Substructure Hybrid Simulation Boundary Technique Based on Beam/Column Inflection Points

Zaixian Chen, Xueyuan Yan, Hao Wang, Xingji Zhu and Billie F. Spencer
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Zaixian Chen: Department of Civil Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
Xueyuan Yan: College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
Hao Wang: Department of Civil Engineering, Southeast University, Nanjing 210096, China
Xingji Zhu: Department of Civil Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
Billie F. Spencer: Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

Sustainability, 2018, vol. 10, issue 8, 1-20

Abstract: Compatibility among substructures is an issue for hybrid simulation. Traditionally, the structure model is regarded as the idealized shear model. The equilibrium and compatibility of the axial and rotational direction at the substructure boundary are neglected. To improve the traditional boundary technique, this paper presents a novel substructure hybrid simulation boundary technique based on beam/column inflection points, which can effectively avoid the complex operation for realizing the bending moment at the boundary by using the features of the inflection point where the bending moment need not be simulated in the physical substructure. An axial displacement prediction technique and the equivalent force control method are used to realize the proposed method. The numerical simulation test scheme for the different boundary techniques was designed to consider three factors: (i) the different structural layers; (ii) the line stiffness ratio of the beam to column; and (iii) the peak acceleration. The simulation results for a variety of numerical tests show that the proposed technique shows better performance than the traditional technique, demonstrating its potential in improving HS test accuracy. Finally, the accuracy and feasibility of the proposed boundary technique is verified experimentally through the substructure hybrid simulation tests of a six-story steel frame model.

Keywords: substructure; boundary technique; inflection point; hybrid simulation; force-displacement control (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
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