GOALI/RUI: Development of Innovative New Highway Bridge System

在这项调查中，一个创新的和无腐蚀的上承式灯泡T梁桥系统将进行研究。新的并排上承式球头-T形梁桥系统包括（a）上承式球头-T形梁，采用非腐蚀性钢绞线（碳纤维增强聚合物，CFRP）进行预应力和加固;（B）整体横隔板，采用无粘结CFRP进行后张拉;以及（c）整体磨损表面。这项调查包括一些阶段，将进行四个全尺寸的桥面球T梁和一个桥梁模型。将确定新梁的使用荷载、开裂荷载和极限承载力。最后，将对所开发的上承式球鼻T梁桥体系进行测试和评估。通过对上承式球鼻T梁桥的有限元分析，认为采用新型CFRP与高强混凝土相结合的结构体系，可以提高上承式球鼻T梁桥的承载力、耐久性和使用寿命，并降低维护成本。引进这一创新的桥梁系统将提供一个具有成本效益的基础设施系统，以满足美国？现在和未来的需求。与复合材料和建筑行业以及与国家工程师和混凝土预制工的互动将对公路桥梁行业和LTU学生产生重大影响。该项目需要多学科研究，涉及新材料、结构工程、仪器仪表、荷载分析、计算机模拟、施工和桥梁经济学。

In this investigation, an innovative and corrosion free decked bulb-T beam bridge system will be studied. The new side-by-side decked bulb-T beam bridge system consists of (a) decked bulb-T beams prestressed and reinforced with non-corrosive strands (carbon fiber reinforced polymer, CFRP), (b) integral transverse diaphragms post-tensioned with unbonded CFRP, and (c) an integral wearing surface. This investigation consists of a number of phases that will be carried out on four full-scale decked bulb-T beams and on one bridge model. Service load, cracking load and ultimate load carrying capacity of the new beams will be determined. Finally, the developed decked bulb-T beam bridge system will be tested and evaluated. A comprehensive finite element analysis will be conducted.The combination of newly developed CFRP with high strength concrete in the decked bulb-T beam bridge system will enhance its capacity, durability, and life-span as well as reduce the cost of maintenance. Introduction of this innovative bridge system will deliver a cost-effective infrastructure system to meet America?s present and future needs. Interaction with composite and construction industries as well as with state engineers and concrete precasters will be a significant benefit to the highway bridge industry and to LTU students. This project requires multidisciplinary research, in new materials, structural engineering, instrumentation, load analysis, computer simulation and construction and bridge economics.