engleski

Concrete edge breakout of anchor channels—On the influence of member thickness and installation in pockets

Anchor channels are frequently used in curtain wall applications and are expected to meet several requirements, such as installation in floor slabs with limited member thickness, small edge distances, pockets, etc. An extensive numerical parametric study and an experimental investigation were conducted to evaluate all the relevant parameters affecting the concrete edge breakout failure. The influence of member thickness and the influence of pockets on the concrete edge breakout capacity of anchor channels in uncracked and unreinforced concrete members is investigated. The results show that the current characteristic member thickness becomes too conservative with increasing edge distance, whereas the verification based on the current model may result in slightly overestimated capacities for thin members. Moreover, in some countries it is common to install the curtain wall fastening point in a recess of the concrete member often called a “pocket.” The most important parameters affecting the capacity of anchor channels in pockets are the edge distance, pocket size and height, and reduced member thickness. Modifications of the current concrete design model are proposed, as well as an additional modification factor to account for the influence of pockets.

anchor channels ; characteristic member thickness ; concrete edge breakout ; influence of member thickness ; modification factor ; pockets

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