Development of procedures to enhance the performance of rehabilitated URM buildings
Development of procedures to enhance the performance of rehabilitated URM buildings
复制标题
制定程序以提高修复后的 URM 建筑的性能
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
D. Abrams
中科院分区：
文献类型：
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作者：
B. Lizundia;D. Abrams
1994年北岭地震提供了一个主要的测试，目前的无钢筋砌体承重墙（URM）建筑物的修复方法的有效性。大量的改造URM建筑样本被震动，许多在高水平的地面运动，并收集了大量的地面运动和损坏数据。大多数加固的建筑物已按照建筑规范第88节（1985年）中的洛杉矶市标准进行了修复，该标准与UBC（1994年）和FEMA 178（1992年）等其他标准相似。这些标准都旨在降低生命安全的风险。在北岭地震中，虽然没有人因翻新的URM建筑物损坏而丧生，但仍有大量财产损失，一些建筑物不得不腾空。在某些情况下，损坏严重，建筑物最终被拆除，因为认为修复在经济上不可行。本研究旨在开发可用于提高修复后URM建筑性能的程序。本报告分为报告主体（NIST GCR 97-724-1）中的三个部分和单独卷（NIST GCR 97-724-2）中的四个附录，这些附录解决了研究工作计划中的具体任务。这些任务是：（1）分析地震破坏数据，（2）目前做法在全国范围内的适用性，（3）研究提高URM墙性能的技术，（4）效益-成本考虑，以及（5）制定提高修复后URM建筑性能的程序。附录A给出了任务1的结果。附录B给出了任务2的结果。附录C包含任务3研究总结，记录了URM壁增强方法的相关实验研究。附录D包含任务4中为选定的增强程序开发的成本和有限受益信息。报告的主体部分总结、综合和评价了附录中所载的结果。第1.3节总结了这五项任务。第2节包含建议的URM修复增强程序。第3节讨论了在研究过程中确定的某些施工实践、修复方法和经验性能数据收集的未解决问题和研究需求。Rutherford & Chekene公司作为NIST的主承包商参与了这项研究。Rutherford & Chekene分包顾问的参与情况如下：
The 1994 Northridge Earthquake provided a major test of the effectiveness of current rehabilitation methods for unreinforced masonry bearing wall (URM) buildings. A large sample of retrofitted URM buildings were shaken, many at high levels of ground motion, and a substantial amount of ground motion and damage data was collected. The majority of the strengthened buildings had been rehabilitated to the City of Los Angeles standards in Building Code Division 88 (1985), which is similar to others such as UBC (1994) and FEMA 178 (1992). These standards all aim to reduce the risk oflife safety. While no lives were lost due to retrofitted URM building damage in Northridge Earthquake, there was nonetheless a substantial amount of property damage, and a number ofbuildings had to be vacated. In some cases, the damage was significant and the buildings were eventually demolished because repair was deemed economically unfeasible. This study was to develop procedures that can be used to enhance the performance of rehabilitated URM buildings. The report is organized into three sections in the main body of the report (NIST GCR 97-724-1) and four appendices in a separate volume (NIST GCR 97-724-2), which address specific tasks in the study' workplan. These tasks are: (1) analysis of the earthquake damage data, (2) applicability of current practice nationwide, (3) study of techniques to enhance the performance of URM walls, (4) benefit-cost considerations, and (5) development of procedures to enhance the performance of rehabilitated URM buildings. Appendix A presents the results of Task 1. Appendix B presents the results of Task 2. Appendix C contains the Task 3 research summaries documenting relevant experimental studies of URM wall enhancement methods. Appendix D contains the cost and limited benefit information developed in Task 4 for selected enhancement procedures. The main body of the report summarizes, synthesizes, and evaluates the results contained in the appendices. Section 1.3 provides a summary of each of the five tasks. Section 2 contains recommended enhancement procedures for URM rehabilitation. Section 3 provides a discussion of the unresolved issues and research needs identified during the study for certain construction practices, rehabilitation methods, and collection of empirical performance data. Development ofProcedures to Enhance the Performance ofRehabilitated URM Buildings Project Responsibility Rutherford & Chekene served as the prime contractor to NIST for this study. The involvement of subconsultants·to Rutherford & Chekene is as follows: