Bidirectional Load Effects on Seismic Resistance of Flat- Plate Construction

双向荷载对平板建筑抗震性能的影响

• 批准号: 8410738
• 负责人: Jack Moehle
• 金额: $ 12.69万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-07-15 至 1988-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8410738&HistoricalAwards=false
• 关键词: Bidirectional; Load; Effects; Seismic; Resistance

Integrated experimental and analytical research is required to develop an understanding of the effects of realistic, bidirectional seismic loadings on the resistance of reinforced concrete flat-plate construction. To accomplish this objective, six interior plate-column assemblies are fabricated and subjected to either unidirectional or bidirectional reversed lateral loadings in the elastic and inelastic ranges in this project. Three of the assemblies are subjected to relatively simple, predetermined displacement histories so that mechanics of connection behavior under bidirectional loadings can be studied. The remaining three connections are loaded using the pseudodynamic test method, for which the displacement history is determined for a particular base motion based on the dynamic equations of equilibrium and the measured load-displacement characteristics of the connections. The latter tests will provide insights into the effects of bidirectional inelastic behavior on the response to two orthogonal directions of base motion. Analytical studies are conducted to provide improved insights into the mechanics of bidirectional connection behavior and into the effects of bidirectional base motions on overall structural performance.

为了了解实际双向地震荷载对钢筋混凝土平板结构抗力的影响，需要进行综合的试验和分析研究。为了实现这一目标，在本项目中，制造了六个内部板柱组件，并在弹性和非弹性范围内承受单向或双向反向横向荷载。其中三个组件经历了相对简单的预定位移历史，以便可以研究双向加载下的连接行为机理。其余三个节点使用拟动力试验方法加载，该方法基于节点的动力平衡方程和实测的荷载-位移特性来确定特定基础运动的位移历史。后一项试验将深入了解双向非弹性行为对两个正交基运动方向的响应的影响。进行了分析研究，以提供对双向连接行为的力学和双向基础运动对整体结构性能的影响的改进见解。