Álvaro Magdaleno

University of Valladolid | UVA · Instituto de las Tecnologias Avanzadas de la Producción

Preserved listed building facades may require large-scale and highly technical work when the supporting building structure is at serious risk of collapse. Such is the case described in this paper, where vast facades must be cut into large panels up to 200 m2 and 150 t in weight and carefully laid on the ground. Various engineering works must be car...

Human-induced force analysis plays an important role across a wide range of disciplines, including biomechanics, sport engineering, health monitoring or structural engineering. Specifically, this paper focuses on the replication of ground reaction forces (GRF) generated by humans during movement. They can provide critical information about human-me...

This work is devoted to design, implement and validate an active mass damper (AMD) for vibration mitigation in slender structures. The control law, defined by means of genetic algorithm optimization, is deployed on a low-cost processor (NI myRIO-1900), and experimentally validated on a 13.5-m lively timber footbridge. As is known, problems arising...

An iterative neural network framework is proposed in this paper for the human-induced Ground Reaction Forces (GRF) replication with an inertial electrodynamic mass actuator (APS 400). This is a first approach to the systematization of dynamic load tests on structures in a purely objective, repeatable and pedestrian-independent basis. Therefore, an...

This work proposes a novel approach to implement semi-active control laws in electric motors. The work proposes how to include the model of a real lineal electric motor in a tuned mass damper (TMD). The force generated by the motor depends of a semi-active control law, which is configured as the control laws published in [1]. Figure 1 shows a simpl...

A Tuned Mass Damper (TMD) is a device that is installed on a structure in order to reduce its response level when it is subjected to dynamic loads [1,2]. It can be assimilated to a single-degree-of-freedom (SDOF) system, as shown in Figure 1, with its own values for the moving mass, stiffness constant and damping coefficient, which confers them a c...

This manual is an introduction to the numerical technique of the Finite Element Method (FEM). It briefly presents the matrix formulation and general equations of the method, which is applied to the basic topics of: trusses, frames, 2D and 3D solids, and thin plates. The manual includes the basic theory and examples solved with the Mathematica and A...

p>This paper shows the methodology used for the dynamic identification and serviceability assessment carried out on a timber pedestrian walkway located in the Anillo Verde trail, upon the N‐102 road, between Zabalgana and Armentia, Vitoria, Spain. The footbridge is 61 meters long and 3 meters wide and consists of curved glulam structural beams, woo...

One of the most popular options in the Structural Health Monitoring field is the tracking of the modal parameters, which are estimated through the frequency response functions of the structure, usually in the form of accelerances, which are computed as the ratio between the measured accelerations and the applied forces. This requires the use of dev...

The purpose of this work is the design and implementation of an active mass damper (AMD) for vibration mitigation in slender structures using a standard actuator (APS 400) commanded by a low-cost processor (NI myRIO-1900). The control law is experimentally validated on a 13.5-meter lively footbridge and has been formulated assuming a reduced mechan...

This work is devoted to presenting and applying a novel methodology that estimates a linear physical model, represented by full-rank mass, stiffness and damping matrices, capable of replicating the dynamic behaviour of an incomplete modal model. No hypothesis is made with respect to the damping matrix, so the procedure is applicable assuming any li...

Tuned Mass Dampers are devices which can be assimilated to single-degree-of-freedom systems with a certain amount of moving mass, a natural frequency and a damping ratio intended to be installed on lively structures to reduce the contribution of a certain mode to their response. Once placed on the structure, the movement of the mass damper couples...

This paper presents a common framework for designing tune mass dampers (TMD) and active mass dampers (AMD) to control the vibrations of shear buildings. This common framework is used for tuning the parameters of TMD and AMD devices in order to achieve a particular control objective. Thus, TMD and AMD can be better compared in practical applications...

This paper presents the design, development and testing of a low-cost Structural Health Monitoring (SHM) system based on MEMS (Micro Electro-Mechanical Systems) triaxial accelerometers. A new control system composed by a myRIO platform, managed by specific LabVIEW software, has been developed. The LabVIEW software also computes the frequency respon...

The present paper studies the performance of a tuned mass damper (TMD) installed in a 183 m tall chimney located at the edge of the wake shed by another chimney. Numerical and experimental results are available. For the simulations, wind action is considered by solving several 2D flow problems on a selected number of horizontal planes, in the trans...

Tuned Mass Dampers (TMDs) are devices used to mitigate vibration in slender structures. During the last few decades, the improvement of design and building techniques has led to deep research on these devices and their interaction with the structure on which they are installed. Their optimal properties have also been thoroughly investigated conside...

This paper presents a comparative study including the theoretical modelling and the practical implementation of two types of well-known devices for structural vibration control. Firstly, a lab scale model for a two-storey building is dynamically identified. Then, a tuned mass damper (TMD) and an active mass damper (AMD) are described, modelled and...

Pedro Gómez Bosque footbridge is a slender and lightweight structure that creates a pedestrian link over the Pisuerga River, Valladolid, Spain. This footbridge is a singular stress ribbon structure with one span of 85 m consisting on a steel plate and precast concrete slabs laying on it. Rubber pavement and a railing made of stainless steel and gla...

Structures subjected to excitations like human induced vibrations may produce large accelerations and serviceability limit state problems. Passive, semi-active and active vibration controls have been proposed as possible solutions to reduce the vibration level at civil structures such as bridges, multi-storey buildings or slender floor structures,...

Structures subjected to excitations like human induced vibrations may produce large accelerations and serviceability limit state problems. Passive, semi-active and active vibration controls have been proposed as possible solutions to reduce the vibration level at civil structures such as bridges, multi-storey buildings or slender floor structures,...

Lively structures subjected to excitations such as wind, earthquake or human-induced forces can undergo relevant stresses and accelerations that can compromise some limit state criteria. Passive, semi-active and active vibration control devices have been proposed as possible solutions to reduce the level of vibration in civil structures such as bri...

There is an increasing interest in the field of modal testing in civil engineering to apply measured forces in addition to the unmeasured ambient excitation, and to identify a model that accounts for both excitation sources. In these tests the amplitude of the artificial forces can be small compared to the amplitude of the ambient forces, so small...

In this paper we tackle a problem of optimal design and location of Tuned Mass Dampers (TMDs) for structures subjected to earthquake ground motions, using a novel meta-heuristic algorithm. Specifically, the Coral Reefs Optimization (CRO) with Substrate Layer (CRO-SL) is proposed as a competitive co-evolution algorithm with different exploration pro...