Concurrent multi-scale modeling of civil infrastructures for analyses on structural deteriorating—Part II: Model updating and verification

Chan, Tommy H.T.; Li, Z. X.; Yu, Ying; Sun, Zhen

doi:10.1016/j.finel.2009.06.008

Cited by 33 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The application of St-Id was first in earthquake engineering to identify the dynamic characteristics of civil structures such as buildings, dams and nuclear facilities [4][5][6]. With the advancement in computer, sensor and testing technologies, during the last two decades, civil engineering researchers became interested in utilising vibration based St-Id for condition assessment and health monitoring of real constructed systems [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Toward effective structural identification of medium-rise building structures

Nguyễn

Kodikara

Thambiratnam

2017

J Civil Struct Health Monit

View full text Add to dashboard Cite

Structural Identification (St-Id) is the process of constructing and calibrating a physics-based model based on the measured static and/or dynamic response of the structure. Over the last two decades, although the St-Id methods have become increasingly popular amongst civilstructural engineering communities, most complete and successful applications are often found with flexible structures such as long-span bridges and towers. Very few comprehensive studies were reported on building structures, especially those with medium-rise characteristics which are often associated with complicated analytical modelling and different degrees of parameter uncertainties. To address this need, this paper presents an in-depth study on St-Id of a benchmark medium-rise building firstly demonstrating the importance of developing appropriate initial analytical models that can be used for the automated model calibration techniques. Then, a novel parametric study based sensitivity analysis approach is introduced to identify tuning parameters as well as their appropriate ranges to maximise the correlation of the calibrated model whilst preserving the physical relevance of the calibrated model. Modal data of the first few modes measured under ambient vibration conditions are used in this study.

show abstract

Section: Introductionmentioning

confidence: 99%

Toward effective structural identification of medium-rise building structures

Nguyễn

Kodikara

Thambiratnam

2017

J Civil Struct Health Monit

View full text Add to dashboard Cite

show abstract

“…Wang [18] investigated the failure of a multispan simply supported girder bridge subjected to pounding and sliding under severe ground motion by numerical simulation. Chan et al [19] studied the nonlinear physics-based modeling to simulate the dynamic characteristics and static response of civil infrastructure. Li et al [20] proposed erosion criterion of multiscale FE model and numerical simulations of continuous RC bridge were conducted to study failure process under strong earthquake.…”

Section: Introductionmentioning

confidence: 99%

Seismic Collapse Analysis of RC Highway Bridges Based on a Simplified Multiscale FE Modeling Approach

Han

et al. 2017

Shock and Vibration

View full text Add to dashboard Cite

Multiscale finite element (FE) modeling offers a balance between computational efficiency and accuracy in numerical simulations, which is appropriate for analysis of seismic collapse of RC highway bridges. Some parts of structures that need detailed analysis can be modeled by solid elements, while some subordinate parts can be simulated by beam elements or shell elements to increase the computational efficiency. In the present study, rigid surface coupling method was developed to couple beam elements with solid elements using the LS-DYNA software. The effectiveness of this method was verified by performing simulation experiments of both a single-column pier and a two-span simply supported beam bridge. Using simplified multiscale FE modeling, analyses of collapse and local failure of a multispan simply supported beam bridge and a continuous rigid frame bridge were conducted to illustrate the approach in this paper. The results demonstrate that the simplified multiscale model reasonably simulates the collapse process and local damage of complex bridges under seismic loading.

show abstract

“…The multi‐scale simulation can simultaneously capture not only the global structural behavior in terms of displacement and acceleration but also the local joint behavior in terms of stress and strain. Li and Chan et al performed the concurrent multi‐scale modeling of long‐span bridges by coupling beam and shell elements. Wang et al proposed a multi‐objective optimization technique for multi‐scale model updating by using natural frequencies, modal shapes, deflection, and strains.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale model updating of a transmission tower structure using Kriging meta-method

Wang

2016

Struct. Control Health Monit.

View full text Add to dashboard Cite

A multi-scale model is often constructed using different finite elements and consists of a global scale model for the structural system and a few local scale models for critical structural components so that the multi-scale simulation can concurrently exhibit both global performance and local behavior of the structure. To ensure the multi-scale model can best represent the real structure, multi-scale model updating technique shall be developed accordingly. This paper thus presents a multi-scale model updating method for a transmission tower structure using the Kriging metamodel that actually is a surrogate for the multi-scale model. Firstly, the multi-scale model of a transmission tower is established by using beam elements to simulate global structure and solid elements to simulate local joints with bolt connections. Secondly, the multi-objective optimization problem that involves multiple objective functions is established to update key parameters of the multi-scale model so that the errors between the measured and predicted structural dynamic characteristics and multi-scale responses can be minimized. To improve the computational efficiency and accuracy of optimization, the Kriging meta-method is used to find the updated key parameters of the tower after a comparison with other meta-methods is made. Finally, the proposed method is applied to a physical transmission tower model, which has been tested in a laboratory, to demonstrate the feasibility and accuracy of the proposed model-updating method. The updated results show that the proposed updating method can improve the accuracy of the multi-scale model of the tower in both global and local structural responses.

show abstract

Concurrent multi-scale modeling of civil infrastructures for analyses on structural deteriorating—Part II: Model updating and verification

Cited by 33 publications

References 9 publications

Toward effective structural identification of medium-rise building structures

Toward effective structural identification of medium-rise building structures

Seismic Collapse Analysis of RC Highway Bridges Based on a Simplified Multiscale FE Modeling Approach

Multi-scale model updating of a transmission tower structure using Kriging meta-method

Contact Info

Product

Resources

About