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阐述了一种新型木结构桥梁节点连接装置。该装置利用拉-压特性,使节点连接具有滑动适应性,成功解决了木结构桥梁节点分析中的难点。小直径木材(Small Diameter Timber,SDT)具有可预知的自然生长特性和易于计算机模拟分析,促进了木结构全面应用于轻型预应力节段拼装拱桥(Light Prestressed Segmented Arch,LPSA)。滑动自适应节点可通过内在刚体的无害变形来耗散能量。因此,LPSA结构本身就有抵抗地震、飓风和洪水的能力。在全球环境持续恶化的今天,LPSA结构为可持续发展工程的设计和创新研究提供了一个总体框架。SDT是一种储量巨大的可再生资源,用作建筑材料不仅可以保护现存的全球森林资源,而且有利于人类的可持续发展。SDT抗腐蚀性强,抗压强度是混凝土的2～3倍,目前已经采用SDT建成了2座跨径为19.5 m的LPSA桥梁。
A new type of wood bridge connection device is described. The device utilizes the pull-pressure characteristic, makes the connection of the nodes have the sliding adaptability, and successfully solves the difficulties in the analysis of the wood bridge nodes. Small Diameter Timber (SDT) with predictable natural growth characteristics and ease of computer simulation facilitate the full application of wood structures to Light Prestressed Segmented Arch (LPSA) arch bridges. Sliding adaptive nodes dissipate energy by innocuous deformation of the inner rigid body. Therefore, the LPSA structure itself has the ability to resist earthquakes, hurricanes and floods. As the global environment continues to deteriorate, the LPSA structure provides an overarching framework for the design and innovation of sustainable development engineering. SDT is a huge renewable resource. As a building material, SDT can not only protect the existing global forest resources, but also contribute to the sustainable development of human beings. SDT has strong corrosion resistance and compressive strength is 2 to 3 times that of concrete. So far, 2 LPSA bridges with a span of 19.5 m have been built with SDT.