Shear Transferring Mechanisms of Existing Rc Beams With an Outside Attached Shear Strengthening Method

Kake, Satoshi; Kuramoto, Hiroshi; Castro, Juan Jose; Kagara, Masashi; Hiwatashi, Takeshi; Abe, Takahide; Kubota, Masaharu

doi:10.3130/aijs.79.113

Cited by 5 publications

(1 citation statement)

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“…Sato et al proposed simulation models and a simple design process that can reflect the reduced structural demands after upgrading and supplementation through experiments. Kake et al and Yokouchi et al explained the force transferring path between the external substructure and the existing RCF, which coincided with the test data and was successfully applied to a three‐story project.…”

Section: Introductionmentioning

confidence: 70%

Research on the seismic retrofitting performance of RC frames using SC‐PBSPC BRBF substructures

Cao

Feng

et al. 2020

Earthq Engng Struct Dyn

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A new type of external substructure to upgrade existing reinforced concrete frames (RCFs) is presented in this paper, namely, a self-centering precast bolt-connected steel-plate reinforced concrete buckling-restrained brace frame (SC-PBSPC BRBF). The upgrade mechanism and three-dimensional simulation model were analyzed based on relevant experiment validations. A quasistatic analysis and parameter study was conducted using 21 scenarios to compare the upgrading effects of the outside substructure. Afterwards, a stiffness-based design procedure was developed and modified for this external substructure, including macro-demand analysis, partial component design, and overall structural evaluations. Dynamic analyses were also performed on a frame building for five cases, before and after strengthening. The proposed numerical model reflected the precast characteristics and displayed the ideal fitting accuracy.The external assembled brace provided sufficient initial stiffness and energy dissipation capacity, while the external prestressed tendon decreased residual displacements and facilitated self-centering of the whole structure. The analyses illustrated that the damage to the existing RCF was transferred and seismic demands were significantly reduced within limitations, accompanied with greater capacity reliability. This research provides a reference for the practical applications of the external upgrading substructures in earthquake-prone areas.

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Section: Introductionmentioning

confidence: 70%