既有大跨预制工业建筑结构建模与概率地震评估

IF 3.8 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
Luca Capacci, Bruno Dal Lago
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引用次数: 0

摘要

预制混凝土框架结构构成了意大利境内工业建筑遗产的主要建筑技术。这些建筑大多是根据过时的地震设计标准构思的,其危险性低于目前公认的标准,而分布在意大利领土上的大多数工业化地区在不到20年的时间里被宣布为地震活跃区。本文重点研究了现代设计技术的代表——大跨度平顶工业建筑的抗震性能评价。位于意大利境内地震危险增加地区的建筑物是根据1996年之后生效的标准设计的原型现有建筑。通过模态响应分析、非线性静态推覆分析和非线性时程分析研究了多条带方法的抗震性能。水平隔膜的灵活性以及抵抗框架与覆层系统的相互作用通过探索逐步先进的建模策略来解决,直至包括屋顶构件,外围面板和所有相关连接的详细组装。柱单元、销钉梁与柱、板与梁连接、绑带绑带和支架支座板与框架连接的力学非线性均采用集总塑性模型,采用实验校准的本构律。地震风险的评估是通过多条带分析来估计故障率,包括从可用性防止破坏到整体崩溃的性能水平。结果取决于场地,对于设计在平均和高地震活动地区的建筑物来说,这些典型的预制系统的改造需求被认为是迫切的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural modelling and probabilistic seismic assessment of existing long-span precast industrial buildings

Precast concrete frame structures constitute a major construction technology of the industrial built heritage within the Italian territory. Most of these buildings were conceived according to obsolete seismic design criteria with lower hazard than currently recognised standards, whilst the most industrialised areas spread over the Italian territory were declared seismically active since less than 20 years. This paper focuses on seismic performance assessment of long-span flat-roof industrial buildings, representative of modern design technologies. Buildings located in areas with increasing seismic hazard over the Italian territory were designed following an archetype existing building based on standards in force after 1996. Seismic performance is investigated by modal response analysis, non-linear static pushover analysis, and non-linear time-history analysis with a multi-stripe approach. The flexibility of the horizontal diaphragm and the interaction of the resisting frame with the cladding system are addressed by exploring progressively advanced modelling strategies up to a detailed assembly comprising roof members, peripheral panels, and all related connections. Mechanical non-linearities regarding column elements, dowel beam-to-column and slab-to-beam connections, strap tie-back and bracket bearing panel-to-frame connections are modelled with lumped plasticity employing experimentally calibrated constitutive laws. Seismic risk is assessed by estimating via multi-stripe analysis failure rates encompassing performance levels from usability preventing damage to global collapse. The results are site-dependent, and the need for retrofit of these typical precast systems is deemed to be urgent for both buildings designed in areas of average and high seismicity.

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来源期刊
Bulletin of Earthquake Engineering
Bulletin of Earthquake Engineering 工程技术-地球科学综合
CiteScore
8.90
自引率
19.60%
发文量
263
审稿时长
7.5 months
期刊介绍: Bulletin of Earthquake Engineering presents original, peer-reviewed papers on research related to the broad spectrum of earthquake engineering. The journal offers a forum for presentation and discussion of such matters as European damaging earthquakes, new developments in earthquake regulations, and national policies applied after major seismic events, including strengthening of existing buildings. Coverage includes seismic hazard studies and methods for mitigation of risk; earthquake source mechanism and strong motion characterization and their use for engineering applications; geological and geotechnical site conditions under earthquake excitations; cyclic behavior of soils; analysis and design of earth structures and foundations under seismic conditions; zonation and microzonation methodologies; earthquake scenarios and vulnerability assessments; earthquake codes and improvements, and much more. This is the Official Publication of the European Association for Earthquake Engineering.
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