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sensitivity analysis 2

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calculation 1

cubic B-splines 1

diameter 1

engineering 1

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optimum design 1

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reliability-based design optimization 1

response surface method 1

shifting technique 1

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Strength of tubular welded joints of roof trusses in Shanghai Qizhong Tennis Center

TONG Lewei, GU Min, CHEN Yiyi, ZHOU Liying, SUN Jiandong, CHEN Yangji, LIN Yingru, LIN Gao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1,   Pages 30-36 doi: 10.1007/s11709-008-0010-1

Abstract: circular hollow sections is investigated in the paper, based on the engineering practice of moveable roof trusses

Keywords: diameter     numerical analysis     calculation     thickness     engineering    

Border-search and jump reduction method for size optimization of spatial truss structures

Babak DIZANGIAN, Mohammad Reza GHASEMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 123-134 doi: 10.1007/s11709-018-0478-2

Abstract: proposes a sensitivity-based border-search and jump reduction method for optimum design of spatial trusses

Keywords: optimum design     sensitivity analysis     reduction method     spatial trusses     OpenSees    

Novel decoupled framework for reliability-based design optimization of structures using a robust shifting technique

Mohammad Reza GHASEMI, Charles V. CAMP, Babak DIZANGIAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 800-820 doi: 10.1007/s11709-019-0517-7

Abstract: In a reliability-based design optimization (RBDO), computation of the failure probability ( ) at all design points through the process may suitably be avoided at the early stages. Thus, to reduce extensive computations of RBDO, one could decouple the optimization and reliability analysis. The present work proposes a new methodology for such a decoupled approach that separates optimization and reliability analysis into two procedures which significantly improve the computational efficiency of the RBDO. This technique is based on the probabilistic sensitivity approach (PSA) on the shifted probability density function. Stochastic variables are separated into two groups of desired and non-desired variables. The three-phase procedure may be summarized as: Phase 1, apply deterministic design optimization based on mean values of random variables; Phase 2, move designs toward a reliable space using PSA and finding a primary reliable optimum point; Phase 3, applying an intelligent self-adaptive procedure based on cubic B-spline interpolation functions until the targeted failure probability is reached. An improved response surface method is used for computation of failure probability. The proposed RBDO approach could significantly reduce the number of analyses required to less than 10% of conventional methods. The computational efficacy of this approach is demonstrated by solving four benchmark truss design problems published in the structural optimization literature.

Keywords: reliability-based design optimization     trusses     sensitivity analysis     shifting technique     cubic B-splines    

Title Author Date Type Operation

Strength of tubular welded joints of roof trusses in Shanghai Qizhong Tennis Center

TONG Lewei, GU Min, CHEN Yiyi, ZHOU Liying, SUN Jiandong, CHEN Yangji, LIN Yingru, LIN Gao

Journal Article

Border-search and jump reduction method for size optimization of spatial truss structures

Babak DIZANGIAN, Mohammad Reza GHASEMI

Journal Article

Novel decoupled framework for reliability-based design optimization of structures using a robust shifting technique

Mohammad Reza GHASEMI, Charles V. CAMP, Babak DIZANGIAN

Journal Article