Since the building is DTS = 1 and all earthquake seismic loads are covered by reinforced concrete walls, it is necessary to control the curtain overturn shearwall overturning in both directions. This control is the stage that allows the final decision to be made on the R coefficient. If the conditions given below are not met, (4/5)R must be used instead of the selected R. These two conditions are as follows:
(a) The carrier system in base overturning moment MDEV taken by a single screen or steel receives base stall torque of the bracing frame M DEV total floor tilting moment occurring in shear wall or steel braced frame in the structural system shall not be more than 1/3 of the total base overturning moment Mo resulting from seismic loads for the entire whole building in that direction M o ' s third is no greater than.
(b) Construction each side axles located screen / screen or steel braced frame / receives The sum of the base overturning moment of the frames MDEV or MDEV'the sum of all, that the direction in total floor tilting moment occurring in s taken by the shearwalls or steel braced frames on each side axis of the building shall not be less than 1/6 of the total base overturning moment Mo resulting from the seismic loads for the entire building M o ' s 1 It will not be less than / 6whole building in that direction. .
This control is done automatically by taking R = 1 by the program.
Since it is necessary to make an analysis to see the results of this control, it is necessary to make do an analysis after selecting R and D and pay attention to the warnings in the curtain tipping controls control of shearwall overturning moment section in the earthquake regulation report.
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