FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2944890147> ?p ?o ?g. }

• W2944890147 abstract "Author(s): Simpson, Barbara Gwynne | Advisor(s): Mahin, Stephen A. | Abstract: Steel braced frames are characteristically efficient seismic force-resisting systems. However, multi-story steel braced frames tend to concentrate demands in one or a few stories in response to severe ground shaking. Brace buckling and yielding results in a reduction in story strength and/or stiffness. Unless a mechanism exists to re-distribute the inelastic demands to other stories, demands tend to concentrate in the story where the inelastic response was initiated, indicative of story mechanism behavior.Research has identified the advantages of using pivoting seismic force-resisting systems, herein termed strongback-braced frames, to mitigate story mechanism behavior. Strongback-braced frames employ an essentially elastic truss, or “strongback”, that provides an explicit mechanism of re-distributing demands to adjacent stories. Yielding and energy dissipation is provided through inelastic actions, or fuses (e.g., through brace yielding/buckling and/or beam plastic hinging). Forces and moments developed in these fuses are transferred vertically to adjacent stories by the flexural stiffness and strength of the strongback. As such, strongback-braced frames are expected to result in more uniform drift distributions, reduced peak inelastic demands, and improved design flexibility compared to conventional seismic force-resisting systems.Despite being employed successfully in both research and practice, systematic assessment of the strongback’s behavior and practical design methods have not been developed or validated. Since the behavior of strongback systems is not characterized by the formation of story mechanisms, prior studies have found it difficult to proportion the elastic members in the strongback truss and have recognized detailing issues related to large deformation demands induced in the fuses. As such, a series of investigations were aimed at understanding the dynamic behavior and seismic performance of steel strongback-braced frames. Archetype designs were numerically analyzed to characterize the seismic demands in the strongback elements. A four-story strongback-braced frame was used to benchmark the dynamic behavior observed during nonlinear dynamic analysis. Improved numerical models were calibrated to more realistically simulate the buckling-restrained brace response and to characterize the modeling parameters influencing brace buckling and low-cycle fatigue. The FEMA P695 methodology was used to assess potential design methods based on collapse performance. Extensive parametric studies were carried out on strongback geometries with a range of bracing configurations, ground motion characteristics, and design alternatives.Higher mode effects were identified as the cause of substantial force amplification in the elastic strongback truss. Unlike typical yielding systems where force demands are limited by the capacity of the fuses in every mode, force demands in the strongback are characterized by a yielding first-mode “pivoting” and elastic higher-mode “bending” force demands. Since the strongback is designed to remain elastic in all modes, it can exhibit significant strength and stiffness in higher mode bending. Under the second and higher modes, the strongback truss remains elastic and continues to accumulate force demands after the fuses have yielded and as the ground shaking intensifies. These force demands in the strongback members can be significantly larger than those estimated per traditional capacity design assuming first mode-only demands. The addition of a strongback results in improved dynamic response from typical yielding systems, including a more uniform drift profile compared to reference buckling-restrained braced frames. Based on this research, this study proposes recommendations for the design, analysis, and modeling of strongback-braced frames. Simplified static methods to estimate the dynamic demands in the strongback truss are also proposed, including modal pushover and modal enveloping analysis methods." @default.
• W2944890147 created "2019-05-29" @default.
• W2944890147 creator A5057802397 @default.
• W2944890147 date "2018-01-01" @default.
• W2944890147 modified "2023-09-27" @default.
• W2944890147 title "Design Development for Steel Strongback Braced Frames to Mitigate Concentrations of Damage" @default.
• W2944890147 hasPublicationYear "2018" @default.
• W2944890147 type Work @default.
• W2944890147 sameAs 2944890147 @default.
• W2944890147 citedByCount "0" @default.
• W2944890147 crossrefType "journal-article" @default.
• W2944890147 hasAuthorship W2944890147A5057802397 @default.
• W2944890147 hasConcept C105795698 @default.
• W2944890147 hasConcept C111335779 @default.
• W2944890147 hasConcept C121332964 @default.
• W2944890147 hasConcept C125800246 @default.
• W2944890147 hasConcept C126042441 @default.
• W2944890147 hasConcept C127413603 @default.
• W2944890147 hasConcept C135402231 @default.
• W2944890147 hasConcept C173534245 @default.
• W2944890147 hasConcept C2524010 @default.
• W2944890147 hasConcept C2779372316 @default.
• W2944890147 hasConcept C2779793219 @default.
• W2944890147 hasConcept C2780598303 @default.
• W2944890147 hasConcept C33923547 @default.
• W2944890147 hasConcept C41008148 @default.
• W2944890147 hasConcept C62520636 @default.
• W2944890147 hasConcept C66938386 @default.
• W2944890147 hasConcept C78519656 @default.
• W2944890147 hasConcept C85476182 @default.
• W2944890147 hasConcept C89611455 @default.
• W2944890147 hasConcept C97355855 @default.
• W2944890147 hasConceptScore W2944890147C105795698 @default.
• W2944890147 hasConceptScore W2944890147C111335779 @default.
• W2944890147 hasConceptScore W2944890147C121332964 @default.
• W2944890147 hasConceptScore W2944890147C125800246 @default.
• W2944890147 hasConceptScore W2944890147C126042441 @default.
• W2944890147 hasConceptScore W2944890147C127413603 @default.
• W2944890147 hasConceptScore W2944890147C135402231 @default.
• W2944890147 hasConceptScore W2944890147C173534245 @default.
• W2944890147 hasConceptScore W2944890147C2524010 @default.
• W2944890147 hasConceptScore W2944890147C2779372316 @default.
• W2944890147 hasConceptScore W2944890147C2779793219 @default.
• W2944890147 hasConceptScore W2944890147C2780598303 @default.
• W2944890147 hasConceptScore W2944890147C33923547 @default.
• W2944890147 hasConceptScore W2944890147C41008148 @default.
• W2944890147 hasConceptScore W2944890147C62520636 @default.
• W2944890147 hasConceptScore W2944890147C66938386 @default.
• W2944890147 hasConceptScore W2944890147C78519656 @default.
• W2944890147 hasConceptScore W2944890147C85476182 @default.
• W2944890147 hasConceptScore W2944890147C89611455 @default.
• W2944890147 hasConceptScore W2944890147C97355855 @default.
• W2944890147 hasLocation W29448901471 @default.
• W2944890147 hasOpenAccess W2944890147 @default.
• W2944890147 hasPrimaryLocation W29448901471 @default.
• W2944890147 hasRelatedWork W1513908692 @default.
• W2944890147 hasRelatedWork W1753635154 @default.
• W2944890147 hasRelatedWork W201484635 @default.
• W2944890147 hasRelatedWork W2018664951 @default.
• W2944890147 hasRelatedWork W2076109676 @default.
• W2944890147 hasRelatedWork W2217605568 @default.
• W2944890147 hasRelatedWork W2318076513 @default.
• W2944890147 hasRelatedWork W2321784440 @default.
• W2944890147 hasRelatedWork W2373364803 @default.
• W2944890147 hasRelatedWork W2492811685 @default.
• W2944890147 hasRelatedWork W2586372762 @default.
• W2944890147 hasRelatedWork W2798471733 @default.
• W2944890147 hasRelatedWork W2940677698 @default.
• W2944890147 hasRelatedWork W3087405628 @default.
• W2944890147 hasRelatedWork W3116391528 @default.
• W2944890147 hasRelatedWork W3137924049 @default.
• W2944890147 hasRelatedWork W3180708755 @default.
• W2944890147 hasRelatedWork W3201354435 @default.
• W2944890147 hasRelatedWork W38611051 @default.
• W2944890147 hasRelatedWork W843219533 @default.
• W2944890147 isParatext "false" @default.
• W2944890147 isRetracted "false" @default.
• W2944890147 magId "2944890147" @default.
• W2944890147 workType "article" @default.