Collaborative Research: Shear-Buckling Mechanics for Enhanced Performance of Thin Plates

合作研究：增强薄板性能的剪切屈曲力学

• 批准号: 1662886
• 负责人: Maria Garlock
• 金额: $ 36.61万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2023-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1662886&HistoricalAwards=false
• 关键词: Collaborative; Research; Shear; Buckling; Mechanics

Thin steel plates are commonly used as structural elements in buildings, bridges, towers, aircrafts, etc. Due to their slenderness, these plates are susceptible to buckling under shear loading, thus limiting their capacity. The recent research shows that many existing models do not represent the true mechanics of ultimate shear buckling. This project will investigate and advance the knowledge of shear buckling response, thus leading to improved economy, durability, and safety of structures that use thin plates. The focus of this study is on steel plates, but it lays the foundation for other materials such as aluminum and composites that can be considered in future work. This project also addresses the grand challenges recently issued by the American Society of Civil Engineers (ASCE): (a) significantly enhance the performance and value of infrastructure projects over their life cycles by 2025, and (b) foster the optimization of infrastructure investments for society. The results will increase cost efficiency via decreased material usage; enhance robustness via increased ultimate shear strength; and reduce occurrence of buckling and increased resilience to unexpected loads (e.g. with fewer required repairs) via increased buckling load capacity. The overall objective of this project is to comprehensively investigate the mechanics of shear buckling behavior in steel plates, thus leading to (a) new predictive models that capture the true mechanics, and (b) design modifications that increase economy, robustness, and life-cycle performance. The research plan involves both nonlinear finite element studies and experimental tests. A detailed examination of the stress patterns and load redistribution from the elastic buckling stage to the ultimate postbuckling capacity will be the primary focus. Physical tests will explore new panel configurations, and potential material optimizations will be identified based on finite element mechanics studies. Experiments will be conducted using facilities at Lehigh University to examine the shear buckling performance of steel plate girder specimens, both with and without bending moment. The data from these tests will be used to directly validate the computational modeling approaches.

薄钢板通常用作建筑物、桥梁、塔、飞机等的结构元件。由于其细长，这些板在剪切载荷下容易屈曲，从而限制了其承载能力。 近年来的研究表明，现有的许多模型并不能反映极限剪切屈曲的真实机理。本项目将调查和提高剪切屈曲响应的知识，从而提高使用薄板的结构的经济性、耐久性和安全性。 这项研究的重点是钢板，但它为未来工作中可以考虑的其他材料，如铝和复合材料奠定了基础。 该项目还解决了美国土木工程师协会（ASCE）最近发布的重大挑战：（a）到2025年，在其生命周期内显着提高基础设施项目的性能和价值，以及（B）促进社会基础设施投资的优化。 结果将通过减少材料使用来提高成本效率;通过增加极限剪切强度来增强鲁棒性;并且通过增加屈曲载荷能力来减少屈曲的发生并增加对意外载荷的弹性（例如，需要较少的维修）。本项目的总体目标是全面研究钢板剪切屈曲行为的力学机制，从而导致（a）新的预测模型，捕捉真正的力学，（B）设计修改，提高经济性，鲁棒性和生命周期性能。 研究计划包括非线性有限元研究和实验测试。 从弹性屈曲阶段到极限后屈曲承载力的应力模式和载荷重分布的详细检查将是主要的重点。 物理测试将探索新的面板配置，并将根据有限元力学研究确定潜在的材料优化。 将利用利哈伊大学的设施进行实验，以检查钢板梁试样的剪切屈曲性能，包括有弯矩和无弯矩。来自这些测试的数据将用于直接验证计算建模方法。

项目成果

Post-buckling shear resistance of slender girder webs: Stiffener participation and flange contributions

细长梁腹板的屈曲后抗剪强度：加劲肋参与和翼缘贡献

• DOI: 10.1016/j.jcsr.2021.107117
• 发表时间: 2022
• 期刊: Journal of Constructional Steel Research
• 影响因子: 4.1
• 作者: Augustyn, Kevin E.;Quiel, Spencer E.;Garlock, Maria E.M.
• 通讯作者: Garlock, Maria E.M.

Postbuckling Mechanics of a Square Slender Steel Plate in Pure Shear

纯剪切下方形细长钢板的后屈曲力学

• 发表时间: 2019
• 期刊: Engineering journal
• 作者: Garlock, M.E.M

Postbuckling mechanics in slender steel plates under pure shear: A focus on boundary conditions and load path

纯剪切下细长钢板的后屈曲力学：重点关注边界条件和载荷路径

• DOI: 10.1016/j.tws.2021.108448
• 发表时间: 2021
• 期刊: Thin-Walled Structures
• 影响因子: 6.4
• 作者: Wang, Peter Y.;Masungi, Parfait M.;Garlock, Maria E.M.;Quiel, Spencer E.
• 通讯作者: Quiel, Spencer E.

Formation of post-buckling shear mechanisms in stiffened web panels of slender steel plate girders

细长钢板梁加筋腹板后屈曲剪切机制的形成

• 发表时间: 2023
• 期刊: Thin-Walled Structures
• 影响因子: 6.4
• 作者: Augustyn, K.A.;Quiel, S.E.;Garlock, M.E.M.
• 通讯作者: Garlock, M.E.M.

Low-frequency sinusoids for enhanced shear buckling performance of thin plates

• DOI: 10.1016/j.jcsr.2020.106475
• 发表时间: 2021-02
• 期刊: Journal of Constructional Steel Research
• 影响因子: 4.1
• 作者: Peter Y. Wang;M. Garlock;T. Zoli;S. Quiel