TWO-WAY SLAB STRIP SUPERPOSITION METHOD FOR CALCULATION OF PLATE CENTER DEFLECTION AND RECOMMENDATORY METHOD ON CRACK CHECK IN FLAT PLATE SUPPORTED BY COLUMN

In view of the outstanding problem that the stiffness formula of the flexural member in the currentCode for Design of Concrete Structures(GB 50010-2002) can only be used for one-way flexural member,the two-way slab strip superposition method for calculating deflection in the panel center of flat plate supported by column(FPSC) is presented.The calculation formulas of ratio M-(max)/ of the maximum moment(M-(max)) to the average moment() at the critical section of support of FPSC is given by finite element analysis and curvefitting.Based on the method and formula,recommendatory method on crack check for FPSC is presented.