Response and Damage of Unreinforced Masonry Buildings in Loma Prieta Earthquake

这是洛马普里埃塔地震(1989年10月)后的一次调查项目，目的是从这一破坏性事件中吸取教训。该项目将重点研究无筋砖砌建筑在地震中的性能。选定结构的响应将使用计算模型进行估计，并与对结构强度的预期和对损伤的观察相关联。这项研究将涵盖阿拉米达、蒙特利、圣克拉拉、圣克鲁斯和旧金山等县的建筑。受损和未受损的结构都将被考虑。这项研究将包括各种各样的砖石构件类型，包括抵抗其平面内和垂直于其平面的力的结构墙、钢框架或混凝土框架中的填充板、覆层、护墙和其他非结构构件。工程建筑和非工程建筑都将被研究。候选结构将根据破坏程度、预期受力水平、位置、土壤条件以及有关地面运动和结构描述的信息的可用性来选择进行调查。预计所获得的知识将有助于减轻美国东部的地震风险，因为在可能发生中等强度地震的地区，广泛使用无筋砖石结构。

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. The project will focus on the study of performance of unreinforced masonry buildings (UMR) during the earthquake. Response of selected structures will be estimated using computational models, and correlated with expectations of structural strength and observations of damage. The study will encompass buildings located in the counties of Alameda, Monterey, Santa Clara, Santa Cruz and San Francisco. Both damaged and undamaged structures will be considered. The study will include a wide variety of masonry element types including structural walls resisting forces within and normal to their plane, infill panels in either steel or concrete frames, cladding, parapets, and other nonstructural elements. Both engineered and nonengineered construction will be studied. Candidate structures will be selected for investigation based on degree of damage, expected force level, location, soil conditions, and availability of information on ground motions and structural descriptions. It is expected that knowledge gained will be helpful for mitigating the earthquake hazard in the eastern USA because of the widespread use of unreinforced masonry in those regions of a potential moderate intense earthquake.