Rate Dependence in High-Performance Fiber-Reinforced Cement-Based Composites for Seismic Applications

Title: Rate Dependence in High-Performance Fiber-Reinforced Cement-Based Composites for Seismic Applications
Author(s): Kyle S. Douglas, Sarah L. Billington
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 17 - 25
Total Pages: 9
Nb references: 8
Language: English

Abstract: Experimental work is being conducted to examine the effect of strain rate on the properties of high-performance fiber-reinforced cement-based composites (HPFRCC). In this paper, preliminary results for a particular type of HPFRCC, Engineered Cementitious Composites (ECC) will be presented. This material is intended to be used in a proposed retrofit system for steel frame buildings, specifically critical facilities, in seismic zones. It is desired to determine how the advantageous properties of ECC, namely strain hardening and multiple cracking, are affected by elevated strain rates.
Cylindrical specimens of ECC were subjected to monotonic compression, monotonic tension, and reversed-cyclic tension and compression at varying strain rates. The faster strain rates were intended to simulate rates that ECC elements in a structure might be subjected to during an earthquake. Preliminary analyses of the experimental results show that seismic strain rates do affect the strength and ductility of ECC. While tensile strength increases with strain rate, the ductility decreases. The monotonic tension and compression response provides an envelope for the cyclic behavior of ECC in general, but not at all strain rates. At the fastest seismic rate considered in this work, cyclic specimens had considerably less tensile capacity after first cracking than the monotonic tension specimens.

Online publication: 2005-05-15
Classification: Standards for Materials and Testing
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.003