This paper proposes a simplified analytical model for seismic response prediction of concentrically braced frames. In the proposed approach, a multistory frame model is reduced to an equivalent shear-building one by performing a static pushover analysis. The conventional shear-building model has been improved by introducing supplementary springs to account for flexural displacements in addition...

Regulation for calculating earthquake forces building in Indonesia keep developing. SNI 1726-2019 is the lastest regulation which has a return period of 2500 years, while 1726-2002 500 years. So old have to be strengthened. Steel braces good option resist lateral forces. In value response modification factor (R), overstrength (Ω0), and deflection amplification (Cd) eccentrically braced concrete...

Different types of structural analyses, first order elastic, second order elastic, first order plastic, and plastic zone analysis, were used to simulate the behaviour of 3 portal frames constructed from cold-formed rectangular hollow sections. All analyses underestimated the magnitude of the deflections of the frame mainly due to the non-inclusion of flexible joint behaviour. A second order ine...

when structures are subjected to strong ground motion excitations, structural elements may be prone to yielding, and consequently experience significant levels of inelastic behavior. the effects of inelastic behavior on the distribution of peak floor loads are not explicitly accounted for in current seismic code procedures. during recent years, many studies have been conducted to develop new de...

Steel braced frame systems (SBFs) having high stiffness and strength are commonly utilized due to their resistance lateral seismic forces in regions with seismicity. In this study, concentrically frames (CBFs) different bracing configurations used obtain the significance of pulse period associated near-fault (NF) ground motion by time-history dynamic analysis. Besides, far-fault (FF) motions al...

Dual systems of steel moment frame and reinforced concrete shear wall have combined the advantages of steel frames and reinforced concrete shear wall. These walls have increased the lateral stiffness of steel frames and have reduced seismic demands on steel frames thus providing opportunities to use such system. In this research intermediate dual system of steel moment frame was chosen with int...

This paper presents an optimization-based method for computing a minimal bounding ellipsoid that contains the set of static responses of an uncertain braced frame. Based on a non-stochastic modeling of uncertainty, we assume that the parameters both of brace stiffnesses and external forces are uncertain but bounded. A brace member represents the sum of the stiffness of the actual brace and the ...