We investigate mortar multiscale numerical methods for coupled Stokes and Darcy flows with the Beavers–Joseph–Saffman interface condition. The domain is decomposed into a series of subdomains (coarse grid) of either Stokes or Darcy type. The subdomains are discretized by appropriate Stokes or Darcy finite elements. The solution is resolved locally (in each coarse element) on a fine scale, allow...

The load-bearing performance of a RC simply supported beam bridge was comprehensively detected and evaluated. appearance detection results show that there is large area damaged exposed reinforcement in the main girder diaphragm plate bridge. detecting material condition state parameters durability insufficient, risk steel corrosion large, strength concrete poor. load test bearing capacity does ...

To find out which render mortar mix shows the best durability properties, we have designed four ageing tests that aim to simulate water movements, ice formation and salt crystallization in lime mortars exposed to an extreme, but realistic, range of temperature and humidity. It has been found that the response of individual mortar mixes differs according to the mechanism and the agent of attack....

Hierarchical a posteriori error estimators are introduced and analyzed for mortar nite element methods. A weak continuity condition at the interfaces is enforced by means of Lagrange multipliers. The two proposed error estimators are based on a defect correction in higher order nite element spaces and an adequate hierarchical two-level splitting. The rst provides upper and lower bounds for the ...

Several a posteriori error estimators for mortar mixed finite element discretizations of elliptic equations are derived. A residual-based estimator provides optimal upper and lower bounds for the pressure error. An efficient and reliable estimator for the velocity and mortar pressure error is also derived, which is based on solving local (element) problems in a higher-order space. The interface...

ABSTRACT: Many traditional brick-and-mortar businesses supplement their physical outlets with e-commerce capabilities on the Web, but there has been lit tle empirical research on the underlying dynamics of the “click-and-mortar” business approach. This paper develops a conceptual framework that highlights the four types of synergies obtained by integrating e-commerce with physical infrastructur...

Mortars containing carbon, polyethylene, and stainless steel fibers at the same volume fraction and with similar fiber diameters were compared in terms of tensile, compressive, and flexural properties. Carbon fibers, though having the lowest tensile modulus, stren[?th, and elongation at break among the fiber types, [?ave mortar of the highest tensile strenf?th and lowest cost; polyethylene fibe...

Cellulose ethers are polymers frequently introduced into mortar formulations in order to improve water retention capacity and workability of the freshly mixed materials. Cellulose derivatives can induce excellent water retention thanks to the possible superposition of two phenomena. Mortar rheology can impact water retention, increasing media viscosity. Other specific effects provided by cellul...

The rehabilitation and reconstruction works are usually performed with a view to conserving these landmarks maintaining them culturally, architecturally structurally. From this perspective, the mortars utilized in repairs must be suitable, physiochemically mechanically, ancient materials used buildings. Accordingly, it was proposed evaluate tufa stone powder, waste product of one most widely fo...

Bond strength is the adhesion between an overlay and a substrate mortar; it key parameter ensuring durability having monolithic system. A proper bond essential to resist any stresses associated with volume changes, freeze-thaw cycles, vibrations at interface. Polymer-modified cement mortar (PCM) one of most well-known adhesive materials, used widely as binding agent in engineering construction....