Collaborative Research: Transforming Building Structural Resilience through Innovation in Steel Diaphragms
合作研究:通过钢隔膜创新改变建筑结构的弹性
基本信息
- 批准号:1562490
- 负责人:
- 金额:$ 18万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2016
- 资助国家:美国
- 起止时间:2016-09-01 至 2021-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
America relies on a robust and resilient building stock to minimize harm to its citizens and damage to its economy due to extreme natural hazards such as earthquakes and hurricanes. In the past, structural engineers have focused their attention on creating stronger, more ductile, more reliable lateral-resistance systems that can be used within the walls of buildings to resist the extreme demands associated with these natural hazards. Comparatively little attention has been paid to the role of the floor systems of buildings in resisting these demands. The floor diaphragm acts as a critical element that distributes the demands developed in a building during an extreme event to the lateral-resistance systems and eventually to the building foundation. Steel deck, i.e., thin corrugated steel panels typically with concrete fill, forms one of the most commonly used diaphragm elements in multi-story steel buildings. This project has as its objectives: to develop fundamental understanding of steel deck diaphragms as structural systems integrated within the overall building performance, to develop improved strategies for accurate modeling of floor systems within three-dimensional building models, and to develop new solutions for steel deck diaphragms that enhance the overall structural resilience of buildings.Current lack of knowledge about floor diaphragm systems impedes a needed evolution for building design approaches from focusing on two-dimensional frame design to enabling creative solutions within three-dimensional building design. The utilization of the diaphragm as an energy dissipating system has not been harnessed nor optimized in buildings. This project will develop a series of building archetypes appropriate to steel deck diaphragms. An integrated experimental program will be conducted at the connection and diaphragm scale, including novel non-contact measurement schemes for revealing damage and deformations during testing, to bridge critical knowledge gaps that currently impede three-dimensional modeling and design of buildings. To explore new solutions for energy-dissipating diaphragms, this project will perform testing of structural fuses and develop prototypes for integrating these fuses into steel diaphragm systems. This project will also complete high fidelity material and geometric nonlinear finite element models to enable detailed investigations of the flow of forces in diaphragms and between the diaphragm and all connected components. A series of lower fidelity, reduced order models will be developed, appropriate for whole building analysis of selected building archetypes. Formal optimization of the role of the diaphragm in building response, including a novel two-level optimization scheme, will be performed. Taken together, these activities will provide a significant advancement in the state-of-the-art for design of building diaphragms. Through a comprehensive outreach effort with industry, the findings will be transferred to engineers and utilized to improve the structural resilience of the nation's buildings.
美国依靠强大而有弹性的建筑存量,以尽量减少地震和飓风等极端自然灾害对公民的伤害和对经济的破坏。在过去,结构工程师一直专注于创造更强大,更具延展性,更可靠的横向阻力系统,可用于建筑物的墙壁内,以抵抗与这些自然灾害相关的极端要求。相对而言,很少有人注意到建筑物的楼板系统在抵抗这些要求方面的作用。楼板横隔梁作为一个关键的元素,在极端事件期间将建筑物中产生的需求分配给侧向阻力系统,并最终分配给建筑物基础。钢甲板,即,通常带有混凝土填充的薄波纹钢板形成了多层钢建筑中最常用的横隔梁元件之一。该项目的目标是:发展对钢桥面板作为整体建筑性能中集成的结构系统的基本理解,发展在三维建筑模型中精确建模楼板系统的改进策略,并开发新的解决方案,为钢桥面板隔膜,提高建筑物的整体结构弹性。目前缺乏知识的地板隔膜系统阻碍了所需的建筑设计方法的演变,从关注二维框架设计到在三维建筑设计中实现创造性解决方案。在建筑物中,隔膜作为能量耗散系统的利用尚未得到利用或优化。本项目将开发一系列适用于钢桥面横隔板的建筑原型。将在连接和隔膜规模上进行综合实验计划,包括用于揭示测试期间损坏和变形的新型非接触式测量方案,以弥合目前阻碍建筑物三维建模和设计的关键知识差距。为了探索耗能隔膜的新解决方案,该项目将对结构保险丝进行测试,并开发将这些保险丝集成到钢隔膜系统中的原型。该项目还将完成高保真材料和几何非线性有限元模型,以详细研究隔膜中以及隔膜与所有连接部件之间的力流。将开发一系列较低保真度、降阶模型,适用于选定建筑原型的整体建筑分析。正式优化的作用,隔膜在建筑物的反应,包括一个新的两级优化方案,将进行。总之,这些活动将提供一个显着的进步,在国家的最先进的设计建筑物的隔膜。通过与工业界的全面外联工作,调查结果将转交给工程师,并用于提高国家建筑物的结构弹性。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Jerome Hajjar其他文献
Multi-dimensional Earthquake Response of Se-lfcentering Building Structural System Using Upliftresilient steel braced fersamwithMechanism
举升式弹性钢支撑框架自定心建筑结构体系的多维地震响应
- DOI:
- 发表时间:
2012 - 期刊:
- 影响因子:0
- 作者:
Azuhata,T.,Ishihara,T. and Midorikawa,Eatherton;Jerome Hajjar;Toru Takeuchi ;Kazuhiko Kasai and Mitsumasa Midorikawa;EarthquakeM - 通讯作者:
EarthquakeM
Jerome Hajjar的其他文献
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{{ truncateString('Jerome Hajjar', 18)}}的其他基金
Physics-Reinforced Deep Learning for Structural Metamodeling
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$ 18万 - 项目类别:
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1328816 - 财政年份:2013
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$ 18万 - 项目类别:
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Deconstructable Systems for Sustainable Design of Steel and Composite Structures
用于钢结构和复合结构可持续设计的可解构系统
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1200820 - 财政年份:2012
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Standard Grant
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$ 18万 - 项目类别:
Standard Grant
Performance Assessment and Performance-Based Design Metholodogy for Composite Construction with Application to Concrete-Filled Steel Tube Structural Systems
复合结构性能评估和基于性能的设计方法在钢管混凝土结构系统中的应用
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0084848 - 财政年份:2000
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$ 18万 - 项目类别:
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Conference: Composite Construction in Steel and Concrete IV
会议:钢与混凝土复合结构 IV
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9900355 - 财政年份:1999
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
Composite Interaction of Steel Frame Members and Reinforced Concrete Walls Under Seismic Loading
地震荷载下钢框架构件与钢筋混凝土墙的复合相互作用
- 批准号:
9810005 - 财政年份:1998
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
RIA: Three-Dimensional Nonlinear Cyclic Analysis of Concrete-Filled Tube Beam-Columns and Composite Subassemblies
RIA:混凝土管梁柱和组合组件的三维非线性循环分析
- 批准号:
9410473 - 财政年份:1994
- 资助金额:
$ 18万 - 项目类别:
Standard Grant
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