Confirmation of Detailed Evaluation Results by Equivalent Elastic Perfectly Plastic Capacity Curve

To conduct seismic evaluation of buildings, engineers may use preliminary assessment method or detailed evaluation method. Engineers usually use auxiliary program and structural analysis software to carry out detailed evaluation. Methods and software become more and more accurate and user friendly. However, engineers still need to make sure whether the result is correct to avoid any mistakes while building structure model or setting model information. The article is to transform the capacity curve into bilinear one, and normalizes each step of pushover analysis by the yielding point of bilinear curve. Relation of equivalent base shear, equivalent period, damping ratio, correction factor of damping ratio, demand of spectrum acceleration, and capacity of spectrum acceleration to ductility can also be normalized for the idealized bilinear curve. The article first uses linear-elastic-perfect-plastic curve to evaluate ideal solutions, and uses two building cases to compare the results of detailed evaluation with ideal solutions. The comparison of building cases and ideal solutions shows that the values of ideal solution can be used to compare with real structural buildings to confirm the results of detailed evaluation. © 2022, Chinese Institute of Civil and Hydraulic Engineering. All right reserved.