Experimentelle und numerische Untersuchungen an Hochleistungsverbindungen mit Zahnleisten

High capacity saw tooth connectors - experimental testing and numerical studies.

The presented paper describes the transfer of concentrated loads from structural steelwork into concrete structures using saw tooth connectors. Saw tooth connectors consists of a thick steel plate with steel teeth which transfer forces into the surrounding concrete via compressive action. Experimental and numerical investigations have been undertaken in order to clarify the ultimate load and the load deflection behaviour. Firstly, experimental studies on the load carrying capacity of the steel teeth/concrete interface have been conducted. The compressive forces onto the teeth have been applied at varying angles of action. The concrete at the connection has a similar load capacity as an undisturbed concrete section. Secondly, a test of a complete connection within a concrete slab has been designed. The saw tooth connector used, was a two sided connector in a situation with compressive reaction. With this, load capacity and load deflection tests in a real live situation have been undertaken. In combination with the also developed numerical model, the tests were interpreted. The investigation concluded in an addition to the structural design concept.