BRIGE: Innovative Connection Design for Enhanced Seismic Performance of Low to Mid-Rise Steel Frames

该奖项根据 2009 年美国复苏和再投资法案（公法 111-5）提供资金。该 BRIGE 奖项的研究目标是利用空心结构截面 (HSS) 梁和柱构件的卓越压缩、弯曲和扭转特性，为高地震活动地区的中低层钢框架开发新的连接细节。 将通过全面的实验研究来探索高速钢梁构件在弯曲下的行为，以确定塑性铰形成的限制参数。 这些测试的数据将为详细模型提供基础，这些模型可以准确捕获弯曲下的全局和局部行为，并提供一种识别合适的连接配置和设计细节的方法。 这些模型的进一步完善将通过专注于局部屈曲和焊接行为的小规模测试来实现。 通过数值分析，将具有已确定的 HSS 连接的框架系统的地震响应与具有传统连接细节的框架系统进行比较。 HSS 弯矩连接的其他数值研究将考虑使用创新的补充能量耗散材料来进一步增强其抗震性能。如果成功，这项研究的结果将为利用 HSS 构件设计弹性且坚固的低至中层弯矩框架结构提供知识库。 加深对 HSS 构件的整体弯曲、局部和焊接行为的了解将直接使钢结构设计界受益，并有助于提高地震高发地区社区的福利和安全。材料、结构和自然灾害之间的相互作用为扩大代表性不足的学生的参与提供了独特的背景。 K-12 推广计划以及大学层面代表性不足群体参与从分析模型到大规模结构测试的各个方面，将成为促进数学、科学和工程领域代表性不足群体持续参与和兴趣的催化剂。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The research objective of this BRIGE award is to develop new connection details utilizing the superior compression, bending, and torsion properties of hollow structural section (HSS) beam and column members for low to mid-rise steel frames in areas of high seismicity. The behavior of HSS beam members under bending will be explored through full-scale experimental studies to determine limiting parameters for plastic hinge formation. The data from these tests will provide the basis for detailed models that can accurately capture global and local behavior under bending and provide a means to identify suitable connection configurations and design details. Further refinement of these models will be achieved through small-scale tests focused on local buckling and weld behavior. The seismic response of frame systems with the identified HSS connections will be compared to those with conventional connection detailing through numerical analyses. Additional numerical studies of the HSS moment connections will consider the use of innovative supplemental energy dissipation materials to further enhance their seismic performance.If successful, the results of this research will provide a knowledge base for the design of resilient and robust low to mid-rise moment frame structures utilizing HSS members. The increased understanding of the global bending, local, and weld behavior of HSS members will directly benefit the steel design community and help to enhance the welfare and safety of communities in areas of high seismicity. The interaction between materials, structures, and natural hazards provides a unique context in which to broaden participation of underrepresented students. K-12 outreach programs and involvement of underrepresented groups at the university level in everything from analytical modeling to large-scale structural testing will act as a catalyst to foster continued participation and interest of underrepresented groups in the math, science, and engineering fields.