TY - GEN
A1 - Wu, Cheng-Chieh
T1 - A small-scale test bridge for measurement- and model-based structural analysis
N2 - To examine the capability to detect and localise damage using the Measurement- and Model-based Structural Analysis (MeMoS), a small-scale truss bridge (1520 mm × 720 mm × 720 mm) made of aluminium profiles is built as a test specimen for this purpose. The truss frame of the test bridge is made of aluminium profiles with a sophisticated design of the cross-sectional area. In comparison, with solid profiles, only a fraction of the material is needed to produce the profiles, while their bending resistance decreases slightly. The profiles are built into a truss frame by connecting them by means of fastening sets made of steel. The bridge model is mounted on four steel bearings which each of them consist of a cylinder arranged between two plates. Fixed bearings are made by holding onto one end of the bridge. The bridge is subjected by an external load by placing a heavy object beneath it. At the same time, measurements can be conducted below the bridge. Therefore, the bridge specimen is elevated by attaching it on a pedestal with four columns. Damages can be induced by loosening the
fastening pieces.
KW - Adjustment calculation
KW - Finite element method
KW - Damage detection and localisation
KW - Structural analysis
KW - Photogrammetry
Y1 - 2018
ER -
TY - CHAP
A1 - Wu, Cheng-Chieh
A1 - Kadoke, Daniel
A1 - Fischer, Michael
A1 - Kohlhoff, Harald
A1 - Weisbrich, S.
A1 - Neitzel, F.
ED - Pastramă, Ştefan Dan
ED - Constantinescu, Dan Mihai
T1 - A small-scale test bridge for measurement- and model-based structural analysis
T2 - 35TH DANUBIA ADRIA SYMPOSIUM ON ADVANCES IN EXPERIMENTAL MECHANICS Extended abstracts
N2 - To examine the capability to detect and localise damage using the Measurement- and Model-based Structural Analysis (MeMoS), a small-scale truss bridge (1520 mm × 720 mm × 720 mm) made of aluminium profiles is built as a test specimen for this purpose. The truss frame of the test bridge is made of aluminium profiles with a sophisticated design of the cross-sectional area. In comparison, with solid profiles, only a fraction of the material is needed to produce the profiles, while their bending resistance decreases slightly. The profiles are built into a truss frame by connecting them by means of fastening sets made of steel. The bridge model is mounted on four steel bearings which each of them consist of a cylinder arranged between two plates. Fixed bearings are made by holding onto one end of the bridge. The bridge is subjected by an external load by placing a heavy object beneath it. At the same time, measurements can be conducted below the bridge. Therefore, the bridge specimen is elevated by attaching it on a pedestal with four columns. Damages can be induced by loosening the fastening pieces.
KW - Adjustment calculation
KW - Finite element method
KW - Damage detection and localisation
KW - Structural analysis
KW - Photogrammetry
Y1 - 2018
SN - 978-606-23-0874-2
SP - 23
EP - 24
PB - PRINTECH
CY - Bukarest
ER -
TY - GEN
A1 - Wu, Cheng-Chieh
T1 - Advances in Structural Monitoring by an Integrated Analysis of Sensor Measurements and 3D Building Model
T2 - 9th International 3DGeoInfo 2014
Y1 - 2014
ER -
TY - GEN
A1 - Becker, T.
A1 - Weisbrich, S.
A1 - Wu, Cheng-Chieh
A1 - Neitzel, F.
ED - Breunig, M.
ED - Al-Doori, M.
ED - Butwilowski, E.
ED - Kuper, P.V.
ED - Benner, J.
ED - Haefele, K.H.
T1 - Advances in structural monitoring by an integrated analysis of sensor measurements and 3D building model
T2 - 3D Geoinformation science - The selected papers of the 3D GeoInfo 2014
N2 - The use of open GIS standards offers a broad variety of potential, particularly in the field of data exchange, data storage, and interoperability. GML and CityGML are excellent examples for the ontological description of real world objects by means of an open standard whereas SensorML serves to describe measurements, sensors and measuring platforms. The use of such standards offers not only the possibility of using a common standardised language, but also the use of open service standards. The combination of spatial data and sensor standards in services and service-oriented architectures goes far beyond previous existing solutions on the market and provides a novel platform for monitoring structures. That in fact is far more than a simple data storage model. The methods and models presented in this contribution allow a direct integration of sensor data and its provision through an open standard language. In this case, all the intermediate steps at any time through an open service interface are addressed and may be made available and provided to different actors and stakeholders participating in a construction scenario. The great potential and the added value of such an information system is the permanent availability of measurement and object data and an associated integrated analysis of sensor data in combination with a finite element model (FEM). The automatic derivation of a finite element model from the 3D structure model, the visualisation of FEM, the provision of raw (measurement) data and sensor information for each time of measurement transform the platform into a universal tool in the field of structural monitoring. This contribution introduces the individual components, the standards used and the interaction between the components to an overall system.
KW - Structural monitoring
KW - SensorML
KW - Finite element method
KW - Integrated analysis
KW - City model
KW - Building model
Y1 - 2015
UR - https://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=1&SID=T15HUy2zdMWxKdtryMi&page=1&doc=1
SN - 978-3-319-12180-2
SN - 978-3-319-12181-9
U6 - http://dx.doi.org/10.1007/978-3-319-12181-9_9
SN - 1863-2246
SN - 1863-2351
N1 - Serientitel: Lecture notes in geoinformation and cartography (LNG&C) – Series title: Lecture notes in geoinformation and cartography (LNG&C)
SP - 141
EP - 156
PB - Springer
ER -
TY - JOUR
A1 - Abali, B. E.
A1 - Wu, Cheng-Chieh
A1 - Müller, W.H.
T1 - An energy-based method to determine material constants in nonlinear rheology with applications
JF - Continuum mechanics and thermodynamics
N2 - Many polymer-type materials show a rate-dependent and nonlinear rheological behavior. Such a response may be modeled by using a series of spring-dashpot systems. However, in order to cover different time scales the number of systems may become unreasonably large. A more appropriate treatment based on continuum mechanics will be presented herein. This approach uses representation theorems for deriving material equations and allows for a systematic increase in modeling complexity. Moreover, we propose an approach based on energy to determine thematerial parameters.This method results in a simple linear regression problemeven for highly nonlinearmaterial equations. Therefore, the inverse problem leads to a unique solution. The significance of the proposed method is that the stored and dissipated energies necessary for the procedure are measurable quantities. We apply the proposed method to a 'semi-solid' material and measure its material parameters by using a simple-shear rheometer.
KW - Material equations
KW - Constitutive relations
KW - Nonlinear rheology
KW - Simple-shear rheometer
KW - Inverse analysis
Y1 - 2016
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=WOS:000382016900001
U6 - http://dx.doi.org/10.1007/s00161-015-0472-z
SN - 0935-1175
SN - 1432-0959
VL - 28
IS - 5
SP - 1221
EP - 1246
PB - Springer
CY - Berlin
ER -
TY - GEN
A1 - Wu, Cheng-Chieh
T1 - Approximate model for geometrical complex structures
N2 - Many engineering structures are made of composite materials or metal foam. To simulate the deformational behaviour of these structures often requires a high number of discretisation elements. This in turn yields a very large system of linear
equations that are extremely time and memory consuming or practically impossible to solve. It is therefore desirable to find an approach to overcome this obstacle.
KW - Inverse analysis
KW - Finite element method
KW - Least-squares adjustment
Y1 - 2016
ER -
TY - GEN
A1 - Wu, Cheng-Chieh
T1 - Approximate model for geometrical complex structures
N2 - Many engineering structures are made of composite materials or metal foam. To simulate the deformational behaviour of these structures often requires a high number of discretisation elements. This in turn yields a very large system of linear equations that are extremely time and memory consuming or practically impossible to solve. It is therefore desirable to find an approach to overcome this obstacle.
KW - Inverse analysis
KW - Finite element method
KW - Least-squares adjustment
Y1 - 2016
ER -
TY - CHAP
A1 - Wu, Cheng-Chieh
A1 - Weisbrich, S.
A1 - Neitzel, F.
ED - Aulova, Alexandra
ED - Rogelj Ritonja, Alenka
ED - Emri, Igor
T1 - Approximate model for geometrical complex structures
T2 - 33rd Danubia- Adria Symposium on Advances in Experimental Mechanics - BOOK OF ABSTRACTS
N2 - Many engineering structures are made of composite materials or metal foam. To simulate the deformational behaviour of these structures often requires a high number of discretisation elements. This in turn yields a very large system of linear equations that are extremely time and memory consuming or practically impossible to solve. It is therefore desirable to find an approach to overcome this obstacle.
KW - Inverse analysis
KW - Finite element method
KW - Least-squares adjustment
Y1 - 2016
SN - 978-961-94081-0-0
SP - 52
EP - 53
CY - Ljubljana
ER -
TY - JOUR
A1 - Wu, Cheng-Chieh
A1 - Weisbrich, S.
A1 - Neitzel, F.
ED - Emri, Igor
T1 - Approximate model for geometrical complex structures
JF - Materials Today: Proceedings
N2 - Many engineering structures are nowadays made of composite materials or metal foam. These modern engineering materials contain very complex inner geometry. To simulate the deformational behaviour of these structures often requires a high number of discretisation elements. This in turn yields a very large system of linear equations that are extremely time and memory consuming or practically impossible to solve. It is therefore desirable to find an approach to overcome this obstacle. In this paper a numerical method is proposed to find an approximate substitute model for geometrical complex structures.
KW - Adjustment calculation
KW - Finite element method
KW - Substitute model
KW - Complex structures
Y1 - 2017
UR - http://www.sciencedirect.com/science/article/pii/S2214785317308593
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;UT=WOS:000416470400046
U6 - http://dx.doi.org/10.1016/j.matpr.2017.06.084
SN - 2214-7853
VL - 4
IS - 5, Part 1
SP - 5995
EP - 6000
PB - Elsevier
CY - Amsterdam, Netherlands
ER -
TY - GEN
A1 - Wu, Cheng-Chieh
T1 - Determination of an approximate anisotropic model for a given geometrical complex isotropic structure by means of finite element method and least-squares adjustment
N2 - Many engineering structures are made of composite materials or metal foam. To simulate the deformational behaviour of these structures often requires a high number of discretisation elements. This in turn yields a very large system of linear equations that are extremely time and memory consuming or practically impossible to solve. It is therefore desirable to find an approach to overcome this obstacle.
KW - Least-Squares Adjustment
KW - Inverse Analysis
KW - Finite Element Method
Y1 - 2016
ER -