Interface Mechanics of Masonry Panels under Biaxial Loading

双轴荷载下砌体板的界面力学

• 批准号: 1100971
• 负责人: Kaspar Willam
• 金额: $ 30.92万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100971&HistoricalAwards=false
• 关键词: Interface; Mechanics; Masonry; Panels; under

This project investigates the performance of brick and mortar wall panels under different combinations of in-plane loading representative of masonry structures under seismic events. An experimental program will take advantage of the existing "Universal Panel Tester" at the University of Houston to examine 1.4mx1.4m masonry panels under different combinations of biaxial compression and tension. A digital image correlation system will be used to trace progressive cracking and sliding in the bed and head joints of the brick and mortar material system and potential cracking of the brittle brick units. A computational model will be developed to capture the brittle-ductile failure mechanism of the two component material system, which will be validated from experimental observations to quantify inherent uncertainties in masonry construction.The research involves two graduate students under the direction of the two faculty in addition to one undergraduate student who will be trained (a) in the fields of servo-controlled multi-axial testing, (b) in the use of powerful imaging to track emerging failure mechanisms, and (c) in the field of computer modeling of effective material properties of masonry construction under different in-plane load scenarios. Special efforts will be undertaken to recruit diverse Undergraduate and Graduate students through the proximity with the Texas Southern University, TSU, located next to the University of Houston, and with Prairie View A&M University. National and international cooperation with our colleagues at the University of California-San Diego and at the Polytechnical University of Catalonia, UPC-Barcelona, will serve to reach out to the Hispanic communities, whereby a student exchange program will provide additional incentives.

本项目研究了具有代表性的砌体结构在不同面内荷载组合下的砌体墙板在地震作用下的性能。一个实验项目将利用休斯顿大学现有的“通用面板测试仪”，在不同的双轴压缩和拉伸组合下检测1.4mx1.4m砌体面板。数字图像相关系统将用于跟踪砖砂浆材料系统的床和头接缝的渐进开裂和滑动以及脆性砖单元的潜在开裂。将开发一个计算模型来捕捉双组分材料系统的脆性-韧性破坏机制，这将从实验观察中得到验证，以量化砌体结构中固有的不确定性。该研究涉及两位教师指导下的两名研究生以及一名本科生，他们将接受以下方面的培训：(a)伺服控制多轴测试领域，(b)使用强大的成像来跟踪新出现的破坏机制，以及(c)在不同面内荷载情况下砌体结构有效材料特性的计算机建模领域。通过毗邻休斯顿大学的德克萨斯南方大学（TSU）和Prairie View A&amp；M大学，将采取特别努力来招收多样化的本科生和研究生。我们与加州大学圣地亚哥分校和加泰罗尼亚理工大学（UPC-Barcelona）在国内和国际上的同事合作，将有助于接触西班牙裔社区，学生交换计划将提供额外的奖励。