Infobase and Formula of a Two-Step-State Computation Techniqueof RC Earthquake-Resistance Frame Systems using the Pushover Analysis Conception
To memory of my research supervisor Victor G. BednyakovA formulation of an applied earthquake-resistance estimation technique for RC frame building is presented by the author. A feature of the technique is a patterningof an analysis algorithm for research objects by dividing it into consecutive steps (stages). The subject field novelty consists in forming computation stages not onlytaking into account a strength of earthquake action but also for separating of a calculation procedure of RC members reinforcement parameters under seismic loads.The considered approach takes into account that in correctly calculated and designed RC members at a strong (rare) earthquake only hinge zones are damaged asrule. It is suggested that parameters of longitudinal reinforcement of RC members to determine under operating loads and weak (frequent) earthquakes combinationsusing the Response Spectrum Technique in Seismic Building Design Code SNiP II-7-81* (2000 ed.) formulation (with Seismic-Force-Reduction Factor K1 equal tounity). And under strong a (rare) earthquake the author offers to estimate an authenticity of hinges zones computational parameters and their web reinforcementcongestion using a convenient nonlinear static (Pushover) analysis procedure (NSP). The technique formulation is preceded by a review of general features of NSPswhich constitute the foundation of Pushover-based methodology, and the ontology of Russian two-step-state design experience of earthquake resistance structures.