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Seismic Coefficients and Earthquake Damage Predictions for a Space Truss with a Supporting Structure
Zailin Yang,Ziwen Wang,Yang Yong,Menghan Sun 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.4
Previous studies have shown that when the lower support structure is considered, the dynamic characteristics of grid structures change signifi cantly, and the stress distributions are also noticeably diff erent. Therefore, this paper discusses whether other simple and feasible structural seismic damage prediction methods could be proposed after accounting for the infl uence of the lower supporting structure. Considering diff erent site types and diff erent intensities, a time-history analysis was conducted using the mode decomposition response spectrum method for frequent 8- and 9-degree earthquake intensity. Then, the acceleration response spectra for diff erent sites experiencing 8- and 9-degree intensity of frequently occurring earthquakes specifi ed in the Code for Seismic Design of Buildings (GB50011-2010) were used to calculate and discuss the distribution law for the seismic internal forces of space truss structures. Based on the calculation conclusion, the design method and damage prediction method for a plate-like space truss structure under earthquake actions are discussed. Then, a new value of the seismic action coeffi cient was proposed in this paper, and the ground motion peaks for various types of earthquake damage for diff erent site types were obtained using the functional relationship.
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