It is widely acknowledged that masonry walls in RC （reinforced concrete） frame structures, although often omitted in the design process, contribute significantly on the seismic resistance of buildings. Their contrib...It is widely acknowledged that masonry walls in RC （reinforced concrete） frame structures, although often omitted in the design process, contribute significantly on the seismic resistance of buildings. Their contribution toward seismic response improvement is proportional to their participation level on buildings. The more abundant they are on buildings, their lateral strength contribution gets more significant, especially for ＂frame systems＂ of both RC and steel structures. This paper presents an ＂innovative＂ solution which aims to provide a seismic protection to masonry walls and to improve the seismic performance of the entire building structure. These goals are achieved through use of so called ＂IDRIZI＂ seismic devices. These ＂box-like＂ devices are placed at characteristic locations between the masonry infill walls and the structural frame system of the building. They act as special link elements between the top of wall panels and the bottom of beams and/or slabs. The assemblage of a wall panel, IDRIZI seismic devices and other boundary structural elements forms an integral structural system that is shortly called ＂IDRIZI＂ wall system. In addition, as part of this paper is shown selected experimental investigations, which demonstrate that under ＂optimal design＂ of buildings integrated with IDRIZI wall system, up to 80% of earthquake energy input in the structure can be dissipated by the friction mechanism of the IDRIZI devices. This feature provides remarkable improvements on the seismic performance of residential buildings or any other type of building where masonry walls are abundantly present.展开更多
Perhaps the best way to demonstrate the gained improvements in seismic performance of buildings, integrated with IDRIZI infill walls, is to analyse typical building structures subjected to real case earthquake scenari...Perhaps the best way to demonstrate the gained improvements in seismic performance of buildings, integrated with IDRIZI infill walls, is to analyse typical building structures subjected to real case earthquake scenarios. This paper presents obtained analytical results for a characteristic 2D frame structure which （besides the self-weight, superimposed dead loads and live loads） is subjected to real earthquake ground motions. This study case treats three story planar RC （reinforced concrete） frame opened on the ground story while its upper stories are infilled with classical masonry walls. The purpose of this study case is to demonstrate ＂quantitatively＂ the seismic performance of this frame structure and, more importantly, to estimate the level of seismic response improvements of the frame when at its ground story is utilized IDRIZI infill wall with door opening. The seismic action considered for this study case is a representation of the 1979 Tivari earthquake, Montenegro. Ultimately, this study demonstrates the remarkable benefits the structure gains （in terms of seismic performance and safety） by the use of IDRIZI wall system as a constitutive part of the 2D frame structure.展开更多
As capacity design philosophy suggests, the best way to achieve a safe seismic response of multistory buildings, under strong earthquakes, is to uniformly spread the inelastic deformation demands throughout the buildi...As capacity design philosophy suggests, the best way to achieve a safe seismic response of multistory buildings, under strong earthquakes, is to uniformly spread the inelastic deformation demands throughout the building structure. Unfortunately, this type of mechanism is difficult to be reached due to the abundant presence ofinfill wall panels on buildings, which under strong earthquakes show severe cracks and strength degradations, thus complicating the seismic response of buildings. In order to avoid these brittle mechanisms of failure, studies were made toward development of new seismic protection system which would completely protect the infill walls from any cracks and strength degradation manifestations and simultaneously improve the seismic response of the entire structure. Utilization of the ＂IDRIZI＂ seismic protection system, would greatly contribute to many important aspects, like the increase of structural seismic performance, drastic reduction of damages under strong earthquake events and avoiding any unpredictable local failure mechanisms on buildings.展开更多
文摘It is widely acknowledged that masonry walls in RC （reinforced concrete） frame structures, although often omitted in the design process, contribute significantly on the seismic resistance of buildings. Their contribution toward seismic response improvement is proportional to their participation level on buildings. The more abundant they are on buildings, their lateral strength contribution gets more significant, especially for ＂frame systems＂ of both RC and steel structures. This paper presents an ＂innovative＂ solution which aims to provide a seismic protection to masonry walls and to improve the seismic performance of the entire building structure. These goals are achieved through use of so called ＂IDRIZI＂ seismic devices. These ＂box-like＂ devices are placed at characteristic locations between the masonry infill walls and the structural frame system of the building. They act as special link elements between the top of wall panels and the bottom of beams and/or slabs. The assemblage of a wall panel, IDRIZI seismic devices and other boundary structural elements forms an integral structural system that is shortly called ＂IDRIZI＂ wall system. In addition, as part of this paper is shown selected experimental investigations, which demonstrate that under ＂optimal design＂ of buildings integrated with IDRIZI wall system, up to 80% of earthquake energy input in the structure can be dissipated by the friction mechanism of the IDRIZI devices. This feature provides remarkable improvements on the seismic performance of residential buildings or any other type of building where masonry walls are abundantly present.
文摘Perhaps the best way to demonstrate the gained improvements in seismic performance of buildings, integrated with IDRIZI infill walls, is to analyse typical building structures subjected to real case earthquake scenarios. This paper presents obtained analytical results for a characteristic 2D frame structure which （besides the self-weight, superimposed dead loads and live loads） is subjected to real earthquake ground motions. This study case treats three story planar RC （reinforced concrete） frame opened on the ground story while its upper stories are infilled with classical masonry walls. The purpose of this study case is to demonstrate ＂quantitatively＂ the seismic performance of this frame structure and, more importantly, to estimate the level of seismic response improvements of the frame when at its ground story is utilized IDRIZI infill wall with door opening. The seismic action considered for this study case is a representation of the 1979 Tivari earthquake, Montenegro. Ultimately, this study demonstrates the remarkable benefits the structure gains （in terms of seismic performance and safety） by the use of IDRIZI wall system as a constitutive part of the 2D frame structure.
文摘As capacity design philosophy suggests, the best way to achieve a safe seismic response of multistory buildings, under strong earthquakes, is to uniformly spread the inelastic deformation demands throughout the building structure. Unfortunately, this type of mechanism is difficult to be reached due to the abundant presence ofinfill wall panels on buildings, which under strong earthquakes show severe cracks and strength degradations, thus complicating the seismic response of buildings. In order to avoid these brittle mechanisms of failure, studies were made toward development of new seismic protection system which would completely protect the infill walls from any cracks and strength degradation manifestations and simultaneously improve the seismic response of the entire structure. Utilization of the ＂IDRIZI＂ seismic protection system, would greatly contribute to many important aspects, like the increase of structural seismic performance, drastic reduction of damages under strong earthquake events and avoiding any unpredictable local failure mechanisms on buildings.
