High Displacement Glass Seismic Systems

Gowda, B. H. Lakshmana; Heydari, Nader

doi:10.1061/(asce)sc.1943-5576.0000046

Cited by 8 publications

(4 citation statements)

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“…The most significant examples are summarized in Table 2 (h = 0.02 m). In the same table, a series of fundamental periods T* = 2π/ω are also proposed for the curtain wall equipped by devices, with ω given by Equation (4). These values are compared with numerical periods T M03 1 obtained by a series of modal analyses performed in ABAQUS on the equipped curtain walls (M03 FE-model).…”

Section: Curtain Wall With Viscoelastic Brackets (M03 Fe-model)mentioning

confidence: 99%

“…Recently, numerous authors investigated the dynamic response of different glazing systems. Various typologies of façade were studied under specific loading conditions [3][4][5] and particular attention was dedicated to the blast-resistance of glass curtain walls [6][7][8][9][10]. In [11,12], the effects of special dissipative devices on the behavioral trends of a cable-supported façade subjected to air blast loads have been recently discussed.…”

Section: Introductionmentioning

confidence: 99%

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Blast Analysis of Laminated Glass Curtain Walls Equipped by Viscoelastic Dissipative Devices

Amadio

Bedon

2012

Buildings

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Nonlinear numerical simulations are reported for a conventional unitized laminated glass curtain wall subjected to high- and low-level air blast loading. The studied curtain wall, spanning floor to floor, consisted of a laminated glass panel, a continuous bead of structural silicone sealant, a split screw spline frame and four rigid brackets. Firstly, a linear elastic FE-model (M01) is presented to investigate dynamic stresses and deflections due to explosion, by taking into account geometrical nonlinearities. Since, in similar glazing systems, it is important to take into account the possible cracking of glass lites, a second model (M02), calibrated to previous experimental data, is proposed. In it, glass behaves as a brittle-elastic material, whereas an elastoplastic characteristic curve is assumed for mullions. As a result, the design explosion seriously affects the main components of the curtain wall, especially the bead of silicone. To address these criticalities, additional viscoelastic (VE) devices are installed at the frame corners (M03). Their effectiveness explains the additional deformability provided to the conventional curtain wall, as well as the obvious dissipation of the incoming energy due to blast loading. Structural and energy capabilities provided by devices are highlighted by means of numerical simulations

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Section: Curtain Wall With Viscoelastic Brackets (M03 Fe-model)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Blast Analysis of Laminated Glass Curtain Walls Equipped by Viscoelastic Dissipative Devices

Amadio

Bedon

2012

Buildings

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“…It has been reported that for in-plane loads on glass panels, increasing the clearance between bolt to glass hole and the distance between hole and panel edge, enhanced the stress development on the glass panels [30]. In order to improve the behaviour of PFGFS in areas of high seismicity, the seismic performance of specially design spider arm systems connecting the glass to structural support frames was assessed [31]- [32], including large horizontally slotted holes allowing isolated horizontal translation (figure 10), for that purpose, special low modulus silicon sealant was used to allow rigid body translation during the racking actions. The sizes of the slotted holes need to be calculated according to the glass façade drift demands from the building.…”

Section: Support Structurementioning

confidence: 99%

Seismic Behaviour of Point Fixed Glass Façade Systems: State of the Art Review

Inca¹

2019

EJEST

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flat glass has been used for many centuries in wall openings and windows. It allows light in and broadens the visual horizon, while protecting from the environmental elements. It also features a good potential for energy savings during the lifetime of the building. The technological developments it benefited from, in the last decades, transformed common plate glass into a stronger material, with safer and more predictable failure and some degree of post breakage capacity; even pseudo-ductility. For this reason, at present day, glass is a structural material with established credits. This allows for new buildings with dematerialized contours: the glass skin buildings; which are taking over the set in modern cities. There are several types of glass façade buildings, depending on the system used to fix the glass to the main structure. Point Fixed Glass Façade Systems (PFGFS) feature an advantage in terms of architectural expression allowing for greater transparency, since no mullions and frames are required for additional support, only discrete point fixing. The design codes for structural glass are still under development, and one of the aspect that needs further attention is the behaviour of PFGFS when subjected to seismic action. This aspect is of the essence in the sense that forensic analysis to past earthquake events showed that important damage has been observed to GFS due to the in-plane racking actions. This may have severe costs in terms of human losses and in terms of economic costs (repair and downtime). The present paper addresses this theme by presenting an overview of its key aspects, review of past research, both analytical and experiment for PFGFS under seismic loads, design code provisions for different countries as well as recommendations for prediction of racking capacity of Point Fixed Glass Façade Systems.

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“…Despite the growing popularity of PFGF systems, there is very limited published research on their behaviour under the in-plane racking performance which is expected to be very different from FGF system published results. Recently, a PFGF system with large horizontal slotted holes in the support arms was designed and constructed in California, and the performance was verified by mock-up tests (Gowda and Heydari, 2009). In this article, a unique full-scale in-plane racking laboratory test of PFGF system is described which utilised contemporary connections to attach the glass panels to the structural support frame consists of spider arms and special bolt fittings.…”

Section: Introductionmentioning

confidence: 99%

Analytical study of point fixed glass façade systems under monotonic in-plane loading

Sivanerupan

Wilson

Gad

et al. 2016

Advances in Structural Engineering

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The point fixed glass façade system is popular and considered a more elegant façade option compared to the framed glass façade system mainly for storefront, walkways and lobby areas in buildings. Point fixed glass façade system is fixed to the support structure using special bolt fittings and structural spider arms. Generally, the racking performance of these systems is not considered at the design stage in low to moderate seismic region and the system may be vulnerable if there is insufficient in-plane drift capacity compared with the demand imposed during earthquakes and wind actions. A unique full-scale in-plane racking laboratory test on a typical point fixed glass façade system was conducted and a maximum drift of 2.1% was measured before catastrophic failure. Non-linear finite element models were then developed and benchmarked against experimental results. The experimental results and finite element analyses indicated that a significant amount of the drift capacity was attributed to the rigid body translation in the façade system connections at the built-in oversize holes provided for construction tolerances. In this article, the laboratory test setup and the experimental results are summarised, and the finite element modelling methodology and non-linear analysis approach undertaken using ANSYS for the experimental test are discussed along with number of parametric studies.

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High Displacement Glass Seismic Systems

Cited by 8 publications

References 0 publications

Blast Analysis of Laminated Glass Curtain Walls Equipped by Viscoelastic Dissipative Devices

Blast Analysis of Laminated Glass Curtain Walls Equipped by Viscoelastic Dissipative Devices

Seismic Behaviour of Point Fixed Glass Façade Systems: State of the Art Review

Analytical study of point fixed glass façade systems under monotonic in-plane loading

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