Performance-based seismic retrofit procedure with shake table validation

地震振动台 改装 摇动 抗震改造 工程类 低层 建筑规范 地震分析 土木工程 法律工程学 建筑工程 结构工程 钢筋混凝土 机械工程
作者
Pouria Bahmani,John W. van de Lindt,Steven E. Pryor,Gary Mochizuki
出处
期刊:Engineering Structures [Elsevier BV]
卷期号:205: 110012-110012 被引量:3
标识
DOI:10.1016/j.engstruct.2019.110012
摘要

Recent earthquakes such as Loma Prieta and Northridge in California have highlighted the poor performance of a specific class of existing buildings known as soft-story building. This is because many older buildings were designed prior to the implementation of modern seismic design codes. Although building codes have clearly evolved, the problem is still unresolved for older buildings that are code-deficient such as soft-story wood-frame buildings. Retrofitting these types of buildings came to the forefront after the 1989 Loma Prieta, 1992 Cape Mendocino, and 1994 Northridge earthquakes. This paper presents a new performance-based seismic retrofit (PBSR) methodology for existing wood-frame buildings with an extreme soft-story and torsional irregularity at their first story, i.e. the most common case for these types of buildings in the San Francisco Bay Area. The method was validated numerically using non-linear time history analysis and then was validated experimentally by conducting full-scale shake table tests on a four-story wood-frame building at NHERI @ UC San Diego (formerly NEES @ UCSD), the largest outdoor shake table in the United States. The method is shown to be applicable to these types of buildings and some advantages of the PBSR method over soft-story only retrofit methodologies are presented.
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