Entity

Time filter

Source Type

Katy, TX, United States

Eggers P.J.,GEI Consultants Inc. | Dwight J.,Menard | Grant C.B.,GEI Consultants Inc. | Hurd M.C.,GEI Consultants Inc.
Geotechnical and Structural Engineering Congress 2016 - Proceedings of the Joint Geotechnical and Structural Engineering Congress 2016 | Year: 2016

Wolf Creek Generating Station, a nuclear power plant located in central Kansas, recently completed a project to improve the essential service water (ESW) piping system that supplies water to cool the reactor. Part of the project involved the construction of retaining walls in the cooling water reservoir adjacent to the existing ESW pumphouse to retain new earth embankments. Site conditions and operational restrictions dictated the use of a wall system that would not interfere with the pumphouse or encroach on the reservoir, that could be constructed without temporary cofferdams or dewatering, and that could meet the design and construction quality assurance requirements for nuclear safety-related structures. To meet these requirements, a cantilever retaining wall system consisting of nearly-Tangent large-diameter rock-socketed drilled shafts was designed to resist conventional earth retention and bulkhead wall loads as well as forces associated with tornado-generated missiles. The steel-cased reinforced concrete shafts were installed from a barge, a cast-in-place concrete cap beam was built to tie the shafts together, and rock fill was placed behind the walls to form the new embankments. © ASCE. Source


Duplan F.,CNRS Materials and Construction Durability Laboratory | Abou-Chakra A.,CNRS Materials and Construction Durability Laboratory | Turatsinze A.,CNRS Materials and Construction Durability Laboratory | Escadeillas G.,CNRS Materials and Construction Durability Laboratory | Masse F.,Menard
Structural Concrete | Year: 2015

The standard European building specifications, grouped in a nine-volume Eurocode, describe different approaches for determining the properties of commonly used building materials such as steel, aluminium, concrete, etc. The American Concrete Institute (ACI) also offers different reports concerning concrete structures (ACI 318R), lightweight concrete (ACI 213R) and the long-term mechanical behaviour (ACI 209R) of concrete. Those reports, used as building codes, are applicable when the properties and composition of the material respect various criteria. All those materials that do not meet the scope criteria of Eurocode 2 or ACI reports because of their composition, property values or application cannot be used in the design of structures with those building codes. Regarding cement-based materials, concretes and mortars whose compressive strength is lower than the minima might not be useful for structures; however, they present an interesting potential for applications such as infrastructure materials, slabs-on-ground, etc. When designing structures and infrastructures in those materials, the accuracy of any formula offered by those building codes should be checked before being used. This article compares experimental measurements and predictive formulas for the engineering properties (compressive and tensile strengths, modulus of elasticity). The results show that the addition of specific aggregates with low stiffness and strength modifies the relation between those engineering properties, thus reducing the accuracy of some of the predictive formulas suggested in ACI reports or Eurocodes. Copyright © 2015 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source


Lajevardi S.H.,INSA Lyon | Dias D.,University Grenoble alpes | Racinais J.,Menard
Geotextiles and Geomembranes | Year: 2013

The interface friction coefficient is an important design parameter for reinforced soil structures where the friction between the soil and reinforcement elements is mobilized. The pull-out test is the most commonly adopted method to identify this friction coefficient. In this paper, 18 pull-out tests were conducted on two types of welded steel meshes (normal and dense mesh) embedded in a sand to investigate the soil/reinforcement interaction. The tests were conducted under vertical stresses ranging from 20 to 140kPa on the reinforcement. The French standard (. NF P 94-270, 2009) uses an analytical method to predict the friction coefficient. The comparison with the experimental results agrees reasonably well. Ju etal. (2004) developed a new test method based on a staged pull-out test for extensible reinforcements. In this study and for inextensible reinforcement, this new test method has also been used. In a usual pull-out test, only one vertical stress has been used. For a staged pull-out test, several vertical stresses are used. The results of staged pull-out tests are in good agreement with results of usual pull-out test. © 2013 Elsevier Ltd. Source


Lajevardi S.H.,Islamic Azad University of Arak | Dias D.,Grenoble Alpes University | Racinais J.,Menard
Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015 | Year: 2015

The behaviour of the interface is an important parameter for reinforced soil structures where the friction between the soil and reinforcement elements is mobilized. The pull-out test is the most commonly adopted method to identify the friction coefficient. In this paper, 18 pull-out tests were conducted on two types of welded steel meshes (normal and dense mesh) embedded in a sand to investigate the soil/reinforcement interaction. The tests were conducted under vertical stresses ranging from 20 to 140kPa on the reinforcement. The French standard (NF P 94-270, 2009) uses an analytical method to predict the friction coefficient. The comparison with the experimental results agrees reasonably well. Ju et al. (2004) developed a new test method based on a staged pull-out test for extensible reinforcements. In this study and for inextensible reinforcement, this new test method has also been used. In a usual pull-out test, only one vertical stress has been used. For a staged pull-out test, several vertical stresses are used. The results of staged pull-out tests are in good agreement with results of usual pull-out test. © The authors and ICE Publishing: All rights reserved, 2015. Source


Trademark
Menard | Date: 2012-02-11

Eyewear; Eyewear, namely, sunglasses, eyeglasses and ophthalmic frames and cases therefor; Eyewear, namely, novelty party eyewear.

Discover hidden collaborations