Direct‐Iterative Hybrid Solution in Nonlinear Dynamic Structural Analysis

Yang, Yuan–Sen; Wang, Weichung; Lin, Jia-Zhang

doi:10.1111/mice.12259

Cited by 8 publications

(5 citation statements)

References 44 publications

(50 reference statements)

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“…The framework is conceived for the preliminary/conceptual (retrofit) design phase; it explicitly addresses a simplicity versus accuracy trade‐off that allows analyzing many retrofit and insurance combinations with a limited modeling and computational effort. Indeed, the analysis of the seismic response (Step 1) is based on non‐linear static procedures (analytical pushover) instead of time‐history analysis or alternative statistical techniques (e.g., Luo & Paal, 2019; Perez‐Ramirez et al., 2019; Yang et al., 2017). The analytical approach “simple lateral mechanism analysis,” NZSEE, 2017; Pampanin, 2017; Gentile et al., 2019; Del Vecchio et al., 2018; Gentile et al, 2019a,b,c is used to derive the force‐displacement capacity curves.…”

Section: Methodsmentioning

confidence: 99%

A computational framework for selecting the optimal combination of seismic retrofit and insurance coverage

Gentile

Pampanin

Galasso

2021

Computer aided Civil Eng

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Economic earthquake losses can be mitigated through either building retrofit strategies and/or, to some extent, risk-transfer to the (re)insurance market. This paper proposes a computational framework to select the optimal combination of seismic retrofit and insurance policy parameters for buildings. First, a designer selects a suitable retrofit strategy. This is implemented incrementally to define interventions with increasing retrofit performance levels. The cost of each intervention is calculated, along with the cost of property rental while the retrofit is implemented. Alternative insurance options are considered. For each retrofit-insurance combination, the insured and uninsured economic losses within a given time horizon are estimated. The optimal retrofit and insurance combination minimizes the tail value at risk of the life cycle cost. The selected confidence level for this metric depends on the homeowner's risk aversion. The proposed framework is illustrated for a case-study archetype Italian reinforced concrete frame building retrofitted with concrete jacketing, also considering the Italian retrofit tax incentives/rebates called "Sismabonus."

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Section: Methodsmentioning

confidence: 99%

A computational framework for selecting the optimal combination of seismic retrofit and insurance coverage

Gentile

Pampanin

Galasso

2021

Computer aided Civil Eng

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“…( 2), k δ denotes the inaccuracy in modeling the nonlinearity after the k th iteration of the nonlinear solution, δ implies the tolerance (maximum acceptable inaccuracy in modeling the nonlinearity), and k is the maximum acceptable number of the iterations representing the available computational facility. The definition of k δ and δ can be in terms of displacement, force, energy, etc., and there are many methods for iterative nonlinear solution; see [6,25,[47][48][49][50][51][52][53][54][55][56]. It is also notable that the case k k = may be unavailable due to the divergence of the response and very large values of the response, e.g.…”

Section: The Main Conceptsmentioning

confidence: 99%

Test of an Idea for Setting the Nonlinearity Tolerance in Nonlinear Response History Analyses According to Procedures Originated in the Seismic Code of New Zealand NZS 1170.5:2004

Soroushian

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Nonlinear response history analysis using an integration scheme and an iterative nonlinear solution method is a versatile tool for analyzing structural systems subjected to earthquakes. Nevertheless, the resulting responses are inexact and the analyses are generally complicated and computationally expensive. In a recent study, a slight change is applied to the continuation/end of the nonlinear solutions' iterations and the probable stop of the analysis. As a result, the simplicity and efficiency of the analysis according to the seismic code of New Zealand NZS 1170.5:2004 is enhanced, without negative effects on the response accuracy. In this paper, in order to simplify the analysis further, and under the assumption of piecewise linear behavior, three simple suggestions for setting the nonlinearity tolerance are tested. Consequently, when the response history analysis is based on repetition of time integration analysis, as it is in the seismic code of New Zealand, NZS 1170.5:2004, the nonlinearity tolerance can be simply set and reduced with each new repetition. Such selections not only simplify the analysis by eliminating the concerns on the nonlinearity tolerance, but also may reduce the computational effort. The reduction in computational effort may be considerable specifically when the behavior is highly nonlinear. The added simplicity can increase the interest in using response history analysis in earthquake engineering practice, as well.

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“…In practice, the great majority of structures are designed based on the elastic analysis (Shan et al, 2016;Oh et al, 2017;Kim et al, 2017). During major earthquakes, however, structural members often experience nonlinear inelastic behavior (Adeli et al, 1978;Jiang and Adeli, 2005;Yang et al, 2017). To investigate nonlinear characteristics of diagrids, a static nonlinear analysis is conducted for all models according to the provisions of FEMA-356 (2000) and FEMA-440 (2005) and examples provided in FEMA P-751 (2012).…”

Section: Nonlinear Behaviormentioning

confidence: 99%

Nonlinear Behavior and Design of Mid- to High-Rise Diagrid Structures in Seismic Regions

Asadi,

Adeli

2018

Eng J

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The aesthetics and structural advantages of the diagrid structural system have made it an attractive choice for many buildings across the world, including several notable high-rise building structures built in recent years. This paper presents an investigation of nonlinear behavior and design of mid- to high-rise steel diagrid structures. Weight, story drift, fundamental period, lateral stiffness, and sequence of plastic hinge formation in steel diagrids are studied and compared with corresponding moment-resisting frames and concentrically braced frames. To improve the nonlinear behavior and increase the collapse load capacity of diagrid structures in high seismic regions, practical design guidelines are proposed by using virtual work/energy diagrams and by performing nonlinear static analysis. So far, the diagrid system has been used mostly in the design of tall buildings in the range of 20 to 100 stories. A conclusion of this research is that the diagrid system can also be an efficient and economical structural system for mid-rise buildings in the 8- to 15-story range.

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Direct‐Iterative Hybrid Solution in Nonlinear Dynamic Structural Analysis

Cited by 8 publications

References 44 publications

A computational framework for selecting the optimal combination of seismic retrofit and insurance coverage

A computational framework for selecting the optimal combination of seismic retrofit and insurance coverage

Test of an Idea for Setting the Nonlinearity Tolerance in Nonlinear Response History Analyses According to Procedures Originated in the Seismic Code of New Zealand NZS 1170.5:2004

Nonlinear Behavior and Design of Mid- to High-Rise Diagrid Structures in Seismic Regions

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