DANS LE DOMAINE DES INCENDIES EN TUNNEL, LA SIMULATION NUMERIQUE DEVIENT PREPONDERANTE COMPTE TENU DES PHENOMENES MULTIPLES ET COMPLEXES MIS EN JEU. A CAUSE DE CETTE COMPLEXITE SE REPERCUTANT AU NIVEAU DU CODE DE CALCUL, UNE PHASE DE VALIDATION ENTRE SIMULATION ET EXPERIENCE A ETE ENTREPRISE ET A FOURNI DES RESULTATS TRES ACCEPTABLES. CEPENDANT, AVANT D'EFFECTUER CETTE COMPARAISON, NOUS AVONS PROCEDE A UN CERTAIN NOMBRE DE TESTS NUMERIQUES POUR DEFINIR LA FACON LA PLUS ADEQUATE DE MODELISER UN INCENDIE EN TUNNEL. CETTE ETUDE DE SENSIBILITE NOUS A NOTAMMENT PERMIS DE MONTRER QUE DANS CERTAINE CONDITION DE MODELISATION, UN DOMAINE DE CALCUL A L'EXTERIEUR DU TUNNEL DEVAIT ETRE REPRESENTE. EN FONCTION DE LA COMPLEXITE DU PROBLEME MODELISE, LA DIMINUTION DES TEMPS DE CALCUL DEVIENT UN PROBLEME MAJEUR. POUR LIMITER LA DUREE D'UNE SIMULATION NUMERIQUE, LA PREMIERE METHODE ENVISAGEE CONSISTAIT A TRANSFORMER LE PROBLEME TRIDIMENSIONNEL EN UN PROBLEME BIDIMENSIONNEL EN CONSERVANT CERTAINES QUANTITES PHYSIQUES (FROUDE, REYNOLDS). CEPENDANT, ON A MONTRE QUE CETTE METHODE N'ETAIT PAS APPLICABLE NOTAMMENT EN PRESENCE D'UN RETOUR DE FUMEE A CONTRE COURANT DE LA VENTILATION. POUR CONTOURNER CETTE DIFFICULTE, NOUS AVONS DONC ETE AMENES A DEVELOPPER UNE SECONDE METHODE VALABLE DANS TOUTES LES SITUATIONS, ET BASEE SUR LE COUPLAGE AUTOMATIQUE DE SIMULATIONS NUMERIQUES BIDIMENSIONNELLES ET TRIDIMENSIONNELLES. DANS CETTE PROCEDURE DE COUPLAGE, ON DECOMPOSE LE TUNNEL EN TROIS ZONES DISTINCTES : LA ZONE DU FOYER MODELISEE EN 3D, ET LES ZONES SITUEES DE CHAQUE COTE MODELISEES EN 2D. CES TROIS SIMULATIONS EFFECTUEES SIMULTANEMENT, SONT COUPLEES PAR L'INTERMEDIAIRE DE DEUX ZONES DE RECOUVREMENT PERMETTANT DES ECHANGES PERMANENTS D'INFORMATIONS ENTRE LES DIFFERENTS CALCULS. LES RESULTATS PROVENANT DE CETTE PROCEDURE DE COUPLAGE SONT SIMILAIRES A CEUX OBTENUS EN MODELISANT LA TOTALITE DU TUNNEL EN 3D.

Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.

This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Margaret Mead collaborated with her long-time colleague Rhoda Métraux in this unique study of French culture. The Hoover Institute at Stanford University originally published this volume, which grew out of the Columbia University project on Research of Contemporary Cultures in 1954. It is one of the few works by American social scientists dealing with broad themes of French life. Mead and Métraux present a vivid picture of the French starting with the organization of the house and its architecture, and drawing original conclusions for the structure of French families and overall cultural values. This work, long out of print, is a fascinating and penetrating portrait of a contemporary European society.