A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling
https://orcid.org/0000-0002-9036-1912
Abstract The recent large interest in nonlinear seismic analysis methods, static and dynamic, has required proper strategies of modeling based on reliable, and at the same time easy to use, constitutive laws for the structural elements. Regarding the behavior of framed structures, special attention has to be devoted to infills because of the key role they play in modifying overall stiffness, strength and ductility under seismic excitation. Pointing out the attention on this topic the paper discusses a criteria for modeling the structural behavior of infills based on a macromodeling approach, that is to say on the substitution of infills with diagonal pin jointed struts. Is here shown how multilinear plastic link elements governed by a hysteretic Pivot model, available in different FEM codes, can be appropriately used to model the equivalent struts to perform linear or nonlinear analyses. In order to enlarge experimental knowledge on cyclic behavior of infilled frames structures and as reference for developing the above mentioned modeling strategy, an experimental campaign on single-storey, single-bay, fully infilled frames with different kinds of masonry and subjected to lateral cyclical loads, was carried out, and some others available in the literature are referred to. Validation of Pivot modeling approach was carried out comparing experimental results and computer simulations of the experimental tests. In the paper hysteresis parameters values calibrating Pivot law are also given for involved masonry infills typologies and some proposals for correlation between strength and stiffness of infilled frames and of masonry infills are provided as a tool for the quick calibration of the Pivot model in practical applications.
Highlights An experimental campaign on the cyclic response of RC masonry infilled frames was carried out. An adaptation of the Pivot hysteretic model for the prediction of cyclic response was proposed. Identification of best governing parameters was provided for 3 different kinds of masonry. Validation tests show a good reliability in terms of strength, stiffness and energy dissipation. The application of the proposed model is suggested to perform nonlinear TH analyses.
Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling
https://orcid.org/0000-0002-9036-1912
Abstract The recent large interest in nonlinear seismic analysis methods, static and dynamic, has required proper strategies of modeling based on reliable, and at the same time easy to use, constitutive laws for the structural elements. Regarding the behavior of framed structures, special attention has to be devoted to infills because of the key role they play in modifying overall stiffness, strength and ductility under seismic excitation. Pointing out the attention on this topic the paper discusses a criteria for modeling the structural behavior of infills based on a macromodeling approach, that is to say on the substitution of infills with diagonal pin jointed struts. Is here shown how multilinear plastic link elements governed by a hysteretic Pivot model, available in different FEM codes, can be appropriately used to model the equivalent struts to perform linear or nonlinear analyses. In order to enlarge experimental knowledge on cyclic behavior of infilled frames structures and as reference for developing the above mentioned modeling strategy, an experimental campaign on single-storey, single-bay, fully infilled frames with different kinds of masonry and subjected to lateral cyclical loads, was carried out, and some others available in the literature are referred to. Validation of Pivot modeling approach was carried out comparing experimental results and computer simulations of the experimental tests. In the paper hysteresis parameters values calibrating Pivot law are also given for involved masonry infills typologies and some proposals for correlation between strength and stiffness of infilled frames and of masonry infills are provided as a tool for the quick calibration of the Pivot model in practical applications.
Highlights An experimental campaign on the cyclic response of RC masonry infilled frames was carried out. An adaptation of the Pivot hysteretic model for the prediction of cyclic response was proposed. Identification of best governing parameters was provided for 3 different kinds of masonry. Validation tests show a good reliability in terms of strength, stiffness and energy dissipation. The application of the proposed model is suggested to perform nonlinear TH analyses.
Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling
https://orcid.org/0000-0002-9036-1912
Abstract The recent large interest in nonlinear seismic analysis methods, static and dynamic, has required proper strategies of modeling based on reliable, and at the same time easy to use, constitutive laws for the structural elements. Regarding the behavior of framed structures, special attention has to be devoted to infills because of the key role they play in modifying overall stiffness, strength and ductility under seismic excitation. Pointing out the attention on this topic the paper discusses a criteria for modeling the structural behavior of infills based on a macromodeling approach, that is to say on the substitution of infills with diagonal pin jointed struts. Is here shown how multilinear plastic link elements governed by a hysteretic Pivot model, available in different FEM codes, can be appropriately used to model the equivalent struts to perform linear or nonlinear analyses. In order to enlarge experimental knowledge on cyclic behavior of infilled frames structures and as reference for developing the above mentioned modeling strategy, an experimental campaign on single-storey, single-bay, fully infilled frames with different kinds of masonry and subjected to lateral cyclical loads, was carried out, and some others available in the literature are referred to. Validation of Pivot modeling approach was carried out comparing experimental results and computer simulations of the experimental tests. In the paper hysteresis parameters values calibrating Pivot law are also given for involved masonry infills typologies and some proposals for correlation between strength and stiffness of infilled frames and of masonry infills are provided as a tool for the quick calibration of the Pivot model in practical applications.
Highlights An experimental campaign on the cyclic response of RC masonry infilled frames was carried out. An adaptation of the Pivot hysteretic model for the prediction of cyclic response was proposed. Identification of best governing parameters was provided for 3 different kinds of masonry. Validation tests show a good reliability in terms of strength, stiffness and energy dissipation. The application of the proposed model is suggested to perform nonlinear TH analyses.
Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling
Cavaleri, Liborio (author) / Di Trapani, Fabio (author)
Soil Dynamics and Earthquake Engineering ; 65 ; 224-242
2014-06-07
19 pages
Article (Journal)
Electronic Resource
English
Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling
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