MOTIVE

Understanding Creep Analysis Through Flexibility Methods

Written by Seungwoo Lee, Ph.D., P.E., S.E. | Oct 18, 2023 12:48:22 AM

Creep Analysis 3



The blog article of Creep Analysis 3 showed how Dr. Ghali et al. explained the creep analysis by flexibility methods.


To better understand the creep behavior, solve the previous example in a less efficient way. Here, different sign conventions will be applied.

 

 
Sign Convention
 

At time t0, the immediate displacements/rotations for member 1 due to uniform loads are

 

At time t1, the immediate displacements/rotations due to uniform loads at span 2 are (MIDAS file ex4.2A)

 

The signs in the table are according to the global axis. Converting into element local axis,

 

Restrained displacements/rotations are

 

Let

Restrained member end forces are

 

The remaining calculations are the same as the previous example.