National Academy of Engineering tribute to Professor Kaspar J. Willam, presented at FraMCoS-12. Submitted to the US National Academy of Engineering (NAE) for publication in the volume of Tributes KASPAR J. WILLAM December 20, 1940 – January 7, 2024 Elected to NAE in 2004 1 1 2 3 Josef Eberhardsteiner , Herbert A. Mang ,
Official programme booklet for FraMCoS-12. April 23-25, 2025 | Vienna, Austria © rh2010 – stock.adobe.com th 12 International Conference on Fracture Mechanics for Concrete and Concrete Structures Dedicated to the Legacy of Prof. Kaspar Willam Conference Programme Editors: Bernhard Pichler, Christian Hellmich, Philipp Preinstorfer SPONSORS & EXHIBITORS CONFERENCE APP The Conference4me smartphone app provides you
The present work attempts to address the issue of constitutive response and consistency of plastic strain-induced anisotropy of Lee-Fenves Concrete Damaged Plasticity (CDP) constitutive model. The CDP model, which comes to be available within the ABAQUS commercial FEM platform, shall be able to reproduce typical features of the failure process of quasi-brittle materials subjected to
Reinforcement corrosion due to chloride ingress or carbonation is an important deterioration mechanism, which may compromise the service life of reinforced concrete structures. This paper presents an efficient macro-scale model, aiming to capture the most important aspects of the deterioration of reinforced concrete structures due to reinforcement corrosion. A chemo- mechanical model covers the initiation
Theneedforimprovedpunchingshearperformanceisconstantlyunderreview,particularly for slabs between stories or in indoor parking garages of collective buildings. As a part of this effort, the detailed finite element model for this slab was discussed. For the benchmark and parametric analysis of the failure tests conducted by fib, the overall punching shear load-vertical displacement relationship, local reinforcement strain, and concrete cracking
It is not fully understood how corrosion-induced cracking in reinforced concrete is affected bycorrosionrate. Improvedunderstandingofthiseffectisimportantbecauseitassistswithpredicting the state of structures which suffer from corrosion-induced cracking based on results of accelerated laboratorytestswithconfidence. Possiblereasonsfortheeffectofcorrosionrateoncorrosion-induced cracking are creep of concrete, migration of corrosion products into pores and cracks, and composi- tion of corrosion products. Here, we test the effect
The prediction of the leakage rate of containment vessels in double-walled nuclear power plants is of particular importance given the role of the structure. As the third containment barrier, it must indeed guarantee a certain level of leak tightness in order to perform its function fully. Traditionally, the estimation of the leakage rate is based
Crack pattern induced by alkali-silica reaction (ASR) varies depending on environmental conditions, which affects the mechanical properties of concrete. This study aims to investigate the change in mechanical behaviors of ASR-damaged concrete with respect to acceleration temperature and crack pattern. Cylinder specimens were fabricated and immersed in 1 mol/L NaOH solution at two different temperatures,
Concrete is considered a heterogeneous material composed of aggregates enclosed by a mortar matrix. The Finite Element analysis is performed by inserting zero-thickness interface elements in between continuum elements along pre-selected paths representing main potential crack paths. These interface elements are equipped with a fracture-based constitutive law. In previous literature this approach has been shown
This paper summarizes the authors’ previous work on modeling and numerical simulation techniques for concrete residual mechanical performance evaluation, which has expanded owing to various factors, including alkali-silica reactions (ASRs), frost damage, and delayed ettringite formation (DEF). By varying the mechanical constitutive law and expansion strain proportion considered according to the different crack characteristics and