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A new steel framing system for seismic protection of timber platform frame buildings. Implementation with hysteretic energy dissipators 
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下载免费PDF全文 This paper describes a new seismic protection system for timber platform frame buildings, either for new construction or retrofit. The system consists in connecting the timber frame to a steel structure that includes hysteretic energy dissipators designed to absorb most of the seismic input energy thus protecting the timber frame and the other steel members; alternatively, the system might use other types of dissipative devices. The steel structure consists of four steel stacks (located at each of the four façades) and steel collectors embracing each slab; the stacks and the collectors are connected, at each floor level, through the energy dissipators. The steel structure is self‐supporting, that is, the timber frame is not affected by horizontal actions and can be designed without accounting for any seismic provision; in turn, the steel members do not participate in the main load‐carrying system. The timber‐steel interface is designed to avoid any stress concentration in the transfer of horizontal forces and to guarantee that the yielding of the dissipators occurs prior to any timber failure. The energy dissipation capacity of the suggested system is discussed, and an application example on a six‐story timber building is presented; this case corresponds to highly demanding conditions because of the relatively large building height and weight, the high local seismicity, and the soft soil condition. This research belongs to a wider project aiming to promote the structural use of timber by improving the seismic capacity of wooden buildings; this research includes experiments and advanced numerical simulation. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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Landslides - In this study, we suggest a temperature-based assessment and mitigation approach for deep-seated landslides that allows to forecast the behavior of the slide and assess its stability.... 相似文献
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TERRAIN APPROXIMATION BY FIXED GRID POLYNOMIAL 总被引：1，自引：0，他引：1
W. P. Segu 《The Photogrammetric Record》1985,11(65):581-591
A method of describing terrain by a fixed grid polynomial is described. The method employs a Chebyshev polynomial with a least squares criterion of fit. The least squares fit is carried out on an iterative basis to a prescribed degree of fit, either of a root mean square residual, or of a standard deviation of the fitted surface, or of a percentage of the total sum of squares of the residuals. The fitting data overlap along the common boundaries of the grids. Interpolation at any new point is carried out patchwise. An application of the method in highway engineering is described. 相似文献
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