Abstract
This paper presents the simple approaches to undertake reliability-based design optimization (RBDO) of bridges by integrating the first order reliability approximation and optimal algorithms of Matlab optimization toolbox. The approaches are applied to solve three RBDO problems that represent almost the practical designs of bridges. At every step of the optimal algorithm, reliability index is calculated without increasing the number of constraints to reduce the computational cost. Moreover, these approaches allow users to formulate the real RBDO problems with the separation or combination of component and system failure probabilities as well as equality and inequality probabilistic constraints. Numerical examples indicate the improvement of approaches due to lower design variables and lower cost for comparing to existing results with the same value of target reliability index. The proposed approaches are simple but efficient for solving RBDO problems to produce the better results than existing approaches and the obtained results may be closer to the exact optimization results.
| Original language | English |
|---|---|
| Pages (from-to) | 857-870 |
| Number of pages | 14 |
| Journal | Advances in Structural Engineering |
| Volume | 14 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2011 Oct 1 |
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Keywords
- concrete bridges
- probability of failure
- reliability index
- reliability-based design optimization (RBDO)
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
Cite this
Simple approaches for efficiently reliability-based design optimization of bridges. / Nguyen, Van Son; Park, Heung Min; Jeong, Min Chul; Kong, Jun g Sik.
In: Advances in Structural Engineering, Vol. 14, No. 5, 01.10.2011, p. 857-870.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simple approaches for efficiently reliability-based design optimization of bridges
AU - Nguyen, Van Son
AU - Park, Heung Min
AU - Jeong, Min Chul
AU - Kong, Jun g Sik
PY - 2011/10/1
Y1 - 2011/10/1
N2 - This paper presents the simple approaches to undertake reliability-based design optimization (RBDO) of bridges by integrating the first order reliability approximation and optimal algorithms of Matlab optimization toolbox. The approaches are applied to solve three RBDO problems that represent almost the practical designs of bridges. At every step of the optimal algorithm, reliability index is calculated without increasing the number of constraints to reduce the computational cost. Moreover, these approaches allow users to formulate the real RBDO problems with the separation or combination of component and system failure probabilities as well as equality and inequality probabilistic constraints. Numerical examples indicate the improvement of approaches due to lower design variables and lower cost for comparing to existing results with the same value of target reliability index. The proposed approaches are simple but efficient for solving RBDO problems to produce the better results than existing approaches and the obtained results may be closer to the exact optimization results.
AB - This paper presents the simple approaches to undertake reliability-based design optimization (RBDO) of bridges by integrating the first order reliability approximation and optimal algorithms of Matlab optimization toolbox. The approaches are applied to solve three RBDO problems that represent almost the practical designs of bridges. At every step of the optimal algorithm, reliability index is calculated without increasing the number of constraints to reduce the computational cost. Moreover, these approaches allow users to formulate the real RBDO problems with the separation or combination of component and system failure probabilities as well as equality and inequality probabilistic constraints. Numerical examples indicate the improvement of approaches due to lower design variables and lower cost for comparing to existing results with the same value of target reliability index. The proposed approaches are simple but efficient for solving RBDO problems to produce the better results than existing approaches and the obtained results may be closer to the exact optimization results.
KW - concrete bridges
KW - probability of failure
KW - reliability index
KW - reliability-based design optimization (RBDO)
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U2 - 10.1260/1369-4332.14.5.857
DO - 10.1260/1369-4332.14.5.857
M3 - Article
VL - 14
SP - 857
EP - 870
JO - Advances in Structural Engineering
JF - Advances in Structural Engineering
SN - 1369-4332
IS - 5
ER -