Papers by Keyword: Isolation Device

Abstract: To enhance the seismic performance by using the traditional method of building function, will affect the building using function. Therefore, not affecting the building using performance, the isolation device for seismic reinforcement, only through the underground part of the building project can solve these problems. In this paper, through government building envelope analysis and time history analysis, the seismic strengthening of building structures under earthquake action effects before and after the isolation device, fully explain the role.

Abstract: Based on container cranes seismic load calculation criteria with structural dynamics and damage modes of container crane under earthquake, the seismic isolation device of this over-span flexible structure and its associated parameters selection were investigated. Taking the first crane equipped with isolating device as an example, through dynamic analysis and simulating to crane flexible system with isolation device under the earthquake, efforts was made to research for suitable isolation device and design method for port crane. The calculation and analysis in the present study could provide a new way for the container cranes isolation device design and assessment of the structural anti-seismic effect

Abstract: Vertical seism has the same damage to the structure as the horizontal earthquake did. But vertical seism has not been taken seriously as it should be because its acceleration is smaller than that of horizontal earthquake. This paper describes the characteristics of vertical seism and a kind of vertical isolation device is designed based on the application of pulsating hydraulic theory. Moreover, it also states theoretical analysis and experimental study about properties of the device.

Abstract: In this paper the new Italian seismic code issued in January 2008 is presented, with particular reference to the ample section devoted to constructions built with isolation and energy dissipation systems. Such attention is justified by the undisputed effectiveness of this design approach and by its increasing diffusion in the professional community. The code is based on Eurocode 8 [1], though resulting more synthetic and easier to use. During the last years of evolution, the code has significantly contributed to the development of new concepts in seismic isolation, such as the hybrid biaxial isolating/dissipating device here presented, obtained from parallel coupling of two different types of device: one mechanical, which realizes the necessary dissipation, and one elastomeric, which has the scope, beyond that of sustaining the vertical load, of reducing the deck residual displacement at the end of the seismic action. An application is shown of a seismically retrofitted highway bridge, in order to show the effectiveness of this device, both during, in terms of isolation, and at the end of the seismic event, in terms of residual displacements. For the sake of comparison, the same bridge is analyzed with different types of isolation techniques.