000009360 001__ 9360
000009360 005__ 20141205150158.0
000009360 04107 $$aeng
000009360 046__ $$k2008-10-12
000009360 100__ $$aAkguzel, Umut
000009360 24500 $$aEffects of Variation of Axial Load and Bi-Directional Loading on the FRP Retrofit of Existing B-C Joints

000009360 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009360 260__ $$b
000009360 506__ $$arestricted
000009360 520__ $$2eng$$aMost of the experimental studies on the seismic assessment and retrofit of existing, poorly detailed, beam-column joints have typically concentrated on the 2-dimensional (2D) response, based on uni-directional cyclic loading testing protocol under constant axial load. However, in order to obtain a more realistic understanding of the behavior of deficient exterior beam-column joints prior and after retrofit intervention, consideration of the 3-dimensional (3D) response under a) bi-directional and b) varying axial loads are necessary. In this contribution, these two effects on the assessment and retrofit of exterior beam-column joints using GFRP composite materials are discussed. A series of 2/3 scale, 2D and 3D exterior (corner) beam-column joint subassemblies representative of pre-1970s construction practice were tested quasi-statically. Performance-based retrofit approach has been adopted in order to achieve the desired ductile failure mode by modifying the hierarchy of strength within the beam-column joint system. A critical comparison of the existing and retrofitted joints with regard to the observed damage and the global hysteresis behavior are shown, emphasizing the effects of axial load variation and bi-directional loading. The experimental results provided satisfactory confirmations of the efficiency of the proposed retrofit solution, aimed at protecting the panel zone region, while activating a flexural behavior in the beam in order to achieve a more desired weak beam-strong column global inelastic mechanism.

000009360 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009360 653__ $$aReinforced Concrete, Rehabilitation, Fiber reinforced polymers, Biaxial tests

000009360 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009360 720__ $$aAkguzel, Umut$$iPampanin, Stefano
000009360 8560_ $$ffischerc@itam.cas.cz
000009360 8564_ $$s2412609$$uhttps://invenio.itam.cas.cz/record/9360/files/12-01-0056.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 12-01-0056.
000009360 962__ $$r9324
000009360 980__ $$aPAPER