Design of Ultrahigh-Performance Concrete Waffle Deck for Accelerated Bridge Construction
Design of Ultrahigh-Performance Concrete Waffle Deck for Accelerated Bridge Construction
复制标题
用于加速桥梁施工的超高性能混凝土华夫式桥面板设计
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Sritharan
中科院分区：
文献类型：
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作者：
Sriram Aaleti;S. Sritharan
作为FHWA Highways for LIFE项目资助的创新项目的一部分，开发了一种全深度预制超高性能混凝土（UHPC）华夫桥面板和适合于华夫桥面现场实施的适当连接件。在实验室条件下，对由两个面板和三种连接方式组成的单元进行了成功的全尺寸验证测试后，将华夫板安装在爱荷华州瓦佩洛县的一座替代桥梁上。随后的荷载测试证实了UHPC格构式桥面桥的理想性能。根据已完成项目的经验教训和一系列简单而详细的格构式桥面板有限元分析结果，开发了一个设计指南，以帮助扩大UHPC格构式桥面板在新建和现有桥梁中的设计和安装成本效益。本文介绍了指南中介绍的用于新建桥梁的格构式桥面板设计。为了最大限度地降低这种新桥面系统的成本，提供了有关最大肋间距和简化连接的信息，沿着桥面板的正弯矩和负弯矩设计。
As part of an innovation project funded by the FHWA Highways for LIFE program, a full-depth precast, ultrahigh-performance concrete (UHPC) waffle deck panel and appropriate connections suitable for field implementation of waffle decks were developed. After a successful full-scale validation test on a unit consisting of two panels with three types of connections under laboratory conditions, the waffle deck was installed on a replacement bridge in Wapello County, Iowa. The subsequent load testing confirmed the desirable performance of the UHPC waffle deck bridge. With lessons from the completed project and outcomes from a series of simple and detailed finite element analyses of waffle decks, a design guide was developed to help broaden the design and installation of the UHPC waffle deck panel cost-effectively in new and existing bridges. This paper describes the waffle deck design introduced in the guide as it is applied to new bridges. To minimize the cost of this new bridge deck system, information on maximum rib spacing and simplified connections, along with the design of the deck panel for positive and negative moments, is presented.