Metallic Tubular Energy Dissipators in Frames Subjected To Cyclic Loading

这项拨款是根据“小说研究加速奖”， 探索金属管作为循环能源的可行性 建筑框架中的消能装置， 与严重的横向载荷条件相关。 实验 并将包括一个分析阶段。 在实验 在本研究的第一阶段，将准备比例模型框架， 承受循环载荷条件。 框架和能量 将在散热管上安装应变计， 应变水平随时间的变化。 框架实验的主要目标是跟踪 金属管的屈服和耗能特性 当它们连接到承受横向载荷的框架上时 条件 目标将是开发结构框架系统 具有以下两个特点：1）屈服/能量 耗散在管中发生在任何塑性变形之前很久 在框架的主要结构构件中开始。（二） 使消能管屈服并不伴随着 框架的横向刚度显著降低。 的 这项任务的分析阶段将涉及开发和 验证计算机软件（ABAQUS）预测的动态 钢管消能工框架结构的动力响应 循环加载 如果可行，结构布置可能会导致负载 承载保持在弹性范围内的主结构构件， 从而消除对建筑物的重大损害。

This grant is made under "Expedited Awards for Novel Research" to explore the feasibility of using metallic tubes as cyclic energy dissipators in building frames to dissipate most of the energy associated with severe lateral loading conditions. An experimental and an analytical phase will be included. During the experimental phase of this research, scale model frames will be prepared and subjected to cyclic loading conditions. The frames and energy dissipating tubes will be instrumented with strain gages to measure levels of strains as functions of time. The primary objective of the frame experiments will be to track the yielding and energy dissipation characteristics of the metallic tubes when they are attached to frames subjected to lateral loading conditions. The goal will be to develop structural framing systems possessing the following two characteristics: 1) Yielding/energy dissipation occurs in the tubes long before any plastic deformations are initiated in the primary structural members of the frame. 2) Yielding the energy dissipating tubes is not accompanied by a significant reduction in lateral stiffness of the frame. The analytical phase of this task will involve the development and verification of computer software (ABAQUS) to predict the dynamic response of frames equipped with tubular energy dissipators under cyclic loading. If feasible, a structural arrangement could result in load carrying main structural members remaining in the elastic ranges, thereby eliminating major damage from occurring to the building.