Response of Low Rise Industrial and Commercial Buildings to Near Field Ground Motion

9416232汉堡轻工业建筑的倾斜和钢筋砌体结构与镶板胶合板屋顶房子数以千计的工人在美国西部此外，战略部门的美国西部经济，包括航空航天，国防，电子，银行，零售和半导体行业都位于建筑物内的建设。 这些建筑物在大区域地震中的表现显然对社会广泛阶层的安全和福利有重大的潜在影响。 这座建筑在1971年圣费尔南多地震中被证明容易受到地震引起的倒塌的影响。 20世纪70年代中期颁布的建筑规范修改有效地减轻了这种脆弱性。 然而，在北岭地震的震中地区，超过400个这样的结构，许多符合这些更新的规范要求，经历了部分倒塌，以图形方式证明了目前的设计方法的不足。 本项目检查这些商业和轻型工业建筑物的木结构屋顶对近源地面运动的反应，以确定北岭地震中这些结构的成因失效模式，并制定和协助实施有效的设计程序变更，以尽量减少未来可能影响洛杉矶地区的灾难性故障的可能性，旧金山弗朗西斯科湾地区，普吉湾地区和其他地区的强烈发展，在地震活跃带。 这项研究的结果将以易于实施的形式直接提交给准则和标准制定机构。将提出修改设计规范的建议，以便在近震源区提供足够的裕度。***

9416232 Hamburger Light industrial buildings of tiltup and reinforced masonry construction with panelized plywood roofs house thousands of workers in the Western U.S. In addition, strategic sectors of the Western U.S. economy including the aerospace, defense, electronics, banking, retailing and semiconductor industries are located within buildings of this construction. The performance of these buildings in a major regional earthquake clearly has major potential impact on the safety and welfare of broad segments of the society. This construction was shown to be vulnerable to earthquake induced collapses in the 1971 San Fernando earthquake. Building code changes were enacted in the mid-1970s were effective in mitigating this vulnerability. However, more than 400 such structures in the epicentral region of the Northridge earthquake, many conforming to these updated code requirements, experienced partial collapse, graphically demonstrating the inadequacy of current design approaches. This project examines the response of these commercial and light industrial buildings with wood framed roofs to near source ground motions, to determine the causative failure modes for these structures in the Northridge Earthquake, and to develop and assist in implementing effective design procedure changes to minimize the potential for catastrophic failures in future events capable of affecting the Los Angeles region, San Francisco Bay Area, Puget Sound region and other areas of intense development within seismically active zones. The findings of this research will be directly presented to code and standards development bodies, in forms which can readily be implemented. Recommendations will be developed to modify the design codes to provide adequate margin in the near source zones of earthquakes. ***