An innovative design of jacking frames was developed for pin and hanger replacement in Robert Moses Causeway (RMC) bridge in Suffolk County, New York. The robust and efficient design of the jacking frames results in a system with improved safety, performance, constructability, and economy. A fully integrated approach for design, fabrication, and construction was employed for higher quality and efficiency. A detailed and precise 3D model was created and directly used for finite element (FE) modeling, producing contract and shop drawings, and designing of temporary work platforms. This paper provides an overview of the integrated design approach and system design, and documents the computational study for this system (global analysis, stress analysis, and large-displacement stability analysis). There are many aging steel bridges in the U.S. and abroad that have similar pin and hanger systems, and jacking frames will be needed to replace those pins and hangers when they exhaust their useful service life. The concepts and details of the jacking frames can easily be emulated by engineers for developing similar safe and robust systems for suspended truss spans and other applicable bridge structures.

在纽约萨福克县的罗伯特·摩西铜锣桥（RMC）桥梁中，开发了一种新颖的顶升框架设计，用于更换销和吊架。顶升框架的稳健而高效的设计使系统的安全性，性能，可施工性和经济性得到改善。为了提高质量和效率，采用了一种完全集成的设计，制造和构造方法。创建了详细而精确的3D模型，并将其直接用于有限元（FE）建模，生成合同和车间图纸以及设计临时工作平台。本文概述了集成设计方法和系统设计，并记录了该系统的计算研究（全局分析，应力分析和大位移稳定性分析）。美国有许多老化的钢桥 国外的销钉和吊架系统类似，当它们的使用寿命到期时，将需要顶升框架来更换这些销钉和吊架。工程师可以轻松地模拟顶升框架的概念和细节，以便为悬架桁架跨度和其他适用的桥梁结构开发类似的安全可靠的系统。