The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform

Gangbing Song - One of the best experts on this subject based on the ideXlab platform.

  • Progress of study on smart control for Civil Engineering Structures using piezoelectric materials
    Jianzhu Jiegou Xuebao Journal of Building Structures, 2005
    Co-Authors: Hui Li, Jing Li, Gangbing Song
    Abstract:

    In this paper, the basic features of piezoelectric materials are firstly introduced. And then the development process of vibration control of Civil Engineering Structures using piezoelectric materials is reviewed, in which the smart piezoelectric actuators and smart piezoelectric energy dissipation devices are mainly discussed in details. Finally, the promising prospects of piezoelectric materials used in Civil Engineering Structure vibration control are proposed based on the above-mentioned analyses and discussions.

P. Martínez-aguilera - One of the best experts on this subject based on the ideXlab platform.

  • A cement-based piezoelectric sensor for Civil Engineering Structure
    Materials and Structures Materiaux et Constructions, 2006
    Co-Authors: B Shen, M.j. Eneo (institution), I.e. Hernández-lópez, M.l. Zúñiga-vargas, Zili Li, Xu Yang, P. Martínez-aguilera
    Abstract:

    A new aggregate-like sensor using piezoelectric ceramic as sensing element was designed, fabricated and tested. The sensor was made by bonding together two cuboids of hardened cement paste with a commercially available piezoelectric ceramic plate in between, which is the sensing element. A new adhesive was developed during the fabrication of the sensor. The sensor was tested on its basic performance with a charge amplifier measuring system. First, the frequency response of the sensor was investigated in the general frequency range of Civil Engineering Structure, which is from 0.01 Hz to 40 Hz. Then the relationship between output and input of the sensor was tested. Finally, complex, random and square loads were applied to observe the performance of the sensors. The excellent compatibility with concrete and the good sensing performance enable the aggregate-like sensor to be easily embedded into concrete Structures like a real aggregate and to reliably monitor the vibration of host Structure. There is a good potential for such a sensor to be used in structural health monitoring.

Ludovic Resch - One of the best experts on this subject based on the ideXlab platform.

  • Full-scale industrial wood floor assembly and Structures by welded-through dowels
    Holz als Roh- und Werkstoff, 2007
    Co-Authors: Jean-françois Bocquet, A Pizzi, Ludovic Resch
    Abstract:

    High-speed dowel rotation welding was used to manufacture a full-scale raised access floor, hence an applicable Civil Engineering Structure, to demonstrate that scaling up of the welding technique is feasible. This was coupled with obtaining a more light weight floor assembly at equal stiffness by maximizing the rigidity of the suspended floor while minimizing the number of timber boards used to build it, and maintaining its vibration frequency high and its level of vibration low. Several assembly and connection combinations of two and three boards linked through welded wood dowels were tried out to determine the resistance of the cross-over joints that had to be used for building the floor. Deformation under 4 points static load of the floor was carried out to determine displacement under load and the floor vibration behaviour was determined using accelerometers. The fundamental first natural frequency measured does satisfy the requirements specified by Eurocode 5 well. Mit dem Reibschweißverfahren wurden als Beispiel für Bauteile in Gebrauchsabmessung großformatige Doppelböden hergestellt, um die praktische Anwendbarkeit des Reibschweißverfahrens nachzuweisen. Durch Maximierung der Steifigkeit des Doppelbodens bei gleichzeitiger Minimierung der verwendeten Bretter konnte bei gleicher Steifigkeit eine leichtere Konstruktion mit hoher Schwingungsfrequenz und geringem Schwingungsverhalten erreicht werden. Verschiedene Methoden zur Verbindung von zwei bzw. drei Brettern mit eingeschweißten Holzdübeln wurden untersucht, um das Festigkeitsverhalten der Knotenpunkte, wie sie zur Konstruktion der Doppelböden verwendet wurden, zu bestimmen. In einem Versuch mit statischer Belastung an vier Punkten wurde das Verformungsverhalten der Doppelböden untersucht. Das Schwingungsverhalten wurde mit Beschleunigungsmessern bestimmt. Die gemessene erste Eigenfrequenz übertraf die im Eurocode 5 aufgeführten Anforderungen.

  • Full-scale industrial wood floor assembly and Structures by welded-through dowels
    European Journal of Wood and Wood Products, 2007
    Co-Authors: Jean-françois Bocquet, Ludovic Resch
    Abstract:

    High-speed dowel rotation welding was used to manufacture a full-scale raised access floor, hence an applicable Civil Engineering Structure, to demonstrate that scaling up of the welding technique is feasible. This was coupled with obtaining a more light weight floor assembly at equal stiffness by maximizing the rigidity of the suspended floor while minimizing the number of timber boards used to build it, and maintaining its vibration frequency high and its level of vibration low. Several assembly and connection combinations of two and three boards linked through welded wood dowels were tried out to determine the resistance of the cross-over joints that had to be used for building the floor. Deformation under 4 points static load of the floor was carried out to determine displacement under load and the floor vibration behaviour was determined using accelerometers. The fundamental first natural frequency measured does satisfy the requirements specified by Eurocode 5 well.

  • full scale industrial wood floor using welded through dowels
    Journal of Adhesion Science and Technology, 2006
    Co-Authors: Jean-françois Bocquet, A Pizzi, Ludovic Resch
    Abstract:

    High-speed dowel rotation welding was used to fabricate a full-scale suspended floor, an applicable Civil-Engineering Structure, to demonstrate that scaling up of such welding technique was feasible. This was coupled with obtaining a more light-weight floor assembly with equal stiffness by maximizing the rigidity of the suspended floor while minimizing the number of timber planks used to build it, and maintaining its vibration frequency high and its level of vibration low. Several assembly and connection combinations of two and three slats linked through welded wood dowels were tried to determine the mechanical resistance of the cross-over joints that had to be used in the building of the floor. Deformation under 4-point static load of the floor was carried out to determine displacement under load and the floor vibration behaviour was determined by the use of accelerometers. The fundamental first natural frequency measured does satisfy well the requirements specified by Eurocode 5.

Hui Li - One of the best experts on this subject based on the ideXlab platform.

  • Progress of study on smart control for Civil Engineering Structures using piezoelectric materials
    Jianzhu Jiegou Xuebao Journal of Building Structures, 2005
    Co-Authors: Hui Li, Jing Li, Gangbing Song
    Abstract:

    In this paper, the basic features of piezoelectric materials are firstly introduced. And then the development process of vibration control of Civil Engineering Structures using piezoelectric materials is reviewed, in which the smart piezoelectric actuators and smart piezoelectric energy dissipation devices are mainly discussed in details. Finally, the promising prospects of piezoelectric materials used in Civil Engineering Structure vibration control are proposed based on the above-mentioned analyses and discussions.

B Shen - One of the best experts on this subject based on the ideXlab platform.

  • A cement-based piezoelectric sensor for Civil Engineering Structure
    Materials and Structures Materiaux et Constructions, 2006
    Co-Authors: B Shen, M.j. Eneo (institution), I.e. Hernández-lópez, M.l. Zúñiga-vargas, Zili Li, Xu Yang, P. Martínez-aguilera
    Abstract:

    A new aggregate-like sensor using piezoelectric ceramic as sensing element was designed, fabricated and tested. The sensor was made by bonding together two cuboids of hardened cement paste with a commercially available piezoelectric ceramic plate in between, which is the sensing element. A new adhesive was developed during the fabrication of the sensor. The sensor was tested on its basic performance with a charge amplifier measuring system. First, the frequency response of the sensor was investigated in the general frequency range of Civil Engineering Structure, which is from 0.01 Hz to 40 Hz. Then the relationship between output and input of the sensor was tested. Finally, complex, random and square loads were applied to observe the performance of the sensors. The excellent compatibility with concrete and the good sensing performance enable the aggregate-like sensor to be easily embedded into concrete Structures like a real aggregate and to reliably monitor the vibration of host Structure. There is a good potential for such a sensor to be used in structural health monitoring.