Computer-based nonlinear analysis method for seismic performance assessment of 3D frameworks

ABSTRACT: This paper presents an integrated system for advanced structural analysis and seismic performance evaluation of 3D steel and reinforced concrete building frameworks with rigid or flexible connections. The advanced non-linear inelastic static analysis employed herein uses the accuracy of the fiber elements approach for inelastic frame analysis and address its efficiency and modeling shortcomings both to element level, through the use of only one element to model each physical member of the frame, and to cross-sectional level through the use of path integral approach for numerical integration of the cross-sectional nonlinear characteristics. The proposed software is presented as an efficient, reliable tool, ready to be implemented into design practice for advanced analysis and pushover analysis of spatial frame structures. means of a static inelastic analysis, and comparing these demands to available capacities at the per-formance levels of interest. In this direction, the new design documents have developed modeling procedures, acceptance criteria and analysis pro-cedures for pushover analysis. Seismic demand