PSI - Issue 84

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ScienceDirect

Procedia Structural Integrity 84 (2026) 1278–1285

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Conference Keywords: 3D CSFM; Discontinuity regions; Anchorage; Ultimate limit state; Bridge reconstruction. Abstract The three-dimensional Compatible Stress Field Method (3D CSFM) represents an advanced analysis and design approach for reinforced concrete discontinuity regions, enabling a realistic description of stress distribution, force redistribution, and reinforcement engagement. In contrast to conventional simplified methods, the 3D CSFM allows direct consideration of spatial stress states while incorporating Eurocode-based material models and verification rules. This paper investigates the applicability of the 3D CSFM method in the reconstruction and assessment of existing bridge structures. Typical practical scenarios are addressed, including the verification of locally loaded pier heads during superstructure lifting for bearing replacement and the evaluation of noise barrier anchorages in bridge cornices near service duct openings. The presented examples demonstrate that the 3D CSFM enables the transparent identification of load-transfer mechanisms, the effective utilization of existing reinforcement, and direct verification at the ultimate limit state, in accordance with EN 1992-1-1 and EN 1992-2. The method, therefore, represents a valuable engineering tool for bridge reconstruction projects where conventional approaches may be insufficient or overly conservative. 1. Introduction In professional engineering practice, reinforced concrete structures frequently contain discontinuity regions (so called D-regions ), as illustrated in Fig. 1. These are parts of the structure where the classical Bernoulli–Navier III Fabre Conference: Existing Bridges, Viaducts, and Tunnels: Research, Innovation, and Applications Application of the 3D CSFM method in bridge reconstruction Pavlina Lakatosova a, * , Lukas Bobek b ,Josef Kveton b a IDEA StatiCa s.r.o., Šumavská 519/35, 602 00 Brno, b Czech Republic² Faculty of Civil Engineering, Brno University of Technology, Veveří 331, 602 00 Brno, Czech Republic

* Corresponding author. E-mail address: info@ideastatica.com

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Conference 10.1016/j.prostr.2026.06.163