Existing Masonry Infill Building Test Program

现有砖石填充建筑测试计划

• 批准号: 9102347
• 负责人: Gary Hart
• 金额: $ 3万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-15 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102347&HistoricalAwards=false
• 关键词: Existing; Masonry; Infill; Building; Test

This project proposes to take immediate advantage of a unique opportunity to obtain valuable full-scale test data on the seismic performance of existing multi-story building frames with masonry infill walls in the City of Los Angeles. Four older, existing buildings constructed between 1913 and 1917 are scheduled for demolition in downtown Los Angeles in late December. This group of buildings consists of: one 12-story building, two 4-story buildings, and one 7-story building, all with infill masonry infill walls. These building types are representative of the many hundreds, if not thousands, of similar buildings that exist in seismic regions in the U.S. The P.I. has been given permission by the building owners and local officials to test these buildings before they are demolished by using testing procedures on the building components and subassemblies that will provide invaluable information on their seismic load/deformation characteristics. The City of Los Angeles is involved as a major coordinator in this project and is contributing donated time for participation by one of its officials. As the buildings will be demolished by late December, time is of the essence in obtaining this perishable data. The research plan encompasses a testing program that includes: 1. Out of plane testing of infill walls. 2. In plane testing of infill walls and material properties. 3. Concrete and steel frame construction details. 4. Concrete encased steel frame beam/colum connections. 5. Full scale building harmonic shaker vibration. One major objective of this research is to document the steel rebar steel types/taps, etc., and the types of connections in the steel frames. In addition, material strengths will be measured in order to develop specific numbers for the performance of similar existing building classes and construction types of the same age. Another major objective will be placed on the use of nondestructive testing instruments that is in current application by structural engineers in the Los Angeles region to determine the location of rebars. This project is expected to produce valuable results for the advancement of earthquake engineering research in the investigation of the older, existing building problem.

该项目建议立即利用一个独特的机会，获取有关洛杉矶市现有砖石填充墙多层建筑框架抗震性能的宝贵全面测试数据。 洛杉矶市中心的四栋 1913 年至 1917 年间建造的旧建筑计划于 12 月底拆除。 该组建筑由：1栋12层建筑、2栋4层建筑、1栋7层建筑组成，均为砌体填充墙。 这些建筑类型代表了美国地震区存在的数百甚至数千座类似建筑。建筑物业主和当地官员已允许在拆除这些建筑物之前使用对建筑构件和组件的测试程序进行测试，这将提供有关其地震荷载/变形特征的宝贵信息。 洛杉矶市作为该项目的主要协调者参与其中，并为其中一名官员的参与贡献了捐赠时间。 由于建筑物将于 12 月下旬拆除，因此时间对于获取这些易腐烂的数据至关重要。 该研究计划包含一个测试计划，其中包括： 1. 填充墙的平面外测试。 2. 填充墙和材料性能的平面测试。 3.混凝土和钢框架施工细节。 4.混凝土包裹的钢框架梁/柱连接。 5.全尺寸建筑谐波振动台振动。 这项研究的一个主要目标是记录钢筋类型/丝锥等，以及钢框架中的连接类型。 此外，还将测量材料强度，以便为同龄的现有类似建筑类别和建筑类型的性能制定具体数据。 另一个主要目标将是使用洛杉矶地区结构工程师目前正在使用的无损检测仪器来确定钢筋的位置。 该项目预计将在调查旧的现有建筑问题方面为地震工程研究的进步产生有价值的成果。