Linear elasticityLinear elasticity is a mathematical model of how solid objects deform and become internally stressed due to prescribed loading conditions. It is a simplification of the more general nonlinear theory of elasticity and a branch of continuum mechanics. The fundamental "linearizing" assumptions of linear elasticity are: infinitesimal strains or "small" deformations (or strains) and linear relationships between the components of stress and strain. In addition linear elasticity is valid only for stress states that do not produce yielding.
Constructionvignette|upright|Les grues sont essentielles pour des travaux importants tels que les gratte-ciel. La construction est le fait d'assembler différents éléments d'un édifice en utilisant des matériaux et des techniques appropriées. Le secteur économique de la construction, appelé « bâtiment et travaux publics » (BTP) dans une partie de l'Europe francophone, regroupe toutes les activités de conception et de construction des bâtiments publics et privés, industriels ou non, et des infrastructures telles que les routes ou les canalisations.
Déformation élastiqueEn physique, l'élasticité est la propriété d'un matériau solide à retrouver sa forme d'origine après avoir été déformé. La déformation élastique est une déformation réversible. Un matériau solide se déforme lorsque des forces lui sont appliquées. Un matériau élastique retrouve sa forme et sa taille initiales quand ces forces ne s'exercent plus, jusqu'à une certaine limite de la valeur de ces forces. Les tissus biologiques sont également plus ou moins élastiques. Les raisons physiques du comportement élastique diffèrent d'un matériau à un autre.
Construction managementConstruction management (CM) is a professional service that uses specialized, project management techniques and software to oversee the planning, design, construction and closeout of a project. The purpose of construction management is to control the quality of a project's scope, time / delivery and cost—sometimes referred to as a project management triangle or "triple constraints." CM is compatible with all project delivery systems, including design-bid-build, design-build, CM At-Risk and Public Private Partnerships.
Construction engineeringConstruction engineering, also known as construction operations, is a professional subdiscipline of civil engineering that deals with the designing, planning, construction, and operations management of infrastructure such as roadways, tunnels, bridges, airports, railroads, facilities, buildings, dams, utilities and other projects. Construction engineers learn some of the design aspects similar to civil engineers as well as project management aspects.
Rubber elasticityRubber elasticity refers to a property of crosslinked rubber: it can be stretched by up to a factor of 10 from its original length and, when released, returns very nearly to its original length. This can be repeated many times with no apparent degradation to the rubber. Rubber is a member of a larger class of materials called elastomers and it is difficult to overestimate their economic and technological importance. Elastomers have played a key role in the development of new technologies in the 20th century and make a substantial contribution to the global economy.
Liste de corps d'étatCet article constitue une liste rassemblant selon les répartitions communément usitées les corps de métier dans le domaine du génie civil, communément désignés sous l'appellation collective de corps d'état. Il s'agit d'appellations couramment rencontrées dans les allotissements des marchés de travaux.
Price elasticity of demandA good's price elasticity of demand (, PED) is a measure of how sensitive the quantity demanded is to its price. When the price rises, quantity demanded falls for almost any good, but it falls more for some than for others. The price elasticity gives the percentage change in quantity demanded when there is a one percent increase in price, holding everything else constant. If the elasticity is −2, that means a one percent price rise leads to a two percent decline in quantity demanded.
Elasticity tensorThe elasticity tensor is a fourth-rank tensor describing the stress-strain relation in a linear elastic material. Other names are elastic modulus tensor and stiffness tensor. Common symbols include and . The defining equation can be written as where and are the components of the Cauchy stress tensor and infinitesimal strain tensor, and are the components of the elasticity tensor. Summation over repeated indices is implied. This relationship can be interpreted as a generalization of Hooke's law to a 3D continuum.
Élasticité (économie)vignette|Elasticity-elastic En économie, l'élasticité mesure la variation d'une grandeur provoquée par la variation d'une autre grandeur. Ainsi, pour un produit donné, lorsque les volumes demandés augmentent de 15 % quand le prix de vente baisse de 10 %, l'élasticité de la demande par rapport au prix de vente est le quotient de la variation de la demande rapporté à la variation de prix de vente, soit -1,5 = (15 % / -10 %). Ici toute baisse de prix provoque une augmentation plus importante des quantités vendues.
