Investigarea integrată a performanţelor construcţiilor / Integrated investigation of the performance of buildings [in Romanian]

Claudiu-Sorin Dragomir, Daniela Dobre, Nicolae-Cristian Croicu, Emil-Sever Georgescu

Rezumat/Abstract. In according with seismic design codes in force, the buildings are designed to resist seismic actions under some conditions. Due to the time evolution of these design provisions, there are buildings that were designed decades ago, using less stringent provisions. Thus, when the earthquake is produced, there are many cases where such buildings are badly damaged. To analyze the behaviour of the building after each earthquake, the authorities, owners and professionals take as a reference size the seismic movements of that site. Structural engineering is closely related to parameters such as acceleration, velocity, displacements, and spectral composition, therefore, with the widespread use of strong motions apparata, in the ‘70s they started seismic instrumentation with help of seismic stations located in the buildings, dams and bridges. According to the modern approach of the post-seismic investigation the damage building assessment should be clearlyforeseen and properly planned in order to obtain dynamic parameters for the analysis. The objectives of the paper is the integrated assesment of building performances. All the aforementioned ideas are illustrated through a case study. Specifically, the dynamic parameters evolution of 3D model of reinforced concrete at natural scale will be analyzed.

Cuvinte cheie/Key words: dynamic characteristics, own modes, time-history analysis

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