How to design Steel Plate-I Girder as per AASHTO LRFD. Kindly explain if different steel grades can be assigned to flange and web plates.
Answer:
In midas Civil, the steel design is supported only for the sections defined from the 'DB/User' tab in the Section dialog in which the built-up sections can be defined by the 'User' type as below. Both rolled sections and built-up sections can be designed by the 'Steel Design' function.
![](/helpdesk/File/Get/9824832)
As for the hybrid steel sections (different steel grade for flange and web), it is not supported for the steel design. Just in case it is a composite plate girder (steel beam & concrete slab), the hybrid steel sections are supported for the composite girder design.
![](/helpdesk/File/Get/9824833)
![](/helpdesk/File/Get/9824834)
As for the hybrid steel sections (different steel grade for flange and web), it is not supported for the steel design. Just in case it is a composite plate girder (steel beam & concrete slab), the hybrid steel sections are supported for the composite girder design.
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