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Francesco Trentadue,Giuseppe Quaranta,Rita Greco,Giuseppe Carlo Marano 사단법인 한국계산역학회 2014 Computers and Concrete, An International Journal Vol.14 No.1
The paper is concerned with the analytical description of a resistance mechanism, not considered in previous models, by which the hoops contribute to the shear capacity of RC columns with circular cross sections. The difference from previous approaches consists in observing that, because of deformation, the hoops change their original shape and, as a consequence, their slope does not match anymore the original one in the neighborhood of a crack. The model involves two parameters only, namely the crack inclination and the hoop strain in the neighborhood of a crack. A closed-form analytical formulation to correlate the average value of the crack width and the hoop strain is also provided. Results obtained using the proposed model have been compared with experimental data, and a satisfactory agreement is found.
Stochastic optimum design criterion of added viscous dampers for buildings seismic protection
Giuseppe Carlo Marano,Francesco Trentadue,Rita Greco 국제구조공학회 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.25 No.1
In this study a stochastic approach for linear viscous dampers design adopted for seismic protection of buildings is developed. Devices optimal placement into the main structure and their mechanical parameters are attained by means of a reliability-based optimum design criterion, in which an objective function (O.F.) is minimized, subject to a stochastic constraint. The seismic input is modelled by a non stationary modulated Kanai Tajimi filtered stochastic process. Building is represented by means of a plane shear type frame model. The selected criterion for the optimization searches the minimum of the O.F., here assumed to be the cost of the seismic protection, i.e., assumed proportional to the sum of added dampings of each device. The stochastic constraint limits a suitable approximated measure of the structure failure probability, here associated to the maximum interstorey drift crossing over a given threshold limit, related, according with modern Technical Codes, to the required damage control.
Stochastic optimum design criterion of added viscous dampers for buildings seismic protection
Marano, Giuseppe Carlo,Trentadue, Francesco,Greco, Rita Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.25 No.1
In this study a stochastic approach for linear viscous dampers design adopted for seismic protection of buildings is developed. Devices optimal placement into the main structure and their mechanical parameters are attained by means of a reliability-based optimum design criterion, in which an objective function (O.F.) is minimized, subject to a stochastic constraint. The seismic input is modelled by a non stationary modulated Kanai Tajimi filtered stochastic process. Building is represented by means of a plane shear type frame model. The selected criterion for the optimization searches the minimum of the O.F., here assumed to be the cost of the seismic protection, i.e., assumed proportional to the sum of added dampings of each device. The stochastic constraint limits a suitable approximated measure of the structure failure probability, here associated to the maximum interstorey drift crossing over a given threshold limit, related, according with modern Technical Codes, to the required damage control.
Biased hooking for primitive chain network simulations of block copolymers
Masubuchi Yuichi,Ianniruberto Giovanni,Marrucci Giuseppe,Greco Francesco The Korean Society of Rheology 2006 Korea-Australia rheology journal Vol.18 No.2
Primitive chain network model for block copolymers is used here to simulate molecular dynamics in the entangled state with acceptable computational cost. It was found that i) the hooking procedure rearranging the topology of the entangled network is critical for the equilibrium structure of the system, and ii) simulations accounting for the different chemistry, i.e., with a biased hooking probability based on interaction parameter ${\chi}$ for selection of the hooked partner, generates a reasonable phase diagram.
Biased hooking for primitive chain network simulations of block copolymers
Yuichi Masubuchi,Giovanni Ianniruberto,Giuseppe Marrucci,Francesco Greco 한국유변학회 2006 Korea-Australia rheology journal Vol.18 No.2
Primitive chain network model for block copolymers is used here to simulate molecular dynamics in the entangled state with acceptable computational cost. It was found that i) the hooking procedure rearranging the topology of the entangled network is critical for the equilibrium structure of the system, and ii) simulations accounting for the different chemistry, i.e., with a biased hooking probability based on interaction parameter c for selection of the hooked partner, generates a reasonable phase diagram.