Michael Schwenn
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In‐situ installation safety of post‐installed anchorages—Investigations on construction sites Open
The sensitivity to reduced installation effort of post‐installed fastening systems is determined during the product qualification through robustness tests conducted under controlled laboratory conditions. Using the concept of required α ‐f…
Comparison of pull-out capacities of robotically and manually drilled and set fasteners Open
The performance of post-installed fasteners in concrete can be affected by the chosen drilling and setting techniques. In the context of the development of a drilling robot for construction site implementation the impact of an automated se…
Load transfer mechanism of concrete screws Open
Even though the market and development for concrete screws has been increasingly rising in recent years, the load transfer mechanism of concrete screws has not yet been fully investigated. Therefore, different tests of concrete screws made…
Assessment of the Deterioration State of Post-Installed Bonded Anchors Using Ultrasonic Open
The assessment of already installed anchorages for a possible exceeding of the service load level is a question that is gaining more and more importance, especially in building maintenance. Bonded anchors are of particular interest here, a…
Influence of different drilling methods on the behavior of post‐installed mechanical fasteners in uncracked and cracked concrete Open
Innovative drilling methods gain importance in the field of post‐installed fasteners. For this reason, users, customers and manufacturers demand methods other than the standard drilling procedure of hammer drilling, as they are hollow dril…
Statistical Evaluation of the Perpendicularity of Boreholes in Concrete for Post-Installed Fasteners Open
The form and the perpendicularity of boreholes influence the ultimate behaviour of post-installed fasteners and are restricted with regard to the concrete surface to 5° in Europe and to 6° in the United States in various regulations (e.g.,…
Post‐installed mechanical fasteners in high strength and ultra‐high strength performance concrete Open
Post‐installed fastening systems are essential in structural engineering nowadays. Triggered by the increasing popularity of high strength concrete (HSC) and ultra‐high performance concrete (UHPC), fastening in these basements is more and …
Issue Information: Structural Concrete 1/2019 Open
Experimental study on effect of length of
Strengthening of Reinforced Concrete Beams with Externally Mounted Sequentially Activated Iron-Based Shape Memory Alloys Open
Iron based shape memory alloys (Fe-SMA) have recently been used as active flexural strengthening material for reinforced concrete (RC) beams. Fe-SMAs are characterized by a shape memory effect (SME) which allows the recovery of previously …
Concrete screws in contact with reinforcement Open
Concrete screws have become increasingly significant in recent years as a result of their availability on the market and their easy application. Still, the influence of reinforcement on deterioration and load‐bearing behavior of concrete s…