Size effect on shear strength of FRP reinforced concrete beams

yesThis paper presents test results of six concrete beams reinforced with longitudinal carbon fiber reinforced polymer (CFRP) bars and without vertical shear reinforcement. All beams were tested under a two-point loading system to investigate shear behavior of CFRP reinforced concrete beams. Beam depth and amount of CFRP reinforcement were the main parameters investigated. All beams failed due to a sudden diagonal shear crack at almost 45°. A simplified, empirical expression for the shear capacity of FRP reinforced concrete members accounting for most influential parameters is developed based on the design-by-testing approach using a large database of 134 specimens collected from the literature including the beams tested in this study. The equations of six existing design standards for shear capacity of FRP reinforced concrete beams have also been evaluated using the large database collected. The existing shear design methods for FRP reinforced concrete beams give either conservative or unsafe predictions for many specimens in the database and their accuracy are mostly dependent on the effective depth and type of FRP reinforcement. On the other hand, the proposed equation provides reasonably accurate shear capacity predictions for a wide range of FRP reinforced concrete beams

Literatur im Museum: Gerhard Rühm lädt zum Mitmachen ein

Das Bank Austria Kunstforum Wien zeigte mit der Ausstellung "Gerhard Rühm" im Herbst 2017 einen Universalkünstler der zwischen allen Medien und Kunstformen changiert. Sein vielschichtiges Oevre bietet sich wunderbar an, um Literatur und Sprache im Museum erlebbar zu machen. Die Autorinnen bringen uns drei sehr unterschiedliche Beispiele aus ihrer Literaturvermittlungsarbeit im Ausstellungs-Kontext

The purpose and effects of earthquake codes

abstract When large earthquakes occur and there is significant damage and destruction of building structures, an almost universal response is the demand for better (and usually bigger) building codes. This paper examines the effects of this public outcry for protection with respect to the economic consequences, the actual process of seismic code formulation, and the technical adequacy of our present knowledge and design procedures. Some general directions are suggested such that new codes can be: better understood with respect to their intended design objectives; economically feasible; and practically enforceable.</jats:p