In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir filling

doi:10.1007/s11709-016-0378-2

Front. Struct. Civ. Eng.

2018, Vol. 12

Issue (1) : 81-91 https://doi.org/10.1007/s11709-016-0378-2

RESEARCH ARTICLE

In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir filling

Neftalí SARMIENTO-SOLANO(

), Miguel P. ROMO

1Institute of Engineering, National University of Mexico, Mexico City, 04510, Mexico

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Abstract

To evaluate the effects of dam height, valley narrowness and width of concrete slabs on the first-dam reservoir filling in-plane transversal normal stresses in the concrete face of CFRD´s, 3D finite difference analyses were carried out. Behavior of rockfill dams considered in this study was defined from the monitoring of a number of 3D sets of pressure cells and extensometers installed in three large dams in Mexico. The 3D analyses results show that high in-plane transversal compressive stresses develop within the concrete panels located in the central concrete face zone upon dam reservoir filling loading. Likewise, in-plane induced tensile transversal stresses in the zones near the abutments increase the potential of slabs cracking and damaging the waterstops in-between the vertical and perimetral joints. From the results of the 3D finite difference analyses, a simple method to estimate in-plane normal stresses in the concrete face is advanced and through comparisons with the results of a 3D case numerical study, its accuracy assessed.

Keywords concrete face CFR dams reservoir filling slab in-plane stresses

Corresponding Author(s): Neftalí SARMIENTO-SOLANO

Online First Date: 20 February 2017 Issue Date: 08 March 2018

Cite this article:

Neftalí SARMIENTO-SOLANO,Miguel P. ROMO. In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir filling[J]. Front. Struct. Civ. Eng., 2018, 12(1): 81-91.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-016-0378-2
https://academic.hep.com.cn/fsce/EN/Y2018/V12/I1/81

Fig.1 Geometrical features CFRDs models

Fig.2 (a) Experimental model of the concrete-concrete interface and (b) numeric model of the contact

Tab.1 Interface elements properties

Tab.2 Material properties of the CFRDs

Fig.3 (a) Location instrumentation, (b) octahedral stress-strain relationship, and (c) octahedral shear stress- shear strain relationship, obtained from in situ measurements in Aguamilpa dam (modified from Alberro et al. [22])

Fig.4 Three dimensional finite difference models of CFRDs

Fig.5 Contours of transversal stresses in the concrete face under first reservoir filling loading.

Fig.6 Maximum in-plane stresses in the concrete face at the end of reservoir filling: (a) compressive and (b) tensile stresses, a = 0.8

Fig.7 Maximum in-plane stresses in the concrete face without construction joints upon reservoir filling. (a) Compressive; (b) tensile stresses

Tab.3 Parameters C and D for Eq. (7)

Fig.8 Maximum in-plane stresses at the central section of the concrete face (y = 0 m) upon reservoir filling

Tab.4 Maximum in-plane transversal stresses in the concrete face

Fig.9 Application example 3D finite difference model, H = 140 m

Fig.10 In-plane stresses at the central section of the concrete face (y= 0 m) upon reservoir filling

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[1]	Neftalí SARMIENTO-SOLANO, Miguel P. ROMO. Dynamic in-plane transversal normal stresses in the concrete face of CFRD[J]. Front. Struct. Civ. Eng., 2019, 13(1): 135-148.
[2]	Martin WIELAND, . Features of seismic hazard in large dam projects and strong motion monitoring of large dams[J]. Front. Struct. Civ. Eng., 2010, 4(1): 56-64.

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