Determination of the exact mode frequencies of multi-storey structures by state-space method and a comparison with mode superposition method

A comparative research has been carried out for obtaining the time-consuming exact solution (state-space) and approximate solution (mode superposition) of transient and steady-state vibrations of linearly damped linear frame buildings. In the mode superposition method, the proportional damping matrix has been constructed by different approaches such as modal combination of mass and stiffness matrixes (Rayleigh) and disregarding the off-diagonal elements of the non-classical damping matrix, while in the state-space method the non-proportional damping matrix is constructed in exact situation. These observations are individually investigated, which the most suitable parameter to render the approximate results as close as possible to the exact results. Harmonic forces are applied on the different storeys of three and five storey frame buildings, and the responses are displayed in comparative tables and figures. The maximum responses are calculated by square root of sum of the squares (SRSS) method. A MATLAB code is generated and the equations of exact and approximate methods are solved

Doğu Anadolu Gözlemevi (DAG) Altyapı ve Üstyapı Çalışmaları

Doğu Anadolu Gözlemevi Projesi kapsamında; DAG yerleşkesi Erzurum - Konaklı - Karakaya Tepeleri'nde (3170 m rakımlı) bugüne kadar yapılan altyapısal ve üstyapısal çalışmaların (yer altı elektrik ve fiber internet hatları, radyolink internet, su deposu, prefabrik hizmet binası, sismik ve jeolojik etüdler, yol, gözlem kulesi gibi) temel ve teknik bilgiler sunulacaktır. Bundan sonra kalan altyapısal çalışmaların da plan ve programları özetlenecektir