Project title: Impact of eccentric axial loading at the wall-slab-joint on the shear resistance of monolithic load-bearing clay brick masonry walls
Funding authorities: BMWI – Bundesministerium für Wirtschaft und Energie

IGF – Industrielle Gemeinschaftsforschung

AIF – Arbeitsgemeinschaft industrieller Forschungsvereinigungen

Funding code: IGF-Projekt Nr. 19406 N
Research association: Forschungsgemeinschaft Ziegelindustrie e.V. (FGZ)
Project partners: Chair of Structural Analysis and Dynamics (CSAD), RWTH Aachen


Chair of Concrete and Masonry Structures  (LM), Technical University of Munich


Project coordinator: Prof. Dr.-Ing. Christoph Butenweg

Tel: +49 (0) 241 – 60 09 53 16 0


Project duration: 01.03.2017 – 31.10.2020

Project Description:

Modern masonry structures shall be designed to meet the demands in terms of architecture, statics, energy, sound insulation and fire protection. The complex interaction of the requirements with partially contradictory goals leads to complex structural details and often to a full utilisation of the static load-bearing capacity of masonry. A typical detail results from the increased requirements of thermal insulation for the slab support on monolithic load-bearing clay brick masonry walls.

[Arge Mauerziegel e.V. 2012]

A sufficient insulation can only be achieved by the installation of a frontal insulation on the slab, which leads to a substantial reduction of the support length for the slab. The reduced support length results in increased rotations of the slab generating clamping moments and localised stresses at the top of the wall, which, however, has so far been completely ignored in construction practice. Furthermore, it is well known that the resulting wall imperfections due to the eccentric load transfer reduce substantially the buckling resistance of the wall.

The objective of the project is the detailed investigation of the effect of eccentric vertical loads at the wall-slab joint on the shear resistance of unreinforced masonry walls made of clay brick by experimental and computational investigations and to close the existing knowledge deficit. As an essential result for building practice, comprehensible calculation and design approaches are derived from the investigations, with which the effects of eccentric load introduction can be taken into account. The application of these new approaches will be demonstrated with specific practical examples in order to successfully transfer the results into practice. The intended project results support the monolithic construction method, which is significantly more economical and sustainable than other construction methods.

The IGF project “Impact of eccentric axial loading at the wall-slab-joint on the shear resistance of monolithic load-bearing clay brick masonry walls”, IGF Project No. 19406 N, Forschungsgemeinschaft Ziegelindustrie e.V. (FGZ), Reinhardtstraße 12-16, 10117 Berlin was funded by the AiF as part of the program for the promotion of industrial joint research (IGF) by the Federal Ministry for Economic Affairs and Energy on the basis of a resolution of the German Bundestag. We would like to express our great appreciation to these organizations for their generous support.