Experimental and numerical investigations into seismic performance of timber-steel hybrid structure with supplemental dampers

Li, Zheng; Dong, Hanlin; Wang, Xijun; He, Minjuan

doi:10.1016/j.engstruct.2017.08.011

Cited by 36 publications

(15 citation statements)

References 14 publications

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“…This phenomenon has detrimental consequences especially to acceleration-sensitive non-structural components [5], [17]. In recent years, some researchers suggested using new kind of systems to control multi-levels of earthquake energy [6], to achieve stable deformation, increase structural ductility, and increase energy dissipation capacity with different stiffnesses [5], [18], [19] and [20].…”

Section: Introductionmentioning

confidence: 99%

Supplemental Energy Dissipation With Prestressed Lead Extrusion Dampers (P-Led): Experiments and Modeling

Pettorruso¹,

Bruschi²,

Quaglini³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Supplemental energy dissipation devices are employed both in new and retrofitted constructions in order to prevent structural damage, increase life-safety and achieve a desired level of performance. Among these devices, hysteretic dampers have been proven to be an appropriate and economically affordable solution to reduce the vulnerability of ordinary structures, such as residential, school and industrial buildings. The study presents an experimental and numerical investigation of a Prestressed Lead Extrusion Damper (P-LED), an emerging energy dissipation device which provides energy dissipation by means of the plastic extrusion of lead through an orifice created between a containing tube and a moving shaft and achieves high specific output force by preloading of the working material. The experimental investigation is performed following the provisions set in the European standard EN 15129 for Displacement Dependent Devices. A damper prototype is tested in cyclic tests at different displacement amplitudes and in a monotonic ramp up to the amplified design deformation. The damper shows a rigid-plastic behavior, without strength degradation regardless of the imposed deflection; the shape of the hysteresis loops is essentially rectangular, resulting in an effective damping of 0.55, very close to the maximum theoretical level; the device is able to sustain multiple cycles of motion at the basic design earthquake displacement, anticipating a maintenance-free operation even in presence of repeated ground shakes. A 3D finite element model of the P-LED is formulated in Abaqus and validated upon the results of the experimental tests. The model enlightens that the output force of the damper accounts for two contributions, namely the extrusion force of the lead and the friction force between the lead and the moving shaft. The model is then used in a parametric study to investigate the influence of the device dimensions, namely the diameters of the shaft, of the containing tube and of the bulge, and the length of the shaft, on the output force. The numerical data points are fitted by a simple model which can be used for design of the damper to a specific quasi-static force.

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Section: Introductionmentioning

confidence: 99%

Supplemental Energy Dissipation With Prestressed Lead Extrusion Dampers (P-Led): Experiments and Modeling

Pettorruso¹,

Bruschi²,

Quaglini³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…This offers the possibility of fully harnessing the dissipative potential of seismic dampers. In this context, energy dampers have been tested on wood-frame shear walls under different configurations (Ugalde et al 2019): Filiatrault (1990) and Li et al (2017) tested walls with frictional dissipators, Dinehart et al (1999) tested walls with viscoelastic dissipators, Higgins (2001) tested yield dissipators, and Symans et al (2002a) and Dutil and Symans (2004) investigated viscous fluid dampers using typical diagonal and chevron configurations, as shown in Figure 1. However, all previous applications of energy dissipators in wood-frame shear walls are based on the straight transmission of displacements from the wall to the dissipator.…”

Section: Brief Literature Review Of Seismic Protection Systems With Ementioning

confidence: 99%

Development of an amplified added stiffening and damping system for wood-frame shear walls.

Montano

Maury

Almazán

et al. 2020

Lat. Am. j. solids struct.

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The effectiveness of seismic dampers to improve the lateral performance of timber structures may be heavily diminished if restrictive lateral drift limits as set by building codes, governs the design of the structure. This paper presents an innovative approach to improve the performance of seismic dampers installed in stiff wood-frame shear walls. U-Shape Flexural Plate dampers with a novel internal restraint system, were installed in a 4880x2475 mm wood-frame shear wall with an Eccentric Lever-Arm System which aimed at amplifying the displacements by transferring them from the shear wall to the dampers. Cyclic tests were conducted to four specimens. Initial test results showed that the presented amplifying system suffered concentrated losses of stiffness at some connections joints reducing its real efficiency. The loss of displacement transmission to dampers was retrofitted, and the results showed a great benefit in terms of resilience for the damped shear wall in contrast with unprotected ones. It was found that this approach provides a feasible solution to enhance the lateral performance of wood-frame structures.

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“…The models served as a robust tool for evaluating the seismic performance of such hybrid structures (Li et al 2014(Li et al , 2015(Li et al , 2018a. Besides, further research efforts have been made in the field of steel-to-wood connections, in order to facilitate the on-site fabrication, increase the energy dissipation capacity and provide self-centering capability for such hybrid structures (Li et al 2017(Li et al , 2019(Li et al , 2020b.…”

Section: Introductionmentioning

confidence: 99%

Structural Damage Evaluation of Multistory Timber–Steel Hybrid Structures through Shake Table Tests

Wang

et al. 2021

J. Perform. Constr. Facil.

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Timber-based hybrid structures provide a prospective solution for utilizing environmentally friendly timber material in the construction of mid-rise or high-rise structures. This study mainly focuses on structural damage evaluation for a type of timber-steel hybrid structures, which incorporate prefabricated light wood frame shear walls into steel moment-resisting frames (SMRFs). The structural damage of such a hybrid structure was evaluated through shake table tests on a four-story large-scale timber-steel hybrid structure. Four ground motion records (i.e., Wenchuan earthquake, Canterbury earthquake, El-Centro earthquake, and Kobe earthquake) were chosen for the tests, with the consideration of three different probability levels (i.e., minor, moderate and major earthquakes) for each record. During the shake table tests, the hybrid structure performed quite well with visual damage only to wood shear walls.No visual damage in SMRF and the frame-to-wall connections was observed. The correlation

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Experimental and numerical investigations into seismic performance of timber-steel hybrid structure with supplemental dampers

Cited by 36 publications

References 14 publications

Supplemental Energy Dissipation With Prestressed Lead Extrusion Dampers (P-Led): Experiments and Modeling

Supplemental Energy Dissipation With Prestressed Lead Extrusion Dampers (P-Led): Experiments and Modeling

Development of an amplified added stiffening and damping system for wood-frame shear walls.

Structural Damage Evaluation of Multistory Timber–Steel Hybrid Structures through Shake Table Tests

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