ChiEngr
Structural
- Oct 19, 2021
- 72
Hello,
I am designing a substation support structure, and I was wondering if anybody had any guidance or experience with orthogonal combination of seismic loads when using the Equivalent Lateral Force procedure. Per ASCE 113, Section 3.1.7.8, it states a series of design load combinations using the 100/40/40 rule. I am using the ELF and have never used the 100/40/40 rule unless using a dynamic analysis procedure. Is this a potential mistake in ASCE 113, or does the orthogonal combination of seismic load vectors apply even for the ELF?
I am designing a substation support structure, and I was wondering if anybody had any guidance or experience with orthogonal combination of seismic loads when using the Equivalent Lateral Force procedure. Per ASCE 113, Section 3.1.7.8, it states a series of design load combinations using the 100/40/40 rule. I am using the ELF and have never used the 100/40/40 rule unless using a dynamic analysis procedure. Is this a potential mistake in ASCE 113, or does the orthogonal combination of seismic load vectors apply even for the ELF?