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Showing results for tags 'story stiffness'.
Found 5 results
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How to overcome story drift ? If max drift value at story x is 1/40 and direction is x then what changes should be made on that story x ?
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how we can calculate story stiffnes in ETABS??
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Aoa, I am facing a problem while designing a 5 story commercial structure in zone 2B of Pakistan. The structure consists of a completely covered Basement and 3 tower like structure above basement for the purpose of shops. Now the problem here is dimensions of each tower consists of length of shops is 160 ft, height 50 ft and width is only 18 ft. this is client's requirement. I have attached a rough drawing for understanding. The structure is behaving like flexible towers above a stiff podium. What can be possible ways to tackle this situation. Distance between these is 39 ft.
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According to IS code soft story should be design with 2.5 times the base shear. So, I multiplied the mass source factor by 2.5 in etabs. but base shear didn't even increased to twice. Maybe I should increase the mass source factor until the base shear of soft story building is 2.5 times that of normal building. I have many questions? Am I doing it right? Is my understanding correct. Is there more appropriate method to do it? Are columns only structural elements I should separately design for for soft story? or I should design beams and slabs too for soft story. Please somebody clarify my questions and suggest best way to design building with soft story. and also common errors and misunderstanding regarding such design?
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how to calculate the storey stiffness?and storey strength?
