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首页> 外文会议>Increasing Seismic Safety by Combining Engineering Technologies and Seismological Data >Chapter 3.2 Assessment of Seismic Capacity of Existing Buildings - Effects of Uncertainties
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Chapter 3.2 Assessment of Seismic Capacity of Existing Buildings - Effects of Uncertainties

机译：第3.2章既有建筑物的抗震能力评估-不确定性的影响

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The seismic capacity of three buildings used as telecommunication centers in Greece is assessed based on design drawings that do not reflect accurately the "as built structure" and on limited information about the soil conditions. The buildings were designed under the old Greek codes for Earthquake Resistant Reinforced Concrete structures, already known to be quite inadequate both in the characterization of the seismic action and in providing sufficient strength and ductility to the structural members and the building as a whole. Steel telecommunication towers with several disk antennas had been added to the building roofs at later times. With limited knowledge about the type of soil at the building sites, the effect of soil flexibility was first examined in a parametric way and subsequently the assessment of the buildings' capacities was made on the basis of both elastic dynamic and inelastic static (pushover) analyses. For the latter analyses, the main uncertainty that was hereby addressed was the selection of a suitable horizontal load distribution. It was observed that different distribution may lead to different results regarding the buildings' capacity. However, in all cases examined, it was found that a drastic intervention would be needed to bring all three buildings up to current standards of increased seismic safety required by the new code for high importance telecommunication buildings that should stay operational during a strong, design level, earthquake.
机译：在希腊用作电信中心的三栋建筑物的抗震能力是根据不能准确反映“建成建筑物”的设计图纸以及有关土壤状况的有限信息进行评估的。这些建筑物是按照古希腊的抗震钢筋混凝土结构规范设计的，众所周知，该建筑物在地震作用的表征以及为结构构件和整个建筑物提供足够的强度和延展性方面都不够充分。后来将带有几个圆盘天线的钢制电信塔添加到了建筑物的屋顶。在对建筑工地土壤类型了解有限的情况下，首先以参数方式检查了土壤柔韧性的影响，随后在弹性动力和非弹性静力（推力）分析的基础上对建筑物的能力进行了评估。 。对于后面的分析，解决的主要不确定性是选择合适的水平载荷分布。据观察，不同的分布可能导致有关建筑物容量的不同结果。但是，在所有检查过的情况下，都发现需要采取严厉的干预措施，以使所有三座建筑物均达到新的高抗震电信规范的要求，以提高抗震安全性的当前标准，这些新规范应在坚固的设计水平上正常运行， 地震。

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