TY - JOUR
T1 - Use of FRF for RC frames in seismic zones
T2 - Part I. Evaluation of FRP beam-column joint rehabilitation techniques
AU - Said, A. M.
AU - Nehdi, M. L.
N1 - Funding Information:
To address port safety, the authors propose innovative modeling & simulation solutions, capable of predicting outcome of different scenarios in various initial conditions. The idea is framed within an international project named ALACRES2 (Advanced Simulation Based Lab for Port Crisis and Emergency Management over Tyrrhenian Sea Area) carried out among different Universities and Institutions that foresees identification of scenarios of interest for port safety and their application to several ports of interest in order to create a virtual lab able to support definition of policies and guidelines as well as to turn into an efficient modern training equipment for managers, decision makers and operators (Bruzzone et al. 2010; Massei et al. 2011). ALACRES is lead by Genoa University and it involves currently Cagliari and Pisa University, Italian Coast Guard, Chamber of Commerce of Var and of Bastia Haute Corse, Cagliari Fire Fighting Department and Liguria Environmental Agency Indeed this consortium is sponsored by EU funds for regional development in order to develop a solution that could have a great impact in this sector. In facts, the Simulation makes possible to reproduce complex crisis evolution and impact on structures, systems, people and goods considering both the physical aspects and the domino effect. Furthermore, it is possible to test the effectiveness of new technological and infrastructural solutions to reduce vulnerability, mitigate damage and prevent emergencies. The simulation techniques adopt the new MS2G paradigm (Modeling, interoperable Simulation and Serious Games) to combine different models and guarantee a high level of fidelity and at the same time simplicity of use, intuitiveness and immersiveness of these simulations, that can even be distributed. In this way it becomes possible to recreate the emergency scenario using immersive virtual reality technologies, thus allowing the involved operators to take actions and simulate their work performance within scenarios that possibly reproduce, from the visual point of view and sound, the real emergency conditions and that guarantee to be involved in the crisis. ALACRES2 expects to involve both the technical partners to build the environments in virtual reality and to set up the laboratory tools, and the operational partners, in charge for the development of the emergency procedures and for the tests.
Funding Information:
The presented research is carried out under the EU research funding program Italy – France INTERREG Maritime14-20 (http://interreg-maritime.eu/) which supports the development of the project named ALACRES2.
PY - 2004/7
Y1 - 2004/7
N2 - Multi-storey reinforced concrete frames that were built prior to the 1970's generally do not meet current seismic design code requirements. The lateral load carrying capacity of these structures is often insufficient due to non-ductile reinforcement detailing, which includes either insufficient or no beam-column joint transverse reinforcement. It was observed during recent earthquakes that deficient beam-column joints can jeopardise the integrity of entire structures. Thus, several beam-column joint rehabilitation techniques have emerged to upgrade such substandard joints. It is essential to evaluate the standings of joints rehabilitated with such techniques based on current design code requirements. This paper critically examines beam-column joint rehabilitation techniques using FRP that emerged in the last decade. For this purpose, a full-scale code-conforming beam-column joint was made and tested under reversed cyclic load to serve as a benchmark for this comparison. Enhancements imparted to substandard beam-column joints by FRP rehabilitation techniques in terms of strength, ductility and energy dissipation gains are assessed. It is shown that FRP joints repair schemes generally enhanced the performance of substandard joints, but they often came short of satisfying current standard level performance, and that different rehabilitation strategies can be adopted depending on the type of joint deficiency and the purpose of the rehabilitation scheme.
AB - Multi-storey reinforced concrete frames that were built prior to the 1970's generally do not meet current seismic design code requirements. The lateral load carrying capacity of these structures is often insufficient due to non-ductile reinforcement detailing, which includes either insufficient or no beam-column joint transverse reinforcement. It was observed during recent earthquakes that deficient beam-column joints can jeopardise the integrity of entire structures. Thus, several beam-column joint rehabilitation techniques have emerged to upgrade such substandard joints. It is essential to evaluate the standings of joints rehabilitated with such techniques based on current design code requirements. This paper critically examines beam-column joint rehabilitation techniques using FRP that emerged in the last decade. For this purpose, a full-scale code-conforming beam-column joint was made and tested under reversed cyclic load to serve as a benchmark for this comparison. Enhancements imparted to substandard beam-column joints by FRP rehabilitation techniques in terms of strength, ductility and energy dissipation gains are assessed. It is shown that FRP joints repair schemes generally enhanced the performance of substandard joints, but they often came short of satisfying current standard level performance, and that different rehabilitation strategies can be adopted depending on the type of joint deficiency and the purpose of the rehabilitation scheme.
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U2 - 10.1023/B:ACMA.0000035462.41572.7a
DO - 10.1023/B:ACMA.0000035462.41572.7a
M3 - Article
AN - SCOPUS:3242772914
SN - 0929-189X
VL - 11
SP - 205
EP - 226
JO - Applied Composite Materials
JF - Applied Composite Materials
IS - 4
ER -