使用FEMA P-58方法论对直接DBD平台类型交叉层木材切割墙系统的地震损失评估
Hamed Dadkhah1,2, Cristiano Loss1
1Sustainable Engineered Structural Solutions Laboratory, Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4 Canada.
概括
基于直接位移的设计 (D-DBD) 提供了一个有效的替代方案,用于调整交叉层木材 (CLT) 建筑物的尺寸,以达到地震性能目标. 这种方法避免了经常在基于力量的设计 (FBD) 中看到的过度设计,特别是在更高的结构中.
科学领域:
- 结构工程 结构工程
- 地震工程的工程是地震工程.
- 木材建筑木材建筑工程
背景情况:
- 传统的基于力量的设计 (FBD) 对复杂的木结构 (如中高层建筑) 可能缺乏精度.
- 准确的地震设计方法对于木制建筑物达到性能目标至关重要.
研究的目的:
- 适应基于直接位移的设计 (D-DBD) 框架,用于平台类型的交叉层木材 (CLT) 剪墙系统.
- 为了验证 D-DBD 设计的 CLT 建筑物在不同高度的抗震性能.
- 将D-DBD性能与传统的FBD进行比较.
主要方法:
- 使用D-DBD和FBD两种方法设计4,8和12层木制建筑.
- 使用FEMA P-58评估地震性能,重点关注维修成本,时间和伤亡率.
- 分析了CLT剪切壁的地震反应.
主要成果:
- 基于力量的设计 (FBD) 可以导致高层平台类型的CLT墙壁的显著过度设计.
- 基于直接位移的设计 (D-DBD) 创建了能够在低层和高层CLT结构中处理可比损坏水平的系统.
- 虽然FBD对地震损失的评估略有改善,但D-DBD确保了建筑物的安全,而不会造成过度成本.
结论:
- 基于直接位移的设计 (D-DBD) 是设计交叉层木材 (CLT) 剪墙的可行且具有成本效益的替代方案.
- D-DBD可以实现木制建筑的目标地震性能水平,而无需额外的预付费用.
- 这种方法为实践者提供了一个更精确的工具,用于对木结构的地震大小进行测量.
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