دانلود رایگان مقاله انگلیسی آنالیز زمانی واکنش دینامیکی ساختمان تحت عمل لرزه ای - 2017

Abstract.

The second part of the article illustrates the use of the time analysis method (TAM) by the example of the calculation of a 3-storey building, the design dynamic model (DDM) of which is adopted in the form of a flat vertical cantilever rod with 3 horizontal degrees of freedom associated with floor and coverage levels. The parameters of natural oscillations (frequencies and modes) and the results of the calculation of the elastic forced oscillations of the building's DDM – oscillograms of the reaction parameters on the time interval t  [0; 131,25] sec. The obtained results are analyzed on the basis of the computed values of the discrepancy of the DDS motion equation and the comparison of the results calculated on the basis of the numerical approach (FEM) and the normative method set out in SP 14.13330.2014 "Construction in Seismic Regions". The data of the analysis testify to the accuracy of the construction of the computational model as well as the high accuracy of the results obtained. In conclusion, it is revealed that the use of the TAM will improve the strength of buildings and structures subject to seismic influences when designing them.

3. Сonclusions

1. In closed form, the expressions for the kinematic and force reactions of the discrete model of the system with elastic oscillations caused by the action of seismic forces are given. 2. The time analysis of the elastic response of a discrete model of a 3-storey building is simulated by a cantilever rod with 3 degrees of freedom during an earthquake specified by the corresponding accelerogram. 3. The efficiency of the TAM of the response of the DDS in solving a similar class of problems is shown, which makes it possible to use it in the design of buildings and structures in order to improve their strength reliability.