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I am designing a base-isolated building in ETABS and my target period is 2.5 sn according to ASCE 7-10 equations. For my calculations I am using mass which is given by ETABS. In program I am defining ısolators as link elements and assigning to point springs. My problem is I know effective...

Hi everyone, I have problems with using point spring. I am modelling a base-isolated building in ETABS so at first, I have defined link properties for rubber isolator then I assigned it to +Z and -Z directions in the Point Spring Property Data form. My problem is when I run the anaylsis, joint...

I mean it is required to ensure moment ratio at beam to column connections and strong column-weak beam criteria for highly ductile members for SMF design in AISC 341-10. ASCE 7-10 Chapter 17 is just giving R value as 3/8 of the factor that is permitted for design of conventional, fixed-base...

Hi everyone, I am designing a base-isolated SMF. I am confused about Strong Column-Weak Beam Criteria in codes for SMF desing. Superstructure in a base-isolated building must be essentially elastic under design earthquake. So when designing superstructure, do I need to ensure strong column-weak...

Actually I didn't give the sizes, I used auto-select list for all members and used design tab. As I said, I'm new in ETABS and I am trying to figure out by watching csi videos. I attached the file, if you can look at it, I appreciate. By the way period is...

Hi everyone, I am a new ETABS user and I was designing an eight-story steel structure but I realized that my structure period is too large than I decided to model a simple one story steel structure which has moment connections along perimeter and pinned connections at inner beam. All secondary...

So, I can design secondary beams and beams that are part of the gravity-framing system as composite beams but the primary girders that have moment connection shouldn't show conposite behavior, but some studs to provide connectivity at those girders also OK. Did I understand right? Thank you...

Hello everyone, I am a MSc student and designing a SMF building on Etabs, but I am having hard times with designing steel decking with a concrete topping. My structure has moment connections in perimeter and rest of the column-beam connections are all pinned.I am assigning floor as filled deck...