Andrea Mordini | Fluor - Academia.edu (original) (raw)

Papers by Andrea Mordini

Research paper thumbnail of Structural Assessment of the Mignano Solid-Gravity Dam Based on the Monitoring Data

Structural Engineering International, 2012

Research paper thumbnail of Vcupdate, a Numerical Tool for Finite Element Model Updating

Research paper thumbnail of Dynamic Studies on an Austrian High-Speed Composite Railway Brigde

Research paper thumbnail of 3D model for the evaluation of multiaxial fracture behaviour of reinforced concrete members

A three-dimensional model for the analysis of RC members, with particular reference to the cracke... more A three-dimensional model for the analysis of RC members, with particular reference to the cracked stage, is proposed in terms of secant stiffness matrix. This formulation has been obtained by taking into account the flexibility contributions of cracks and of the concrete between adjacent cracks both in the singly and in the multi-cracked stages. The model includes all the interface phenomena generated along cracks, such as aggregate bridging and interlock, tension stiffening and dowel action. Finally, the model has been implemented into a Finite Element code and it has been validated through the comparison with significant experimental data. Full-text available at: http://www.gruppofrattura.it/ocs/index.php/ICMFF/ICMFF9/paper/download/11768/10937

Research paper thumbnail of Damage Detection on Stay Cables using an Open Source-based Framework for Finite Element Model Updating

Structural Health Monitoring, 2008

An open source software-based solution for Finite Element Model Updating is presented. The calcul... more An open source software-based solution for Finite Element Model Updating is presented. The calculation technique has been carried out by developing VCUPDATE, a Scilab (MATLAB-like software) code performing the iterative updating algorithm interfaced with OpenSees executing the Finite Element analysis. The code has been verified by many different applications on stay cables. The dynamic test results from real structures are applied if available. Otherwise, the investigated structures are numerically generated by OpenSees.

Research paper thumbnail of Damage Identification on Steel Torsional Bracings Based on Dynamic Monitoring

Structural Health Monitoring is nowadays a field of great concern due to the constant aging of in... more Structural Health Monitoring is nowadays a field of great concern due to the constant aging of infrastructures. The request of structural reliability evaluation and remaining life assessment is, therefore, assuming a major importance in order to reduce the maintenance costs and to increase the safety level of the structures. The Europabrücke is an important and well-known Austrian steel bridge located on the highway connecting Austria with Italy through the Brenner Pass and characterized by a high traffic level. In this context, the assessment of the structural conditions is a critical issue. In this contribution, the experimental and numerical investigation carried out on the torsional bracings of the Europabrücke are presented and discussed in detail.

Research paper thumbnail of The Finite Element Model Updating: A Powerful Tool for Structural Health Monitoring

Structural Engineering International, 2007

The request of non-destructive methods for evaluation of the structural reliability is nowadays c... more The request of non-destructive methods for evaluation of the structural reliability is nowadays constantly increasing. The VCUPDATE solution for finite element model updating is presented. VCUPDATE is a Scilab code performing an iterative updating algorithm interfaced with a finite element code (OpenSees or ANSYS) executing the numerical analysis. The code has been verified by many different applications on beams and stay cables. In this contribution, the code is applied to two real cases using OpenSees as well as ANSYS.

Research paper thumbnail of Automatic FE Update after Monitoring of Eigenmodes of Cables

To determine the real behavior of cables measurements can provide the necessary information. 3 ac... more To determine the real behavior of cables measurements can provide the necessary information. 3 acceleration sensors are applied to the cable in a predetermined distance. The synchronous recording gives information on the mode shapes of the cable and varying conditions. From this information not only the tension force can be extracted but also the bending stiffness and the behavior of eventual damping devices closed to the anchorages. The free length of vibration is determined as well. The results of the measurements are used to perform an automatic model update. By providing the coordinates of the 2 anchorage points a FEM model is automatically generated. The update uses the information from the measurements to determine the representative model. The free software Opensees is used.

Research paper thumbnail of A general 3D approach for the analysis of multi-axial fracture behavior of reinforced concrete elements

Engineering Fracture Mechanics, 2011

The behavior of cracked reinforced concrete structural components is here analyzed through a thre... more The behavior of cracked reinforced concrete structural components is here analyzed through a three-dimensional model, which includes all the interface phenomena generated along cracks, such as aggregate bridging and interlock, tension stiffening and dowel action, as well as the non-linear response of concrete in compression and in tension. The model is able to effectively describe the progressive development of multi-axial cracking, by considering the crack re-orientation and the change of the crack spacing as loading increases. The proposed formulation, which is expressed in terms of secant stiffness matrix, is obtained by taking into account the flexibility contributions of cracks and of the concrete between adjacent cracks, in both the singly and the multi-cracked stage. Finally, this model is implemented into a finite element code and is validated through comparisons with significant experimental data available in the literature.

Research paper thumbnail of An innovative earthquake isolation system using fibre reinforced rubber bearings

Engineering Structures, 2008

In this contribution, a new innovative isolation system for structures in earthquake regions is p... more In this contribution, a new innovative isolation system for structures in earthquake regions is presented. The system consists of high damping rubber bearings strengthened with glass fibre fabrics. A wide parametric numerical investigation through Finite Element Analysis is carried out in order to develop and verify analytical models for these new isolation devices. Experimental investigations provided useful information for numerical modelling and derivation of analytical approaches. Comparisons with simplified formulations are reported as well. In order to demonstrate the effectiveness of the proposed solution and to verify the reliability of the numerical simulations, the new devices are applied to the seismic analysis of a liquid storage tank, a strategic structure for civil protection.

Research paper thumbnail of The Finite Element Model Updating: A Powerful Tool for Structural Health Monitoring

Structural Engineering International, 2007

The request of non-destructive methods for evaluation of the structural reliability is nowadays c... more The request of non-destructive methods for evaluation of the structural reliability is nowadays constantly increasing. The VCUPDATE solution for finite element model updating is presented. VCUPDATE is a Scilab code performing an iterative updating algorithm interfaced with a finite element code (OpenSees or ANSYS) executing the numerical analysis. The code has been verified by many different applications on beams and stay cables. In this contribution, the code is applied to two real cases using OpenSees as well as ANSYS.

Research paper thumbnail of Damage Detection on Stay Cables using an Open Source-based Framework for Finite Element Model Updating

Structural Health Monitoring-an International Journal, 2008

An open source software-based solution for Finite Element Model Updating is presented. The calcul... more An open source software-based solution for Finite Element Model Updating is presented. The calculation technique has been carried out by developing VCUPDATE, a Scilab (MATLAB-like software) code performing the iterative updating algorithm interfaced with OpenSees executing the Finite Element analysis. The code has been verified by many different applications on stay cables. The dynamic test results from real structures are applied if available. Otherwise, the investigated structures are numerically generated by OpenSees.

Research paper thumbnail of Structural Assessment of the Mignano Solid-Gravity Dam Based on the Monitoring Data

Structural Engineering International, 2012

Research paper thumbnail of Vcupdate, a Numerical Tool for Finite Element Model Updating

Research paper thumbnail of Dynamic Studies on an Austrian High-Speed Composite Railway Brigde

Research paper thumbnail of 3D model for the evaluation of multiaxial fracture behaviour of reinforced concrete members

A three-dimensional model for the analysis of RC members, with particular reference to the cracke... more A three-dimensional model for the analysis of RC members, with particular reference to the cracked stage, is proposed in terms of secant stiffness matrix. This formulation has been obtained by taking into account the flexibility contributions of cracks and of the concrete between adjacent cracks both in the singly and in the multi-cracked stages. The model includes all the interface phenomena generated along cracks, such as aggregate bridging and interlock, tension stiffening and dowel action. Finally, the model has been implemented into a Finite Element code and it has been validated through the comparison with significant experimental data. Full-text available at: http://www.gruppofrattura.it/ocs/index.php/ICMFF/ICMFF9/paper/download/11768/10937

Research paper thumbnail of Damage Detection on Stay Cables using an Open Source-based Framework for Finite Element Model Updating

Structural Health Monitoring, 2008

An open source software-based solution for Finite Element Model Updating is presented. The calcul... more An open source software-based solution for Finite Element Model Updating is presented. The calculation technique has been carried out by developing VCUPDATE, a Scilab (MATLAB-like software) code performing the iterative updating algorithm interfaced with OpenSees executing the Finite Element analysis. The code has been verified by many different applications on stay cables. The dynamic test results from real structures are applied if available. Otherwise, the investigated structures are numerically generated by OpenSees.

Research paper thumbnail of Damage Identification on Steel Torsional Bracings Based on Dynamic Monitoring

Structural Health Monitoring is nowadays a field of great concern due to the constant aging of in... more Structural Health Monitoring is nowadays a field of great concern due to the constant aging of infrastructures. The request of structural reliability evaluation and remaining life assessment is, therefore, assuming a major importance in order to reduce the maintenance costs and to increase the safety level of the structures. The Europabrücke is an important and well-known Austrian steel bridge located on the highway connecting Austria with Italy through the Brenner Pass and characterized by a high traffic level. In this context, the assessment of the structural conditions is a critical issue. In this contribution, the experimental and numerical investigation carried out on the torsional bracings of the Europabrücke are presented and discussed in detail.

Research paper thumbnail of The Finite Element Model Updating: A Powerful Tool for Structural Health Monitoring

Structural Engineering International, 2007

The request of non-destructive methods for evaluation of the structural reliability is nowadays c... more The request of non-destructive methods for evaluation of the structural reliability is nowadays constantly increasing. The VCUPDATE solution for finite element model updating is presented. VCUPDATE is a Scilab code performing an iterative updating algorithm interfaced with a finite element code (OpenSees or ANSYS) executing the numerical analysis. The code has been verified by many different applications on beams and stay cables. In this contribution, the code is applied to two real cases using OpenSees as well as ANSYS.

Research paper thumbnail of Automatic FE Update after Monitoring of Eigenmodes of Cables

To determine the real behavior of cables measurements can provide the necessary information. 3 ac... more To determine the real behavior of cables measurements can provide the necessary information. 3 acceleration sensors are applied to the cable in a predetermined distance. The synchronous recording gives information on the mode shapes of the cable and varying conditions. From this information not only the tension force can be extracted but also the bending stiffness and the behavior of eventual damping devices closed to the anchorages. The free length of vibration is determined as well. The results of the measurements are used to perform an automatic model update. By providing the coordinates of the 2 anchorage points a FEM model is automatically generated. The update uses the information from the measurements to determine the representative model. The free software Opensees is used.

Research paper thumbnail of A general 3D approach for the analysis of multi-axial fracture behavior of reinforced concrete elements

Engineering Fracture Mechanics, 2011

The behavior of cracked reinforced concrete structural components is here analyzed through a thre... more The behavior of cracked reinforced concrete structural components is here analyzed through a three-dimensional model, which includes all the interface phenomena generated along cracks, such as aggregate bridging and interlock, tension stiffening and dowel action, as well as the non-linear response of concrete in compression and in tension. The model is able to effectively describe the progressive development of multi-axial cracking, by considering the crack re-orientation and the change of the crack spacing as loading increases. The proposed formulation, which is expressed in terms of secant stiffness matrix, is obtained by taking into account the flexibility contributions of cracks and of the concrete between adjacent cracks, in both the singly and the multi-cracked stage. Finally, this model is implemented into a finite element code and is validated through comparisons with significant experimental data available in the literature.

Research paper thumbnail of An innovative earthquake isolation system using fibre reinforced rubber bearings

Engineering Structures, 2008

In this contribution, a new innovative isolation system for structures in earthquake regions is p... more In this contribution, a new innovative isolation system for structures in earthquake regions is presented. The system consists of high damping rubber bearings strengthened with glass fibre fabrics. A wide parametric numerical investigation through Finite Element Analysis is carried out in order to develop and verify analytical models for these new isolation devices. Experimental investigations provided useful information for numerical modelling and derivation of analytical approaches. Comparisons with simplified formulations are reported as well. In order to demonstrate the effectiveness of the proposed solution and to verify the reliability of the numerical simulations, the new devices are applied to the seismic analysis of a liquid storage tank, a strategic structure for civil protection.

Research paper thumbnail of The Finite Element Model Updating: A Powerful Tool for Structural Health Monitoring

Structural Engineering International, 2007

The request of non-destructive methods for evaluation of the structural reliability is nowadays c... more The request of non-destructive methods for evaluation of the structural reliability is nowadays constantly increasing. The VCUPDATE solution for finite element model updating is presented. VCUPDATE is a Scilab code performing an iterative updating algorithm interfaced with a finite element code (OpenSees or ANSYS) executing the numerical analysis. The code has been verified by many different applications on beams and stay cables. In this contribution, the code is applied to two real cases using OpenSees as well as ANSYS.

Research paper thumbnail of Damage Detection on Stay Cables using an Open Source-based Framework for Finite Element Model Updating

Structural Health Monitoring-an International Journal, 2008

An open source software-based solution for Finite Element Model Updating is presented. The calcul... more An open source software-based solution for Finite Element Model Updating is presented. The calculation technique has been carried out by developing VCUPDATE, a Scilab (MATLAB-like software) code performing the iterative updating algorithm interfaced with OpenSees executing the Finite Element analysis. The code has been verified by many different applications on stay cables. The dynamic test results from real structures are applied if available. Otherwise, the investigated structures are numerically generated by OpenSees.