安装偏差对胶合木梁柱植筋节点受力性能影响
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作者单位:

1.青岛理工大学 土木工程学院;2.重庆长厦安基建筑设计有限公司青岛分公司;3.青岛市即墨区古城发展服务中心

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中图分类号:

TU375.4

基金项目:

国家重点研发计划项目(2017YFC0703506)


The influence of installation deviation on the mechanical performance of glulam beam-column glued-in rods joints
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Affiliation:

1.College of Civil Engineering,Qingdao University of Technology;2.ARCH-AGE DESIGN;3.Jimo District Ancient City Development Service Center

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    摘要:

    胶合木植筋节点在加工和安装方面通常会存在些许缺陷和误差,而植筋节点的设计和施工目前尚无标准可循,因此本文着眼于含加工缺陷在内的安装偏差对该类节点受力性能影响,旨在明确安装偏差的允许范围。基于理论计算方法初步校核所设计的节点受力性能后,首先进行有、无安装偏差节点的有限元分析,随后同有安装偏差的试验结果进行对比,并运用考虑胶层开裂的有限元分析方法确定安装偏差限值。结果表明:有安装偏差节点的承载力有所下降;试验中试件的破坏形态主要为植入钢筋屈服、植筋孔洞周围木材破坏及木柱顺纹方向开裂;有限元分析时若能反映安装偏差和胶层开裂,则分析结果与试验吻合度较高;安装偏差控制在10mm~25mm以内时,相对于通常预留间隙10mm时的节点模型,承载力的降低幅度低于5%。

    Abstract:

    There are usually some defects and deviations in manufacturing and installation of glulam glued-in rods joints, and there is currently no standard to follow for the design and construction of joints. Therefore, this paper focuses on the influence of installation deviation including manufacturing defect on the mechanical performance of such joints, aiming to clarify the allowable range of installation deviation. Based on the theoretical calculation method to check the mechanical properties of the designed joints, firstly, the finite element analysis of the joints with and without installation deviation was carried out, then the finite element analysis of the joints with installation deviation was compared with the experimental results, and the limit value of installation deviation was determined by using the finite element analysis method considering the cracking of rubber layer. The results show that: the bearing capacity of joints with installation deviations has decreased; the failure modes of the specimens in the test are mainly the yield of the implanted steel bars, the damage of the wood around the reinforcement holes and the cracking of the wood columns along the grain direction. If the installation deviation and adhesive cracking can be reflected in the finite element analysis, the analysis results are in good agreement with the test. When the installation deviation is controlled within 10mm~25mm, the bearing capacity of the joint model is reduced by less than 5% compared to the joint model with the usual reserved gap of 10mm.

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  • 收稿日期:2021-09-24
  • 最后修改日期:2021-11-17
  • 录用日期:2021-11-19
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