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    贾苑, 乔菁, 张佳男, 刁玥, 高颖. CLT墙体-楼板T型连接件节点力学性能研究[J]. 北京林业大学学报, 2018, 40(10): 123-130. DOI: 10.13332/j.1000-1522.20180243
    引用本文: 贾苑, 乔菁, 张佳男, 刁玥, 高颖. CLT墙体-楼板T型连接件节点力学性能研究[J]. 北京林业大学学报, 2018, 40(10): 123-130. DOI: 10.13332/j.1000-1522.20180243
    Jia Yuan, Qiao Jing, Zhang Jianan, Diao Yue, Gao Ying. Mechanical performance of CLT wall-to-floor joints with T connector[J]. Journal of Beijing Forestry University, 2018, 40(10): 123-130. DOI: 10.13332/j.1000-1522.20180243
    Citation: Jia Yuan, Qiao Jing, Zhang Jianan, Diao Yue, Gao Ying. Mechanical performance of CLT wall-to-floor joints with T connector[J]. Journal of Beijing Forestry University, 2018, 40(10): 123-130. DOI: 10.13332/j.1000-1522.20180243

    CLT墙体-楼板T型连接件节点力学性能研究

    Mechanical performance of CLT wall-to-floor joints with T connector

    • 摘要:
      目的正交胶合木(CLT)较之传统的结构用工程木质材料,因其优异的材料性能使得现代木结构建筑能够向高层建筑发展。然而,现有的结构连接节点并不能完全体现CLT板材本身所具有的优异性能。对T型连接件在CLT墙体-楼板处的节点应用进行抗剪性能研究,并与角钢的连接性能进行比较,以探究T型连接件节点的可行性,为T型连接件在CLT建筑中的应用提供科学依据。
      方法分别对角钢连接节点试件、不同螺栓直径的T型连接件节点试件进行了单调加载试验。通过特征值分析法,对试验所得的荷载-位移曲线进行分析,对比不同连接节点形式下的峰值荷载、初始刚度、延性系数和耗能情况。
      结果相比传统的角钢连接节点,T型连接件节点的金属件破坏程度低,木材破坏程度高,且其峰值荷载提高了142.5%,初始刚度提高了125.0%,延性系数下降了33.2%,耗能提高了132.6%。当T型连接件节点的螺栓直径从10 mm增大到12 mm时,其峰值荷载提高了13.2%,初始刚度提高了13.7%,延性系数提高了16.2%,耗能提高了14.8%。
      结论T型连接件能更好地抵抗墙体-楼板节点的剪切力,并能更好地体现CLT自身的刚度,且T型连接件用于CLT建筑中墙板-楼板节点的力学性能总体好于角钢。对于T型连接件节点,适当增大螺栓的直径可提高其连接强度,但提高程度有限。

       

      Abstract:
      ObjectiveCLT (cross-laminated timber), compared with the traditional structural engineered wood products, is featured for its good quality which makes it possible for modern wooden buildings to break through the height limitation. However, the strength of the joint part cannot effectively utilized the capacity of CLT strength. In order to provide a scientific basis for the application of T connector in CLT building, this paper made a study of the shear performance of the T connector, and then compared it with the angle bracket used for the wall-to-floor joints.
      MethodBoth the T connector specimens and the angle bracket were tested under the monotonic loading. Based on the characteristic analysis method, peak load, initial stiffness, ductility coefficient and energy dissipation were calculated and analyzed.
      ResultCompared with the traditional angle bracket, T connector showed a lower damage degree of metal and a higher damage degree of wood part. The peak load, initial stiffness and energy dissipation of T connector increased by 142.5%, 125.0% and 132.6%, respectively, while the ductility coefficient decreased by 33.2%. When the diameter of the bolts increased from 10 to 12 mm, the peak load, initial stiffness, ductility coefficient and energy dissipation of T connector increased by 13.2%, 13.7%, 16.2% and 14.8%, respectively.
      ConclusionThe test results indicate that T connector can resist higher shear strength in the wall-to-floor joints. The mechanical propoerty of T connector is superior to angle bracket. With the increment of the diameter of bolts, it would appropriately lead to a higher mechanical performance.

       

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