Messung der Betondeckung — Auswertung und Abnahme

Measurement of Concrete Cover — Evaluation and Approval The measurement of concrete cover is a method to estimate the quality of building execution. The concrete cover is a probabilistic dimension. The paper gives an approximate method basing on the Neville‐distribution to evaluate the results of a concrete cover measurement. This approximation is usable with simple software. The approximate method is used in a code of practice “Concrete Cover and Reinforcement” of the German Society for Concrete and Construction Technology (DBV).     

Hintergründe zur Nutzlastabminderung nach DIN 1055‐3

Background of Load Reduction according to DIN 1055‐3 The present study focuses on possibilities of load reduction according to DIN 1055‐3. The respective code regulations will be presented as well as the outcome of the investigation concerning imposed loads in domestic buildings. The results are representative for the load variability of imposed loads and may be applied to other building categories.     

Zuverlässigkeit von Mauerwerk aus großformatigen Steinen

Reliability of masonry consisting of large sized units. Within the scope of the harmonisation of the European design codes the partial safety concept has been recommended also for masonry structures. This requires the values of the partial safety factors to be discussed. Whereas for steel and concrete structures a large amount of studies have been conducted, this is not the case for masonry structures. This explains the large scatter of the partial safety factors suggested for the resistance side for the design unreinforced masonry in international codes. In this paper, the reliability of unreinforced masonry walls under compression made of large sized units will be analysed. A suggestion for optimized partial safety factors will be given.     

Berücksichtigung der Längsbewehrung beim Durchstanznachweis nach Eurocode 2 (DIN EN 1992‐1‐1/NA)

Consideration of flexural reinforcement in punching shear provisions according to Eurocode 2 (DIN EN 1992‐1‐1/NA) With introduction of Eurocode 2 in Germany in 2012, the pun ching shear design provisions of flat slabs and column bases were revised compared to DIN 1045‐1. Particularly the consi deration of flexural reinforcement caused some irritations for practical engineers. In this context, this paper presents recent recommendations of DIN technical committee ”NABau“ (DIN: German institute for standardization) for the distribution of minimum flexural reinforcement for wall corners and wall edges as well as for the width and anchorage of flexural reinforcement for the calculation of the flexural reinforcement ratio in flat slabs and column bases.