As part of the research colloquium for students, doctoral and habiliation candidates, we cordially invite you to join us on Tuesday, 11.11.2025 at 16:30 in room 3516 (Mönchebergstr. 7). Mrs. Sarah Kizia will present the results of her bachelor thesis at the Insitute of Structural Analysis in her lecture entitled "Analysis of redundancy distributions in different structural types of building and bridge construction". We look forward to seeing you there!

Abstract

Since the degree of static indeterminacy of a structure only indicates how many elements can be removed from the system without impairing its load-bearing capacity, this figure alone is not sufficient to determine the distribution of reserves within the system. The redundancy distribution was therefore used for further assessment. With this method, the degree of static indeterminacy can be assigned to the individual components of the structure, whereby the distribution of the load-bearing reserves within the system can be determined and analyzed.

The systems investigated in this thesis are limited to plane beam structures in building and bridge construction. To investigate the influence of different parameters on the redundancy distribution, cross-section parameters and system geometries were systematically varied. In addition, a topological analysis of the arrangement of stiffening diagonals was carried out with the aim of achieving the most homogeneous redundancy distribution possible. This is considered to be particularly favorable due to the uniform distribution of redundancies in the system.

Another focus was on the influence of plastic load-bearing capacity reserves due to the formation of yield joints. In particular, it was analyzed at which points yield joints are preferentially formed and how their formation affects the redistribution of redundancy components within the system.