The Seismic Response of a 1:3 Scale Model R.C. Structure with Elastomeric Spring Dampers

Pekcan, Gökhan; Mander, John B.; Chen, Stuart S.

doi:10.1193/1.1585814

Cited by 61 publications

(36 citation statements)

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“…The k 1 , k 2 and F 0 values above also define the non-linear elastic restoring force F e of the spring dampers [6,14]:…”

Section: Design Of Fv Spring Dampers and Steel-teflon Slidersmentioning

confidence: 99%

“…It can be noted that the combination of relations (1)-which defines a rounded rectangular shape of the damping response cycles, resulting from the very low values of the exponent mentioned above-and (2)-featuring a bilinear response of the spring component-produces a typical rounded parallelogram-like shape of the response cycles of this class of FV devices [3,6,14]. As a final design choice, two relatively small-sized spring dampers were selected from the manufacturer's catalogue [16], as they provided the best approximation of the preliminary design k 1 , k 2 and F 0 values.…”

Section: Design Of Fv Spring Dampers and Steel-teflon Slidersmentioning

confidence: 99%

“…The damping coefficient c for each device was determined by the design procedure formulated in [6], assuming a target loss factor = 0.5 for the system (which corresponds to an equivalent viscous damping ratio = 0.25). The resulting value was c = 6.1 kN(s/mm) , which characterizes the analytical expression of the damping restoring force F d [6,14,15]:…”

Section: Design Of Fv Spring Dampers and Steel-teflon Slidersmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation on a base isolation system incorporating steel–Teflon sliders and pressurized fluid viscous spring dampers

Sorace

Terenzi

Magonette

et al. 2007

Earthq Engng Struct Dyn

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SUMMARYAn experimental investigation on a base isolation system incorporating stainless steel-Teflon bearings as sliders, and pressurized fluid viscous spring dampers, is presented in this paper. In the system examined, dampers are connected to the base floor of an isolated building to provide the desired passive control of response in the superstructure, as well as to guarantee that it re-centres completely after the termination of a seismic action. Two types of experiments were conducted: sinusoidal and random cyclic tests, and a pseudodynamic test in 'substructured' configuration. The cyclic tests were aimed at characterizing what follows: the hysteretic and strain-rate-dependent response of the considered highly non-linear spring dampers; the normal pressure-and strain-rate-dependent frictional behaviour of steel-Teflon bearings, manufactured in compliance with the latest standards for this class of sliders; and the combined response of their assembly. The pseudodynamic test simulated the installation of the protection system at the base of a 2:3-scale three-storey steel frame structure, already tested in unprotected conditions by an earlier experimental campaign. Among other findings, the results of the performed tests, as well as of relevant mechanical interpretation and numerical simulation analyses, confirmed the linear additive combination of the dissipative actions of spring dampers and sliders in this mixed installation, and the high protective performance of the considered base isolation/supplemental damping system in a realistic earthquake simulation.

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“…The k 1 , k 2 and F 0 values above also define the non-linear elastic restoring force F e of the spring dampers [6,14]:…”

Section: Design Of Fv Spring Dampers and Steel-teflon Slidersmentioning

confidence: 99%

Section: Design Of Fv Spring Dampers and Steel-teflon Slidersmentioning

confidence: 99%

Section: Design Of Fv Spring Dampers and Steel-teflon Slidersmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation on a base isolation system incorporating steel–Teflon sliders and pressurized fluid viscous spring dampers

Sorace

Terenzi

Magonette

et al. 2007

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…The inherent The total dynamic reaction force exerted by the device is the sum of F d0 (t) damping and F d0 (t) non-linear elastic reaction forces corresponding to their damper and spring functions, respectively. F d0 (t) and F ne (t) can be expressed analytically as follows [6,23]:…”

Section: Characteristics Of Fv Devices Incorporated In the Db Systemmentioning

confidence: 99%

Dissipative Bracing-Based Seismic Retrofit of R/C School Buildings

Sorace¹

2012

TOBCTJ

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A dissipative bracing system incorporating pressurized fluid viscous spring-dampers has been studied for many years by the authors as an alternative seismic protection strategy for new and existing frame structures. As a concluding stage of this activity, a set of demonstrative case studies was examined to illustrate the enhancement of seismic performance and the economic advantages guaranteed by the system in actual design applications. The paper offers a selection of two among these case studies, both concerning retrofit interventions of reinforced concrete school buildings designed with earlier Seismic Standards editions, representative of a large stock of similar edifices built during the 1970s and earlier 1980s. The following aspects are presented and discussed in detail: the mechanical parameters, layouts and locations selected for the constituting elements of the system; the architectural refurbishment projects developed to properly incorporate the structural interventions and improve the appearance of the buildings; highlights of the installation works completed in one of the two case studies; and a synthesis of the performance assessment analyses in original and rehabilitated conditions, developed according to a full non-linear dynamic approach. The results of the analyses show a remarkable enhancement of the seismic response capacities of both structures. This allows reaching the high performance objectives postulated in the retrofit designs, with much lower costs and architectural intrusion as compared to traditional rehabilitation interventions designed for the same objectives.

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“…The inherent re-centering capacity of the devices is ensured by the pressurization of the fluid imposed upon manufacturing by means of a static pre-load force. The F d (t) damping and F ne (t) non-linear elastic reaction forces corresponding to the damper and spring functions of the devices are effectively simulated by the following analytical expressions [17], [23]:…”

Section: Vdb Design Solutionmentioning

confidence: 99%

Viscous Dissipative, Ductility-Based and Elastic Bracing Design Solutions for an Indoor Sports Steel Building

Sorace¹,

Terenzi²,

Bertino³

2012

Volume 8 Number 3

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Three bracing solutions are developed for an indoor sports facility representative of the most recent architectural design trends for recreational and commercial steel buildings. A viscous-dissipative bracing system incorporating pressurized fluid viscous spring-dampers is assumed as anti-seismic technology for the first solution. Thanks to the protective capacities of this technology, non-structural and structural operational performance levels are pursued for the building up to the maximum considered design earthquake level. A traditional concentric X-shaped configuration is selected for the second and third solution, which differ from each other in the design strategy adopted. In the first case, a ductility-based solution is chosen, by adopting a basic behaviour factor equal to 4, reduced by 20% to take into account the structural irregularity caused by the eccentric position of the intermediate floor of the building. In the second case, the same performance objectives as originally formulated for the viscous-dissipative design hypothesis are assumed, fixing the behaviour factor at 1. The resulting dimensions of the members, and the total weight and cost of the steel structure are compared for the three layouts. A substantially higher seismic performance at all normative design levels at a comparable cost; and a cut in the cost by about 50%, with an improved look of the structure due to the remarkably greater slenderness of the constituting members, come out for the viscous-dissipative bracing design as compared to the ductility-based and elastic X-bracing solutions, respectively.Keywords: Steel structures, Seismic protection, Fluid viscous dissipative bracing, Damping, Concentric bracing, Ductility-based design, Elastic design INTRODUCTIONThe most recent trends in the design of steel buildings favour transparency, lightness and aerial effects, which are obtained by including large glazed façades, by increasing the free spans of floors and roofs, and by implementing innovative architectural shapes and finishes. These emerging trends compel structural designers to reduce further the architectural impact of load-bearing systems, while at the same time meeting the high performance levels required by the latest generation of Technical and Seismic Standards on steel construction.A satisfactory balance between the issues of high structural performance and limited architectural impact is a very demanding challenge for structural engineers, especially for buildings situated in medium-to-high seismicity zones. The normative solution to this problem was traditionally represented by the design of dissipative structures, i.e. structures that are able to dissipate energy by means of their ductile hysteretic (plastic) behaviour. According to this ductility-based design approach, the seismic forces for the verifications at the ultimate limit states (i.e. Life Safety -LS and Collapse Prevention -CP performance levels) are computed by scaling relevant pseudo-acceleration response spectra by behaviour factors proport...

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The Seismic Response of a 1:3 Scale Model R.C. Structure with Elastomeric Spring Dampers

Cited by 61 publications

References 0 publications

Experimental investigation on a base isolation system incorporating steel–Teflon sliders and pressurized fluid viscous spring dampers

Experimental investigation on a base isolation system incorporating steel–Teflon sliders and pressurized fluid viscous spring dampers

Dissipative Bracing-Based Seismic Retrofit of R/C School Buildings

Viscous Dissipative, Ductility-Based and Elastic Bracing Design Solutions for an Indoor Sports Steel Building

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