Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-04-01

Journal: SCIENCE CHINA-TECHNOLOGICAL SCIENCES

Included Journals: Scopus、CSCD、EI、SCIE

Volume: 60

Issue: 4

Page Number: 510-522

ISSN: 1674-7321

Key Words: CFRD; face slab; seismic cracking failure; DFRCC

Abstract: Estimating the cracking capacity of the face slab and recommending effective crack-control measures are important for the anti-seismic safety of concrete-faced rockfill dams (CFRDs). In this paper, two-dimensional analyses of CFRDs are performed to simulate the seismic cracking behavior of conventional reinforced concrete (RC) face slab and a type of composite face slab. The composite face slab is composed of a ductile fiber-reinforced cement-based composite (DFRCC) layer and an RC substrate. For this purpose, a co-axial rotating smeared crack model for concrete and DFRCC is coupled with the generalized plasticity model for the rockfill material, and then implemented in a finite element program. The results show that during strong earthquakes, an RC slab is more likely to develop a penetrating macro-crack in its thickness dimension. In contrast, the crack-controlling composite slab demonstrates excellent resistance to seismic cracking, and no penetrating macro-cracks are observed. Major harmful cracks that form in the concrete substrate are stopped by the DFRCC layer in composite slabs.