GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall

The case study presented is a 195 meters tall office tower with a raised podium made of full height glass panels, up to 15 meters high. The panels are only restrained by prestressed high-strength stainless-steel rods, lying entirely in the glass panel build-up, composed by four 12 mm thick plies, l...

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Autor principal:	Giovanni De Mari
Formato:	article
Lenguaje:	EN
Publicado:	Challenging Glass Conference 2020
Materias:	glass structural glass glass engineering case study finite element analysis pre-tensioned structure Clay industries. Ceramics. Glass TP785-869
Acceso en línea:	https://doaj.org/article/b001ac97f7a0408c94852bb7ce607643
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spelling	oai:doaj.org-article:b001ac97f7a0408c94852bb7ce6076432021-12-05T05:13:07ZGS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall2589-8019https://doaj.org/article/b001ac97f7a0408c94852bb7ce6076432020-09-01T00:00:00Zhttps://proceedings.challengingglass.com/index.php/cgc/article/view/291https://doaj.org/toc/2589-8019 The case study presented is a 195 meters tall office tower with a raised podium made of full height glass panels, up to 15 meters high. The panels are only restrained by prestressed high-strength stainless-steel rods, lying entirely in the glass panel build-up, composed by four 12 mm thick plies, laminated with 1.52 mm thick sheets of ionoplast interlayer, with an overall thickness of approx. 52 mm. Due to the facade geometry and the high wind expected, movement joints between rods are introduced, allowing for differential movements to avoid peak stresses in the glass panels. Also, smooth transition between rod rectangular section at the interface with the glass panels to circular section at anchor points need to be ensured by CNC machining to avoid failure of the rod anchors due to fatigue. Sophisticated non-linear 3D FEM models had to be analyzed to predict glass stresses, differential movements to be accommodated by the joints and geometrical transition between rod sections. The main innovation of this facade was the use of prestressed rods in conjunction with jumbo size glass panels. As tension structures experience large movements, it was crucial to understand the effect of these deformations imposed by the rods onto the full height glass panels, analyzing steel and glass members together as a single facade entity. Furthermore, in contrast to typical cable wall facade where the prestressed elements (cables) are offset from the glass line, here the rods are located in the plane of the glass panels and completely flush with them, ensuring the thinnest possible build-up in relation to the large facade span. A rocking portal frame, moving together with the rods to avoid excessive warping in the glass panels, has been used as a solution to deal with the required opening in the facade. An additional complication was given by the high wind load (typhoon) applied on the facade which required rods’ prestress in the order of 1000 Kilonewton in order to limit glass stresses and deflections. Giovanni De MariChallenging Glass Conferencearticleglassstructural glassglass engineeringcase studyfinite element analysispre-tensioned structureClay industries. Ceramics. GlassTP785-869ENChallenging Glass Conference Proceedings, Vol 7, Iss 1 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	glass structural glass glass engineering case study finite element analysis pre-tensioned structure Clay industries. Ceramics. Glass TP785-869
spellingShingle	glass structural glass glass engineering case study finite element analysis pre-tensioned structure Clay industries. Ceramics. Glass TP785-869 Giovanni De Mari GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall
description	The case study presented is a 195 meters tall office tower with a raised podium made of full height glass panels, up to 15 meters high. The panels are only restrained by prestressed high-strength stainless-steel rods, lying entirely in the glass panel build-up, composed by four 12 mm thick plies, laminated with 1.52 mm thick sheets of ionoplast interlayer, with an overall thickness of approx. 52 mm. Due to the facade geometry and the high wind expected, movement joints between rods are introduced, allowing for differential movements to avoid peak stresses in the glass panels. Also, smooth transition between rod rectangular section at the interface with the glass panels to circular section at anchor points need to be ensured by CNC machining to avoid failure of the rod anchors due to fatigue. Sophisticated non-linear 3D FEM models had to be analyzed to predict glass stresses, differential movements to be accommodated by the joints and geometrical transition between rod sections. The main innovation of this facade was the use of prestressed rods in conjunction with jumbo size glass panels. As tension structures experience large movements, it was crucial to understand the effect of these deformations imposed by the rods onto the full height glass panels, analyzing steel and glass members together as a single facade entity. Furthermore, in contrast to typical cable wall facade where the prestressed elements (cables) are offset from the glass line, here the rods are located in the plane of the glass panels and completely flush with them, ensuring the thinnest possible build-up in relation to the large facade span. A rocking portal frame, moving together with the rods to avoid excessive warping in the glass panels, has been used as a solution to deal with the required opening in the facade. An additional complication was given by the high wind load (typhoon) applied on the facade which required rods’ prestress in the order of 1000 Kilonewton in order to limit glass stresses and deflections.
format	article
author	Giovanni De Mari
author_facet	Giovanni De Mari
author_sort	Giovanni De Mari
title	GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall
title_short	GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall
title_full	GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall
title_fullStr	GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall
title_full_unstemmed	GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall
title_sort	gs&e journal > large deflection glass facade in typhoon area: taikoo place 2 podium wall
publisher	Challenging Glass Conference
publishDate	2020
url	https://doaj.org/article/b001ac97f7a0408c94852bb7ce607643
work_keys_str_mv	AT giovannidemari gsejournallargedeflectionglassfacadeintyphoonareataikooplace2podiumwall
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GS&E journal > Large Deflection Glass Facade in Typhoon Area: Taikoo Place 2 Podium Wall

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