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

在这个项目中，分析和实验研究证实了基本概念，并探索了各种潜在机制的可行性，以及普通和城堡式钢梁的使用。分析研究将测试当前关于应力分布和尺寸标准的假设，并将使用非弹性有限元分析探索在有重力载荷和没有重力载荷的循环横向载荷下可实现的各种机制。这些研究也将有助于确定试验标本及其预期行为。实验研究将建立剪切屈服可以保护梁-柱连接免受过大应力，并将研究受材料性能和稳定性限制的梁的变形能力。普通梁和城形梁将在腹板上进行圆形和六角形开口的测试。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所提出的抗剪屈服弯矩框架系统的可行性，并将为建立设计准则提供初步基础。简单梁的试验结果表明，所提出的钢框架体系将具有成本竞争力，并具有非凡的延性。这种抗侧载系统的额外性能增强使楼层高度降低了10%至20%，从而进一步节省了材料和建筑成本。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（1998财年）竞赛下的一个项目。＊＊＊

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". ***