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Pre‐ and post‐test analyses of the structural response of a three‐storey asymmetric reinforced concrete frame building were performed, aimed at supporting test preparation and performance as well as studying mathematical modelling. The building was designed for gravity loads only. Full‐scale pseudo‐dynamic tests were performed in the ELSA laboratory in Ispra. In the paper the results of initial parametric studies, of the blind pre‐test predictions, and of the post‐test analysis are summarized. In all studies a simple mathematical model, with one‐component member models with concentrated plasticity was employed. The pre‐test analyses were performed using the CANNY program. After the test results became available, the mathematical model was improved using an approach based on a displacement‐controlled analysis. Basically, the same mathematical model was used as in pre‐test analyses, except that the values of some of the parameters were changed. The OpenSees program was employed. Fair agreement between the test and numerical results was obtained. The results prove that relatively simple mathematical models are able to adequately simulate the detailed seismic response of reinforced concrete frame structures to a known ground motion, provided that the input parameters are properly determined. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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武汉天兴洲大桥是武汉市继长江大桥之后又一座大型公铁两用大桥,两岸市政配套工程属大型市政工程,详细介绍了它的控制测量和地形测量技术方案及产品的检查验收,为类似工程的测量方案提供借鉴。 相似文献
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一种Delaunay三角网的快速生成算法 总被引:3,自引:0,他引:3
本文以Lawson提出的逐点插入法为基础,借鉴方向搜索的思想,在确定插入点的影响凸包时,采用递归的局部搜索策略,形成了一种Delaunay三角网的快速生成算法。实验证明,新算法构网时间与点数基本成线性增长关系,具有较高的效率。 相似文献
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S. Gentes 《Bulletin of Earthquake Engineering》2006,4(2):193-205
The main problem in the rescue of people buried alive in damaged buildings are pieces of rubble with a diameter less than 150 mm. Since they cover the whole site, it is neither possible to scrutinize the structure of the rubble nor to estimate the dimensions of beams, columns, and parts of ceilings. The central idea of a project at the University of Karlsruhe, Institute for Technology and Management in Construction, is the automatic removal of small pieces of rubble by a suction unit. The computer-controlled pipe which is fastened to the boom of an excavator automatically follows the structure of the heap of rubble. Therefore, it can also work in areas which are out of the driver’s visible range. The suction plant replaces the dangerous manual removal which is current standard. Furthermore, a pneumatic extraction system has been designed and constructed in combination with demolition machinery, e.g. crushers and dry wire-saw technologies, to immediately suck off the crushed material (reinforced concrete, masonry). 相似文献
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