Additional numerical simulations for highly efficient amplification of local load transmitting areas of timber engineering structures using multiple polymer concrete cast-in joints

• Applicant: Professor Dr.-Ing. Karl Rautenstrauch
• Subject Area: Structural Engineering, Building Informatics and Construction Operation
• Term: from 2012 to 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 224551133

In wide-ranging and highly-utilized wood components often occur local overstressing, which often cause cracking systems with associated load shifts particularly in pressure perpendicular to the grain- and transversal forces. Therefore, the recent successful completion of precursory research project new high-efficiency amplification measures for such local load application areas based on of introduced into bores polymer concrete-cast body were first studied fundamentally. This renewal proposal is directly linked to these recent predominantly experimentally obtained results, use this now as a calibration basis for further studies as well as additional parameters by numerical simulations. Mount this further simulation are detailed findings on the influence of stray material properties, the optimal geometric design of the reinforcing measures (bore diameter depth, inclination, etc.) as well as the structural design of multiple arrangements of such reinforcing bodies (assemblies, minimum distances between themselves and of edges etc.) and thus beyond also contribute to enhance the previously experimentally proven gain opportunities significantly. This procedure is proposed here, since it can be realized in the short term and also in comparison to that effect further experimental studies is the least expensive option. Moreover, it is easily possible on this basis, to identify the necessary material properties and relationships of the different causes of failure. Depending on conditions and varying and scattering material properties, it is thus possible to sufficiently reliable numerical mapping previously studied experimental test series and to verify the input parameters and ratios of the respective materials. Furthermore, where appropriate, as required by the first sensitivity studies the external influences and their impact on the life of the reinforcement measures elicited by such simulations and based on, first substantiated information on the required part of the component design reliable parameter constellations are given. The existing from previous experimental trials large data base and associated photogrammetric measurements of the transient deformation fields are ideally suited for the proposed numerical analysis and parametric studies, so that limited due to these circumstances the application solely on the human resources required for this purpose. Further investments are also not required as synergy existing IT equipment and developed under currently ongoing dissertations own software solutions for numerical simulations can be provided free of charge.

• DFG Programme: Research Grants