Should we understand NMS=5,6,7,8 or 1,2,3 from the expression NMS>4

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eissenhover

New Member
Hello, for example, should we understand BYS = 5,6,7,8 from the expression BYS >4 or should we understand BYS = 1,2,3.
 
Re: BYS>4 should we understand BYS=5,6,7,8 or 1,2,3 Hello. BYS>4 means that it can be BYS=5, 6, 7, 8. The height limits are shown in the table pertaining to this in the regulation. As the BMS grows, the total height of the building decreases, so the requirements of the regulation become lighter. BYS=1 buildings are classified as "tall building" and the analysis design process is completely different. Chapter 13 is entirely devoted to this. With the formula 4.7.3.4, the first dominant vibration period of the structure is found by approximate method. Since it is found by the approximate method, it is only allowed if BYS=7 or 8 in buildings with high earthquake acceleration and structural importance coefficient such as DTS=1, 1a, 2, 2a. This article explains that. In curtain+frame system, you will get Ct=0.07. These issues are the most basic issues like the ABC of the new regulation. If you are a project designer, you should definitely learn these subjects.
 
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