Performance of Masonry and Masonry Veneer Buildings in the 1989 Loma Prieta Earthquake

这是1989年10月洛马普列塔地震后的一个调查项目，旨在从这次破坏性事件中吸取教训。本课题的重点是在分析和损伤观测的基础上，研究地震对砌体和砌体贴面建筑的影响。该项目的总体目标是提高美国砌体和砌体贴面建筑的抗震安全性。其具体目标是评估1989年10月洛马普里塔地震中砖石和砖石贴面建筑的抗震性能，特别注意选定建筑物的行为。将承担以下任务：1)审查砌体和砌体贴面建筑的整体行为；2)选择少量（3-5）这样的建筑进行进一步研究，基于它们作为原型的有用性，并根据强震记录的可用性，3)详细研究它们的损害，并将它们的反应与分析预测的反应进行比较；4)通过这种比较，评估现有砌体设计规范的有效性，估计现有砌体建筑的可能危害，并为砌体建筑的修复和改造提供有用的信息。本研究将有助于提高人们对砌体和砌体贴面建筑的地震损伤的认识，并开发出切实可行的方法来减轻地震危险区现有建筑的未来损伤。

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. The thrust of this project is to study the earthquake effect on masonry and masonry veneer buildings based on analysis and damage observations. The overall objective of this project is to improve the seismic safety of masonry and masonry veneer buildings in the United States. Its specific objective is to evaluate the seismic performance of masonry and masonry veneer buildings in the October 1989 Loma Prieta earthquake, with particular attention to the behavior of selected buildings. The following task will be undertaken: l) review the overall behavior of masonry and masonry veneer buildings; 2) select a small number (3-5) of such buildings for further study, based on their usefulness as prototypes, and on the availability of strong-motion records, 3) study their damages in detail, and compare their responses with that predicted analytically; and 4) using this comparison, assess the effectiveness of existing masonry design codes, estimate the probable hazard of existing masonry buildings, and provide useful information to those concerned with the repair and retrofit of masonry buildings. This study will lead to an improved understanding of the seismic damage to masonry and masonry veneer buildings and the development of practical ways to mitigate such future damage to such existing buildings in seismic hazard areas.