ULTIMATE LOAD AND WORKING LOAD OF COMPOSITE STRUCTURES (PRESTRESSED CONCRETE AND STEEL GIRDER)

METHODS OF CALCULATING THE ULTIMATE LOAD ARE CONSIDERED ON A UNIFORM BASIS AND SYSTEMATICALLY PREPARED FOR APPLICATION TO COMPOSITE CONSTRUCTION INCLUDING PRESTRESSED CONCRETE. FUNDAMENTAL LAWS OF MATERIALS AND REGULATIONS ARE CONSIDERED. FOR THE DETERMINATION OF CROSS-SECTIONAL VALUES A COLLECTION OF FORMULAE HAVE BEEN PREPARED. A DESIGN PROCEDURE IS SHOWN FOR CUSTOMARY PRESTRESSED CONCRETE CROSS-SECTIONS, WHICH ALLOWS AN EXACT EVALUATION OF SHRINKAGE AND CREEP, AND ONE FOR THE EVALUATION OF THE ULTIMATE BEARING CAPACITY OF SECTIONS AND FOR THE LOCATION OF THE NEUTRAL AXIS. BY MEANS OF NUMERICAL EXAMPLES THE EFFECT OF THE ULTIMATE LOAD PROCESS CAN BE SEEN. THE SUPPLEMENT CONTAINS A DESCRIPTION OF THE COMPUTER PROGRAM, BY MEANS OF WHICH TRANSVERSE VALUES AND STRESSES FROM NORMAL LOADS FOR CHOSEN COMPOSITE SECTIONS MAY BE OBTAINED, TOGETHER WITH THEIR ULTIMATE BEARING CAPACITIES, TAKING INTO CONSIDERATION ANY PRE-DEFORMATION.