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首页> 外文期刊>Journal of bridge engineering >Fatigue Evaluation of Transverse U-Bar Joint Details for Accelerated Bridge Construction
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Fatigue Evaluation of Transverse U-Bar Joint Details for Accelerated Bridge Construction

机译:加速桥施工中U形横杆接头细节的疲劳评估

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摘要

When precast full-depth deck panels and/or decked bulb-Ts (DBTs) are used for accelerated bridge construction, transverse joints exist. In this study, continuous transverse U-bar joint details, which can provide negative moment continuity in multispan bridges, have been investigated. Four full-scale specimens connected by the developed U-bar detail together with the selected closure-pour (CP) materials, overnight cure and seven-day cure, were tested. Static and fatigue tests under tension loading were conducted. The loading demand necessary in the testing was determined based on the maximum forces in the transverse joint from an analytical study. Test results were evaluated based on tension capacity, cracking, and steel strain. Based on these test results, the developed transverse U-bar joint detail is a promising connection system.
机译:当预制的全深度甲板面板和/或甲板式T型管(DBT)用于加速桥梁施工时,存在横向缝。在这项研究中,已经研究了可以在多跨桥中提供负力矩连续性的连续横向U型杆接头细节。测试了四个通过展开的U型杆细节连接的满量程标本,以及所选的封闭浇注(CP)材料,隔夜固化和7天固化。在张力载荷下进行了静态和疲劳测试。测试中必要的载荷需求是根据分析研究得出的横向接头的最大力确定的。根据抗拉能力,开裂和钢应变评估测试结果。根据这些测试结果,开发的横向U型杆接头细节是一个很有前途的连接系统。

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