Seismic cracking analyses of two types of face slab for concrete-faced rockfill dams
| Autor: | Degao Zou, Xianjing Kong, Yongqian Qu, Yu Zhang, Xiang Yu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Cement
business.industry Composite number 0211 other engineering and technologies General Engineering 020101 civil engineering 02 engineering and technology Structural engineering Plasticity 0201 civil engineering Substrate (building) Cracking Face (geometry) Slab General Materials Science Geotechnical engineering Composite slab business Geology 021101 geological & geomatics engineering |
| Zdroj: | Science China Technological Sciences. 60:510-522 |
| ISSN: | 1869-1900 1674-7321 |
| DOI: | 10.1007/s11431-016-0363-6 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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