Laboratory of Solid Structures LSS

Research in the area of

Solid Structures

at the University of LuxembourgAss.-Prof. Dr.-Ing. Danièle Waldmann-Diederich

Reinforced and prestressed concrete structures

“Structures en béton armé et précontraint”

Research group: 2 PostDocs and 6 PhD students

Laboratory of Solid Structures LSS

Laboratory of Solid Structures

Strategy of Laboratory of Solid Structures

Visibility towards the “outside world”

Integration of UL into Luxembourg

Reference point for industry, engineering consultancies and administrations

Main research subjects

Smart buildings

Smart structures

Demountable structures

Circular economy

aligned with the strategy of the Institute of Civil and Environmental Engineering.

Laboratory of Solid Structures LSS

Research areas

New innovative concrete formulationSubstitution of cement and traditional aggregates by waste or renewable products aiming at a reduction of energy consumption reduction of consumption of natural resources and a reduction of CO2 production

Structural analysis of concrete structures

Analytical, numerical and experimental analysis of reinforced concrete or prestressed concrete

structures

Computational modelling for concrete

Multi-Physics Numerical Simulation of the chemical, mechanical and thermal material behaviour of concrete

Laboratory of Solid Structures LSS

New innovative concrete formulationSubstitution of cement and traditional aggregates by waste or renewable products aiming at a reduction of energy consumption reduction of consumption of natural resources and a reduction of CO2 production

Structural analysis of concrete structures

Analytical, numerical and experimental analysis of reinforced concrete or prestressed concrete

structures

Computational modelling for concrete

Multi-Physics Numerical Simulation of the chemical, mechanical and thermal material behaviour of concrete

Research areas

Set of problems

Contributions

• Heterogeneity, complex microstructures, complex hardening• Interfacial behavior• Complex crack network: initiation, propagation and coalescence

• Microcracking – Phase field method• Complex microstructure • Interfacial damage

Experiment

Simulation

Computational modelling and experimental techniques of fracture mechanics in concrete

Laboratory of Solid Structures LSS

Regularized form

Computational modelling and experimental techniques of fracture mechanics in concrete

Animation of crack evolution during hydration process

Multi-physics models of cement hydration induced crack propagation

Laboratory of Solid Structures LSS

Phase field model with coupled multi-physics process:

• Coupling chemo-thermo-mechanical problems• Heat of hydration, thermal expansion• Material strength development• Autogenous shrinkage• Basic creep, thermal transient creep

Contributions

3 journal publications in Top 10 journals:

Experimental and numerical analysis of early age behavior in non-reinforced concreteNguyen, Thanh Tung; Weiler, Michael; Waldmann, Danièlein Construction and Building Materials (2019), 210

Role of interfacial transition zone in phase field modeling of fracture in layered heterogeneous structuresNguyen, Thanh Tung; Waldmann, Danièle; Bui, T. Q.in Journal of Computational Physics (2019), 386

Computational chemo-thermo-mechanical coupling phase-field model for complex fracture induced by early-age shrinkage and hydration heat in cement-based materialsNguyen, Thanh Tung; Waldmann, Danièle; Bui, T. Q.in Computer Methods in Applied Mechanics and Engineering (2019), 348

Computational modelling and experimental techniques of fracture mechanics in concrete

Laboratory of Solid Structures LSS