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pkpm系数(Coefficient of PKPM).doc

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pkpm系数(Coefficient of PKPM)

pkpm系数(Coefficient of PKPM) 1, determination of earthquake proof: The strength, structure type and height of the reinforced concrete house shall be determined according to the anti-regulation 6.1.2 or the high regulation 4.8 to determine the seismic grade of the project. But here are some things to note: (1) the above aseismatic grade is c type construction. If it is a, b and d, the seismic grade should be adjusted according to the specification. (2) when approaching or equal to the boundary height, the seismic grade shall be determined carefully in combination with the irregularity of the house and the site and foundation conditions. (3) when the transformation layer = 3 or more, its frame pillar, the shear wall at the bottom of the level of aseismic walls should strengthen department according to the resistance gauge article 6.1.2 or high rules 4.8 check using seismic grade for improvement of the level, have to TeYiJi dont adjust. (4) the seismic grade of the shear wall structure of short limbs should also be adopted at the first level according to the anti-regulation 6.1.2 or the anti-seismic grade of 4.8. However, it is noted that the structure of multi-layer short shear wall is not improved. (5) attention: steel structure, masonry knot has no seismic grade. The 5 can be selected and the seismic construction measures are not considered. 2. Selection of mode combination number: In the calculation of earthquake force, the selection of mode number should be the mode of vibration mode. But here are a few things to note: (1) the number of modes of vibration cannot exceed the total number of vibration modes inherent in the structure, because one floor has only three effective dynamic degrees of freedom, so a floor can be selected for up to three modes. If the number of vibrational modes is more than the total number of modes, then the seismic force calculation will be abnormal. (2) for the structure of the coupling calculation, the number of vibrational modes

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