Design of gravity force-resisting systems accounting for seismic displacement demands

考虑地震位移需求的抗重力系统设计

基本信息

批准号：
543549-2019
负责人：
MolinaHutt, Carlos
金额：
$ 1.53万
依托单位：
University of British Columbia
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2019
资助国家：
加拿大
起止时间：
2019-01-01 至 2020-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=677722
关键词：
Design gravity force resisting systems

项目摘要

The structural system in a building must be designed to resist both vertical loads from gravity, as well as lateral loads imposed by wind or seismic action. It is common in structural design for the structural frame to consist of two separate systems: a gravity force-resisting system and a lateral force-resisting system. While seismic codes have traditionally focused on the design requirements of lateral force-resisting systems, ground shaking due a seismic event will cause the entire structure to deform, i.e. it will impose deformation demands both in the gravity and the lateral force-resisting systems. In this regard, the latest edition of the concrete design standard in Canada recognizes that failure of gravity frames is one of the most common causes of building collapse during an earthquake. Thus, the code introduced a new requirements intended to ensure adequate levels of strength and ductility in elements that are not part of the seismic force-resisting system, but are subjected to seismically induced deformations. Conventional structural design relies on equivalent linear elastic analysis models to replicate anticipated nonlinear response in buildings. However, this new requirement of the concrete design standard in Canada does not address how to accurately develop this equivalent linear elastic analysis model for the seismic design of gravity frames. To address this challenge, Glotman Simpson is partnering with the University of British Columbia to develop a procedure that provides consistent and trustworthy results to facilitate these new design checks of gravity frames per the latest code requirements. This work will facilitate the continued delivery of safe and economical designs.

建筑物中的结构系统必须旨在抵抗重力的垂直载荷，以及风或地震作用施加的侧向载荷。结构框架在结构设计中很常见，由两个独立的系统组成：耐重力的系统和抗横向力的系统。尽管传统上，地震代码一直集中在抗横向力的系统的设计要求上，但由于地震事件的地震事件的地面摇动将导致整个结构变形，即，它将在重力和抗强力抗压系统中施加变形需求。在这方面，加拿大的最新版本的混凝土设计标准认识到，重力框架失败是地震期间建筑崩溃的最常见原因之一。因此，该法规引入了新的要求，旨在确保不属于抗震力的系统的元素中的强度和延展性水平，但会受到地震诱导的变形。常规的结构设计依赖于等效的线性弹性分析模型来复制建筑物中预期的非线性响应。但是，加拿大混凝土设计标准的这一新要求并没有解决如何准确开发这种重力框架地震设计的等效线性弹性分析模型。为了应对这一挑战，Glotman Simpson正在与不列颠哥伦比亚大学合作开发一项程序，该程序可提供一致且值得信赖的结果，从而根据最新的代码要求促进这些重力框架的新设计检查。这项工作将有助于继续提供安全，经济的设计。