Abstract
The structural performance evaluation under the monotonic increase of a lateral load due the whole loading process in modern earthquake engineering practice can be performed with the help of different methods and software and can be dramatically represented by «Base reaction – Roof displacement» relationship, which is also known as capacity curve. This kind of relationship is used by nonlinear static Pushover-analysis for seismic performance evaluation of buildings considering any possible damage, which is acceptable by serviceability requirements of a building. However, there are many problems arising due to physically nonlinear analysis of structure, primarily associated with features of the employing finite elements analysis software. Main problems are rather long analysis time among the necessity of high performance computing, or shortcomings of nonlinear analysis methods inherent to the program used. One of the most important shortcomings of structural analysis software is the necessity of single-handed assignment of a failure mechanism for the structure by nonlinear hinges formation zones emplacement to elements of analytical model. This circumstance may lead to results substantially different from reality. These problems can be resolved with the aid of discrete-analytical methods.
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