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20.中心均匀局部受压的承载力如何验算? 中心均匀局压是局部受压的基本情况。其承载力的计算公式为: N_l≤γfA_l 式中 N_l——局部受压面积上轴向力的设计值; γ——砌体局压强度提高系数; A_l——局部受压面积。计算的关键在于局压强度提高系数。七十年代前我国采用苏联规范的公式:
20. How to calculate the bearing capacity of the center evenly local pressure? The central uniform pressure is the basic situation of local pressure. The calculation formula of its bearing capacity is: N_l≤γfA_l where N_l is the design value of the axial force on the local compressive area; γ—the coefficient of increase in masonry compressive strength; A_l—the area of local compression. The key to the calculation lies in the coefficient of increase in the compressive strength. Before the 1970s, China adopted the Soviet norm formula: