Effect of Plastic Hinge Properties in Pushover Analysis of Reinforced Concrete Plane Frames

Abstract

The four-bay, five-story Reinforced Concrete (RC) frame with two-dimensional beams and a column moment frame system that is vulnerable to Mosul, Iraq's seismic activity is examined. A plastic hinge symbolizes the member yielding failure mode in columns and beams. Utilizing SAP2000 software (V.16), the pushover study was carried out to confirm the code's fundamental goal of life safety performance under seismic events. By combining the seismic hazard with the inelastic structural analysis, one may determine the anticipated seismic performance of a structure. An essential outcome of pushover analysis for both brittle (force-controlled) and ductile (deformationcontrolled) actions of the plastic hinge behavior is the base shear vs structure's tip displacement curve. The pushover analysis, using a variety of alternatives for the plastic hinge behavior, showed that the plastic hinge formed because of its brittle nature placed it in the more severe category. All of the plastic hinges created in the beams as a result of brittle behavior are placed in the risky branch ("Collapse Prevention CP") of the plastic hinge acceptance criterion. This necessitates increasing the shear strength of the beams.

Study on Seismic Mechanical Properties of Reinforced Concrete Energy Dissipation Wall and Seismic Response Analysis of Structure

“…Complete ductility means that the structure can form a plastic hinge in some specific parts under the expected small probability earthquake, so that the ductility performance of the structure can be fully played, and other parts except these specific plastic hinge areas do not occur inelastic deformation. Equation (11) expressed the maximum ductility, limited ductility refers to the structure under the action of earthquake in some not easy to find and not easy to detect is likely to form plastic hinge, in the overall deformation of the structure, part of the component into the nonlinear deformation stages its deformation is larger, and part of the component is still in the elastic deformation stage its deformation is relatively small, the structure on the whole is part of the ductility.…”

“…At the same time, the gap of high pier in mountainous areas is relatively large and is very irregular in structure, so the analysis of seismic response is relatively complex. Bridge is the top priority of lifeline engineering, which plays a key role in earthquake relief, emergency rescue and bridge reconstruction after the earthquake [11,12]. Therefore, the bridge should have its most basic application ability after experiencing earthquake damage.…”