A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic accelerations in architectural precast concrete cladding
Highlights The values of the seismic coefficient Cp meet the performance requirements. For design earthquakes the code overestimates the structure amplification factor. For design earthquakes the code underestimates the component amplification factor. The satisfactory prediction of Cp is due to the combination of opposite errors.
Abstract Architectural precast concrete (APC) cladding is a type of building facade broadly used worldwide. It is composed of an array of concrete panels attached to the building structural system with steel connections. During earthquakes, the APC system can be damaged both by excessive drifts and accelerations. While research on drift-compatibility has been performed in recent years, to the author’s knowledge there are limited studies aimed to determining the level of seismic forces in APC cladding panels and connections. However, these forces could be larger than anticipated since this system has low natural frequencies due to its large mass and low stiffness in the out-of-plane direction. This paper presents an experimental and numerical study of the seismic accelerations developed in APC cladding panels installed on a building. The design limits provided by the code for ductile and brittle elements of the cladding system indicate that the code is able to meet the desired performance criteria both in case of service and design level motions. However, the satisfactory results obtained for design level earthquakes are due to the combination of significant errors in the prediction of the component and structure amplification factors.
Seismic accelerations in architectural precast concrete cladding
Highlights The values of the seismic coefficient Cp meet the performance requirements. For design earthquakes the code overestimates the structure amplification factor. For design earthquakes the code underestimates the component amplification factor. The satisfactory prediction of Cp is due to the combination of opposite errors.
Abstract Architectural precast concrete (APC) cladding is a type of building facade broadly used worldwide. It is composed of an array of concrete panels attached to the building structural system with steel connections. During earthquakes, the APC system can be damaged both by excessive drifts and accelerations. While research on drift-compatibility has been performed in recent years, to the author’s knowledge there are limited studies aimed to determining the level of seismic forces in APC cladding panels and connections. However, these forces could be larger than anticipated since this system has low natural frequencies due to its large mass and low stiffness in the out-of-plane direction. This paper presents an experimental and numerical study of the seismic accelerations developed in APC cladding panels installed on a building. The design limits provided by the code for ductile and brittle elements of the cladding system indicate that the code is able to meet the desired performance criteria both in case of service and design level motions. However, the satisfactory results obtained for design level earthquakes are due to the combination of significant errors in the prediction of the component and structure amplification factors.
Seismic accelerations in architectural precast concrete cladding
Pantoli, Elide (author) / Hutchinson, Tara (author)
Engineering Structures ; 180 ; 742-749
2018-11-26
8 pages
Article (Journal)
Electronic Resource
English
APC , architectural precast concrete , BNCS , Building Nonstructural Components and Systems , UCSD , University of California, San Diego , FB , fixed base , PIDR , peak interstory drift ratio , PFA , peak floor acceleration , SDOF , single degree of freedom , PEER , pacific earthquake engineering research center , Precast concrete cladding , Cladding connections , Architectural concrete , Seismic accelerations , Seismic forces , Component amplification factor , Structure amplification factor
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