Discussion on the Correction Coefficient of Height-to-thickness Ratio in the Code for Design of Masonry Structures
This paper indicates that the calculation accuracy of the correction coefficient μ2 for the allowable height-thickness ratio of masonry walls with doors and windows in the Code for Design of Masonry Structures(GB 50003-2011)is insufficient.According to the elastic stability theory,the correct expression of critical load Pcr of hinged variable cross-section columns at both ends is put forward,which is proved by theoretical calculation and finite element simulation.In addition,the μ2 expression of the most unfavorable arrangement of doors and windows is derived.On this basis,a more reasonable formula for calculating the allowable height-to-thickness ratio correction coefficient μ2 of perforated walls is put forward,which is more reasonable than the Code for Design of Masonry Structures(GB 50003-2011).At the same time,suggestions for amending the relevant application rules of μ2 are put forward.Based on the revised critical load Pcr of hinged columns at both ends,a more reasonable form of calculated length H0 of variable cross-section columns in the code is put forward.In order to facilitate engineering application,suggestions are put forward to modify the application provisions of variable cross-section columns of crane buildings in the code.
masonry wall with holehinged variable cross-section column at both endscritical loadallowable height-to-thickness ratio correction coefficientcalculated length
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