Tensile stresses in a masonry arch bridge

SOFiSTiK Teddy
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1

Hi everyone,

I’m analyzing a masonry arch bridge that I modeled using beam elements. The masonry material is defined with zero tensile strength.

I want to evaluate the stresses at the top and bottom of the section while excluding tensile stresses, but I’m unsure which commands or procedures to use. From what I understand, this should also allow me to determine the height of the compressive zone in the section, but I’m unsure how to correctly carry out this step.

Has anyone worked on a similar analysis or can suggest how to properly exclude tensile stresses and obtain the compressive zone height?

Thanks in advance for your help!

2

Use concrete material CONC with manually defined masonry parametrs. Actually eurocode assume very similar material models for those two materials. You can also define stress-strain realationship in AQUA by SSLA commands for ultimate and serviciabilty states.

Then perform non-linear analysis in ASE by adding SYST PROB NONL
with turming on nl-beams by NSTR s1 sl sl

3

Perhaps the representation of the support line / thrust line in the masonry might help you as well, see picture.

Thrust line
Thrust line675×770 9.28 KB