STUDIES OF THE BEARING CAPACITY OF ECCENTRICALLY STRESSED REINFORCED CONCRETE WALLS

UNTERSUCHUNGEN UEBER DIE TRAGLASTEN AUSMITTIG BEANSPRUCHTER STAHLBETONWAENDE

THE OBJECT OF THE PLANNED STUDY IS TO PREPARE THE FOUNDATION FOR THE DEVELOPMENT OF PRACTICAL AIDS FOR THE DESIGN OF REINFORCED CONCRETE WALLS. RESEARCH IS TO BE CONCENTRATED ON THE FOLLOWING: THE STRESSES IN ECCENTRICALLY LOADED SLIM REINFORCED CONCRETE WALLS HAVE TO BE CALCULATED ACCORDING TO THE SECOND ORDER THEORY, TAKING ACCOUNT OF THE BOUNDARY CONDITION AND THE ACTUAL DEFORMATION BEHAVIOUR OF THE MATERIALS CONCRETE AND STEEL. IN A CALCULATION OF THIS NATURE, THE TORSIONAL STIFFNESS OF AN ECCENTRICALLY LOADED WALL HAS TO BE IGNORED AS IT DECREASES MARKEDLY DIRECTLY BEFORE FRACTURE, THAT IS, IN THE CRACKED STATE, AS TORSION TESTS HAVE SHOWN. UNDER THIS CONDITION THE PROBLEM CAN BE REDUCED TO TWO INTERSECTING PAIRS OF REINFORCED CONCRETE COMPRESSION MEMBERS WHICH ARE LINKED AT DISCRETE POINTS. A CORRESPONDING PROGRAM IS TO BE BUILT UP FROM ALREADY EXISTING COMPUTER PROGRAMS FOR ECCENTRICALLY LOADED COMPRESSION MEMBERS. IN A SECOND SECTION THE THEORETICAL RESULTS THUS OBTAINED ARE TO BE TESTED IN REINFORCED CONCRETE WALLS. FOR THIS, WALLS HAVING A NAVIER SUPPORT ON FOUR SIDES HAVE TO BE PROVIDED. THESE TESTS ARE MERELY INTENDED TO CONFIRM THE THEORETICAL RESULTS, AND ONLY INFLUENCES OF THE LATERAL CONDITIONS, THE SUPPORT CONDITIONS AND THE ECCENTRICITY ARE TO BE STUDIED.