Shear-Yielding Moment-Resistant Steel Frames: Analytical and Experimental Investigations

9812465 Aschheim在这个项目中的分析和实验研究，以确认基本概念，并探讨各种潜在的机制和使用普通和蜂窝钢梁的可行性。 分析研究将测试目前的假设应力分布和尺寸标准，并将探讨各种可实现的机制下，循环横向载荷和重力载荷使用非弹性有限元分析。 这些研究还将有助于定义测试样本及其预期行为。 实验研究将确定剪切屈服可以保护梁柱连接免受过应力，并将研究受材料性能和稳定性限制的梁的变形能力。 普通梁和蜂窝梁将在腹板上有圆形和六边形开口进行试验。 测试设置将类似于SAC程序中使用的设置。 这项研究的结果将建立建议的抗剪屈服弯矩框架系统的可行性，并将提供一个初步的基础，建立设计标准。 简支梁的试验结果表明，所提出的钢框架系统将具有成本竞争力，并具有非凡的延性。 抗横向载荷系统的这种额外的性能增强允许层高降低10%至20%，从而实现材料和建筑成本的进一步经济。 这是CMS-INT联合倡议NSF 98-30“美日城市地震减灾合作研究”第一轮（FY'98）竞赛的一个项目。 ***

9812465 Aschheim In this project analytical and experimental studies to confirm the basic concepts and to explore the viability of various potential mechanisms and the use of ordinary and castellated steel beams. The analytical studies will test current hypotheses for stress distributions and sizing criteria, and will explore various attainable mechanisms under cyclic lateral loading with and without gravity loads using inelastic finite element analyses. These studies will also help in defining test specimens and their expected behavior. Experimental studies will establish that shear yielding can protect the beam-column connection from overstress, and will investigate the deformability of the beams as limited by material properties and stability. Ordinary and castellated beams will be tested having circular and hexagonal openings in the web. Test setups will resemble those used in the SAC program. Results from this research will establish the viability of the proposed shear-yielding moment-resistant frame system, and will provide an initial basis for establishing design criteria. Test results from simple beams suggest that the proposed steel frame system will be cost competitive and possess extraordinary ductility. This additional performance enhancement of the lateral- load resisting-system permits story heights to be reduced by 10 to 20%, thereby achieving further economy in material and construction costs. This is a project under the first round (FY'98) competition of joint CMS-INT initiative NSF 98-30 "US-Japan Cooperative Research In Urban Earthquake Disaster Mitigation". ***