Strength Evaluation and Retrofitting of R/C Pinned Bridge Pier/Footing Connections

遥控销轴桥墩/基础连接的强度评估与改造

• 批准号: 9612186
• 负责人: David Sanders
• 金额: $ 15.04万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612186&HistoricalAwards=false
• 关键词: Strength; Evaluation; Retrofitting; Pinned; Bridge

9612186 Sanders Reinforced concrete hinges are frequently used at the base of bridge columns to release moment transfer in one or both principal directions. Hinged column bases are used throughout the country for reducing foundation forces for thermal/shrinkage loads and other loads in the direction of the hinge. The proposed study will investigate strength evaluation and retrofitting of reinforced concrete pinned bridge pier to footing connections. The project is an experimental study with ten 1/2-scale specimens. The research will study the effects of axial load, develop and test retrofit details, and determine the shear strength capacity in the weak axis direction under large cyclic rotations. The design, retrofit, and repair recommendations will provide designers with a methodology from which to evaluate and design one-way hinges in piers. ***

9612186桑德斯钢筋混凝土铰链常用于桥梁柱的底部，以释放一个或两个主方向的力矩传递。铰接柱基础在全国范围内用于减少铰链方向的热/收缩载荷和其他载荷的基础力。提出的研究将探讨钢筋混凝土钉桥墩与基础连接的强度评估和改造。该项目是一个实验研究，有10个1/2比例的标本。本研究将研究轴向荷载的影响，制定和试验改造细部，确定大循环旋转下弱轴方向的抗剪强度能力。设计、改造和维修建议将为设计师提供一种评估和设计桥墩单向铰链的方法。＊＊＊