Unified design method for seismic resistance of braced steel frames
支撑钢框架抗震统一设计方法
基本信息
- 批准号:4727-2011
- 负责人:
- 金额:$ 1.53万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2015
- 资助国家:加拿大
- 起止时间:2015-01-01 至 2016-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Current seismic design standards, such as NBCC 2005, are based on the concept of the performance-based design. The principle of the performance-based seismic design is to make sure that a structure can perform in a desired manner under various intensities of earthquake. According to the procedure of the performance-based design, single or multiple performance objectives are selected in the conceptual design phase. Then, the target performance is described in accordance with the considered parameters, which can be force-related or deformation-related parameters. Acceptable limits of these parameters with respect to each level of seismic hazard are quantified. In the conceptual design step, layout of the structure is determined. One important issue in this step is to determine the yielding mechanism of a suitable structural system with appropriate energy dissipation elements (EDEs).
Most of the current design standards for steel structures, such as CAN/CSA S16-09, adopt the force-based design approach for EDEs. The advantages of the force-based design method are easy to use and safe (lower bound solutions). However, the solutions from the method may not be the most economical design. Based on the capacity design concept, the EDEs must yield before boundary elements, the design may yield the over capacity design in the boundary elements. Therefore, to satisfy the requirements of the capacity design, either weakening EDEs or strengthening boundary elements is normally used to avoid the over-strength of the EDEs.
The objective of this proposed research program is to develop a unified design approach for the seismic resistance of braced steel frames. A systematic study of various parameters, which include specific stiffness and ductility demands, as outlined in NBCC 2005, of braced steel frames will be studied. This research will focus on three distinct bracing systems: concentric braced frames (CBF), steel panel shear walls (SPSW), and bucking restrained braced frames (BRBF). Both numerical study and experimental investigation will be used to verify and develop innovative design for section reduction in each of CBF, SPSW, and BRBF systems.
目前的抗震设计标准,如NBCC 2005,是基于基于性能的设计概念。基于性能的抗震设计的原则是确保结构在各种烈度的地震下都能以期望的方式工作。根据性能设计的程序,在概念设计阶段选择单个或多个性能目标。然后,根据考虑的参数描述目标性能,这些参数可以是与力相关的参数,也可以是与变形相关的参数。这些参数相对于每个地震危险级别的可接受限度进行了量化。在概念设计阶段,确定结构布局。这一步骤中的一个重要问题是确定具有适当耗能单元(EDEs)的合适结构体系的屈服机理。
项目成果
期刊论文数量(0)
专著数量(0)
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会议论文数量(0)
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{{ truncateString('Cheng, JungJuneRoger', 18)}}的其他基金
Unified design method for seismic resistance of braced steel frames
支撑钢框架抗震统一设计方法
- 批准号:
4727-2011 - 财政年份:2014
- 资助金额:
$ 1.53万 - 项目类别:
Discovery Grants Program - Individual
Unified design method for seismic resistance of braced steel frames
支撑钢框架抗震统一设计方法
- 批准号:
4727-2011 - 财政年份:2013
- 资助金额:
$ 1.53万 - 项目类别:
Discovery Grants Program - Individual
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