Fischinger, Matej

Second Line Back-Up Systems for the Seismic Protection of Cladding Panels in RC Precast Industrial Buildings

Abstract eng:
Recent Italian earthquakes in L'Aquila (2009) and Emilia-Romagna (2012) revealed an inadequate seismic performance of many cladding panels in precast industrial buildings. Since the existing cladding-to-structure connections in several cases obviously do not possess adequate displacement and strength capacity to resist seismic loading, an improvement of the existing and a development of innovative systems is necessary. Important steps toward the achievement of this goal have already been performed in the frame of the European FP7 project SAFECLADDING - Improved Fastening Systems of Cladding Panels for Precast Buildings in Seismic Zones [1]. Still additional research and development is needed to bring the new devices up to a level, when they could be used in practice. Currently it is thus essential to find a simple and economically attractive back-up (retrofit) solution, which could be used in the existing structures as well as in new structures, where the traditional cladding connections still will be used. In the paper a newly developed restrainer system, designed to prevent a collapse of cladding panels upon the failure of existing connections is presented. The restrainer system has been developed at the University of Ljubljana, Faculty of Civil and Geodetic Engineering in the frame of the recently concluded SAFECLADDING project. Such system consists of restrainers (steel or synthetic ropes) and anchoring elements which are used to attach the rope to the structural elements and cladding panels. The strength and deformation capacity of the new restrainer system has been estimated by means of the set of static and dynamic experiments. The seismic demand has been estimated using closed-form expressions, which has been derived taking into account the main properties of their response. Finally, the proposed formulas have been evaluated based on the extensive numerical parametric study, where the structures were analyzed by means of the response history analysis.

Contributors:

Zoubek, Blaz

Conference Title:

Proceedings of the 16th World Conference on Earthquake Engineering

Conference Title:

16th World Conference on Earthquake Engineering

Conference Venue:

Santiago (CL)

Conference Dates:

2017-01-09 / 2017-01-13

Rights:

Text je chráněný podle autorského zákona č. 121/2000 Sb.