Equivalent force control method for substructure pseudo‐dynamic test of a full‐scale masonry structure

Zaixian, Chen; Xu, Guoshan; Wu, Bin; Sun, Yongtao; Huan-ding, Wang; Wang, Fenglai

doi:10.1002/eqe.2382

Cited by 9 publications

(16 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the implicit algorithms generally require iteration, which can result in inconsistent HS test results. To avoid iteration, an equivalent force control (EFC) method [39], which uses feedback control to replace numerical iteration for the real-time HS testing, was proposed. EFC method was used to a full-scale six-story frame-supported reinforced concrete masonry shear wall [39].…”

Section: Equivalent Force Control Methodsmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2018

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Equivalent Force Control Methodsmentioning

confidence: 99%

“…This paper uses a PD controller as the equivalent force controller. The parameters of the PD controller are obtained as discussed in Reference [39].…”

Section: Equivalent Force Control Methodsmentioning

confidence: 99%

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

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, Wu et al pointed out that a PI EF controller can compensate for the steady‐state error and then the feedforward gain K F is not necessary. Lately, to avoid response overshooting and/or oscillation, Chen et al provided analytical expressions for suitable PI parameter ranges. Very recently, Wu et al resorted to employing a robust nonlinear sliding mode control in conjunction with the EFC method.…”

Section: The α‐Methods and The Efc Methodsmentioning

confidence: 99%

“…The EFC method is a versatile substructure testing algorithm due to its possible applications to standard PDT, RST, and even effective force testing . Up to now, in order to verify the method and/or evaluate structural dynamic responses, many analyses and experiments have been carried out, including (a) the RST on a single‐DoF (SDoF) system with a spring specimen; (b) the RST on an offshore platform with a magnetorheological damper specimen; (c) the PDT on both SDoF and MDoF structures endowed with a buckling‐restrained brace specimen; and (d) the substructuring PDT of a full‐scale masonry structure . Besides, the proportional‐derivative control, the proportional‐integral (PI) control, and sliding mode control methods have been employed in the EFC method .…”

Section: Introductionmentioning

confidence: 99%

An improved equivalent force control algorithm for hybrid seismic testing of nonlinear systems

Wang

et al. 2017

Struct Control Health Monit

Self Cite

View full text Add to dashboard Cite

Summary The equivalent force control (EFC) algorithm is a hybrid seismic testing method based on both an implicit integration algorithm and force feedback control. As it performs the computation of the numerical substructure with a fixed sampling number and some evaluations are not necessary, the EFC method is believed to be time‐consuming for seismic testing of nonlinear systems with complicated numerical substructure model. In order to tackle this problem, the EFC method with varying sampling number (vEFC) has been conceived. The analysis of the vEFC method has shown that 2 traditional pseudodynamic testing (PDT) variants on the basis of implicit time integration schemes and numerical iteration, that is, the IPDT1 method and the IPDT2 method, can be recovered from the vEFC method. Moreover, the advantages of the vEFC method, such as fast response rate and compensation for control errors and possible slippage, are demonstrated.

show abstract

“…The integration algorithm is the key element of the PDT, PDST, and real‐time substructure testing (RST), which is a new testing methodology. There are several new variants that have been investigated and applied in recent years . The operator‐splitting method for RST and the equivalent force control method for PDT and RST were investigated by Wu et al and Chen et al Chang presented the improved explicit Chang method for structural dynamics and Bursi et al investigated novel coupling Rosenbrock‐based algorithms for real‐time dynamic substructure testing.…”

Section: Introductionmentioning

confidence: 99%

Pseudodynamic tests with substructuring of a full‐scale precast box‐modularized structure made of reinforced concrete shear walls

Wang

et al. 2017

Structural Design Tall Build

Self Cite

View full text Add to dashboard Cite

SummaryA novel horizontal and vertical wall-to-wall and wall-to-floor connection methods for precast box-modularized structure with reinforced concrete shear walls (PBSRCSWs) are proposed in this paper. The entailing behavior of the proposed connections and the seismic performance of one full-scale six-story PBSRCSWs were experimentally studied by means of pseudodynamic substructure tests. In order to improve the relevant experimental accuracy, we presented and validated one versatile testing platform Hytest, combined with external displacement feedback control (EDFC; Hytest with EDFC). In greater detail, it was shown from the pseudodynamic substructure test results that the proposed Hytest with EDFC can effectively impose the desired displacements on the specimens rather than on the actuators. Moreover, both the horizontal and vertical wall-to-wall connections proposed for the PBSRCSWs exhibited a favorable behavior whilst the PBSRCSWs subjected to earthquake records showed an excellent seismic performance. KEYWORDSconcrete connection, external displacement feedback control, precast box-modularized structure, pseudodynamic substructure test, reinforced concrete shear wall, seismic performance

show abstract

Equivalent force control method for substructure pseudo‐dynamic test of a full‐scale masonry structure

Cited by 9 publications

References 23 publications

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

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

An improved equivalent force control algorithm for hybrid seismic testing of nonlinear systems

Pseudodynamic tests with substructuring of a full‐scale precast box‐modularized structure made of reinforced concrete shear walls

Contact Info

Product

Resources

About