving loads, etc. would be defined similarly, i.e. using stiffness at the end of load case "A".

See Also