Experimental and Analytical Studies of Nonlinear Structural Systems Under Earthquake Load

该项目是实验工作分析的协调努力，旨在解决两个主要问题：验证数学模型和预测实际结构的能力。 该项目的重点是钢结构和构件。 要进行的实验和分析实验室研究可以方便地分为三个主要标题：（1）设备，（2）框架和（3）接头。 这些研究补充了正在进行或正在提议的现有运动地震的规模现场测试。 设备研究包括支持相关设备响应的故障模式的调查。 对于钢框架研究，将使用 4' x 6' 振动台来研究水平运动引起的响应以及框架刚度的垂直不规则性的影响。 将为选定的结构开发详细的非线性模型。 对于联合研究，将进行双轴全尺寸钢力矩连接试验并与分析预测进行比较。 调查人员都是具有良好记录的有能力的研究人员。 首席研究员是该领域的领军人物，在抗震设计的实际问题上具有丰富的经验。 这项研究将填补当前关于非线性结构行为的知识库中的一些空白，并将带来改进遭受强烈地震震动的结构的可靠设计的技术。 建议提供两年的持续资助。

This project is a coordinated effort of experimental work analysis in order to be responsive to two major problems: verification mathematical modelling and prediction of the capacity of actual structures. The emphasis of this project is placed on steel structures and components. The experimental and analytical laboratory studies to be carried out can be conveniently grouped under three main headings: (1) equipment, (2) frames, and (3) joints. These studies complement the scale field tests on existing motion earthquakes which are underway or being proposed. The study of equipment includes investigation of the failure modes supported correlation equipment response. For the steel frame study a 4' x 6' shaking table will be used to study the response due to the horizontal motion and the effects of vertical irregularity of frame stiffness. Detailed nonlinear models will be developed for selected structures. For joint study biaxial full-scale steel-moment connection tests will be conducted and compared with the analytical prediction. The investigators are all competent researchers of proven track record. The Principal Investigator is a leader in the field and is highly experienced in the practical problems of seismic-resistant design. This research will fill some of the gaps in the current knowledge base about the nonlinear structural behavior and will lead to techniques for improved reliable design of structures subjected to strong earthquake shaking. A two-year continuing grant is recommended.