• The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Seismic Performance of Precast Hollow-Core Floors: Part 2—Assessment of Existing Buildings

Author(s): Aishwarya Y. Puranam, Samuel R. Corney, Kenneth J. Elwood, Richard S. Henry, and Des Bull

Publication: Structural Journal

Volume: 118

Issue: 5

Appears on pages(s): 65-77

Keywords: floor diaphragm; hollow-core floors; precast concrete; seismic assessment

Date: 9/1/2021

Past research has indicated that precast concrete hollow-core floors in buildings are susceptible to non-ductile failure modes when subjected to earthquake deformations. While this research has led to the development of more robust connection details suitable for hollow-core floors in new buildings, the existing building stock with hollow-core floors in New Zealand is still at risk and needs to be assessed. Damage to buildings containing hollow-core floors in Wellington, New Zealand, during the 2016 Kaikoura Earthquake prompted the need to better understand the behavior of hollow-core floors and enable those with limited drift capacity to be retrofitted or replaced. Based on tests described in a companion paper, models are developed for three potential failure modes: loss of seating (LoS), positive moment failure (PMF), and negative moment failure (NMF). Implementation of these models in the New Zealand Seismic Assessment Guidelines is discussed. Applying the Guidelines to a database of 112 existing buildings with hollow-core floor units in Wellington indicates that the most likely mode of failure is loss of seating.


Electronic Structural Journal


Please enter this 5 digit unlock code on the web page.