Equivalent earthquake load and modal problem

S

sereze

New Member
Greetings, There is 3 times more difference between Modal Analysis and Equivalent Load in the Project. I removed the beam, threw a curtain, same result. Where could it originate from? Note: There are too many user-defined loads in the project. Thanks
 
Hello, if you mean the difference between the earthquake loads calculated according to the Equivalent Earthquake Load method and the Modal combination Method in the Dynamic Analysis Report, this difference is due to the decrease in the period value due to the upper limit control brought to the Natural Vibration period in the calculation according to the Equivalent Earthquake Load and consequently the increase in the total earthquake load. (TBDY 2018 Article 4.7.3.2)
 
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