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首页> 外文会议>World conference on timber engineering >CYCLIC RESPONSE OF A STRESS-LAMINATED TIMBER ARCH BRIDGE
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CYCLIC RESPONSE OF A STRESS-LAMINATED TIMBER ARCH BRIDGE

机译：应力叠层木拱桥的循环响应

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Stress-laminated timber (SLT) arch bridges combine the environmental friendliness and cost effectivity of timber with the arch shape to allow longer spans than with traditional SLT flat deck bridges. Up to now, only pedestrian bridges have been realised using this system. To extend now the use of SLT arch bridges to road bridges in forestry and rural areas, this research project studied their cyclic behaviour under heavy vehicle loads. A full scale 8m span, 1m rise and 1m wide SLT arch was built using UK-grown Douglas fir and tested in the laboratory. First a 60kN and then a 80kN concentrated cyclic load was applied at midspan of the arch and in total 96×10~ 3 load cycles have been carried out. From the recorded maximum deformation at midspan, linear models for the estimation of the residual deformation of the arch under high number of load cycles has been determined. The tests showed that after a service life of 50 years, the estimated residual deformation at midspan of the SLT arch is in the worst case about 8.3mm and therefore acceptable. SLT arch bridges suit therefore well as economical and sustainable solution for bridges on forestry roads.
机译：应力叠层木材（SLT）拱桥结合了木材的环境友好性和成本效益，其拱形比传统的SLT平板桥具有更长的跨度。到目前为止，使用该系统仅实现了人行天桥。为了将SLT拱桥的使用范围扩展到林业和农村地区的公路桥梁，本研究项目研究了它们在重型车辆负载下的循环行为。使用英国产的Douglas fir建造了一个完整的8m跨度，1m上升和1m宽的SLT拱门，并在实验室进行了测试。首先在拱的中跨施加60kN，然后施加80kN的集中循环载荷，总共进行了96×10〜3个载荷循环。根据记录的中跨最大变形，已经确定了用于估计高载荷循环次数下拱的残余变形的线性模型。测试表明，在使用50年后，SLT拱中跨的估计残余变形在最坏的情况下约为8.3mm，因此是可以接受的。因此，SLT拱桥非常适合林业道路桥梁的经济且可持续的解决方案。

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