钢-混凝土组合桥面板滑移及掀起效应研究
首发时间:2012-11-22
摘要:进行了承受负弯矩作用下的钢-混凝土组合桥面板的全过程试验研究,界面剪力连接采用PBL剪力连接件。为了对混凝土的开裂、钢与混凝土界面之间的滑移及掀起效应开展测试研究,在应力应变测试环节开展了光纤光栅的测试工作。研究结果表明,光纤光栅传感器能较准确地观测到开裂荷载,且与应变片测试结果吻合较好;对于普通应变片难以观测的滑移和掀起效应,光纤光栅传感器均表现出较强的优越性,研究结果可以为同类研究提供一定借鉴和参考。
关键词: 桥梁工程 钢-混凝土组合桥面板 开裂 滑移 掀起 光纤光栅技术
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Analyses the Slip and Uplift of Steel-Concrete Composite Slab
Abstract:The experimental test processes have been studied on the steel-concrete composite slab, in which the connector between the steel girder and the concrete slab was perfond strip. In order to test the crack in the concrete, the slip and uplift between the steel girder and concrete slab etc, a Fiber Bragg Grating(FBG) sensing system was researched during the experiment. The test conclusions show that the crack in the concrete was tested exactly by the Fiber Bragg Grating sensing technology, which was also agree well with the results of strain gauge. The slip and uplift between the steel girder and the concrete slab was not easy be caught by the strain gauge, but the Fiber Bragg Grating sensing technology got better achievements in the same test condition. Reference is made from the tentative research work for other researchers.
Keywords: Bridge engineering Steel-concrete composite slab Crack Slip Uplift Fiber Bragg Grating sensing technology
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