COMPARATIVE ANALYSIS OF THE YIELD MECHANISM OF STRONG COLUMN AND WEAK BEAM FROM DOMESTIC ANDFOREIGN CODES
For the concept of the design method of strong column weak beam,we respectively review the code of technical specification for concrete structures of tall building(DBJ/T 15-92-2021)from Guangdong in China,the na-tional code for seismic design of buildings(GB50011-2010)from China,and other seismic codes from United States,European,and Japan.From the comparison of the bending moment increase coefficient of the column end and the floor,it is pointed out that the code from Guangdong is different from other codes in the internal force adjustment measures.In the seismic performance design,the yield mechanism of strong column and weak beam is realized through the importance coefficient of components and the utilization coefficient of bearing capacity.It is easier to ad-just the column-beam safety factor ratio under super earthquakes,and we draw the specific provisions of the floor re-inforcement within the width of the end flange of the frame beam,so as to reduce the amount of beam reinforcement.Basing on the design provisions of each specification,a 6-layer RC frame structure is carried out the Pushover analy-sis and dynamic elastoplastic analysis.The amount of beam and column reinforcement,column-beam safety factor ratio,beam and column damage,and energy consumption are comprehensively compared.The effect of strong col-umn and weak beam in each specification of RC frame structure is analyzed,in which the column reinforcement quantity and column beam safety factor of the code from Guangdong are relatively large,and the effect is good in real-izing the yield mechanism of strong column and weak beam.
RC frame structurestrong column and weak beamcolumn end bending moment increase coefficientcast-in-place floor slabcolumn-beam safety factor ratio