安装偏差对胶合木梁柱植筋节点受弯承载力的影响

胶合木植筋节点在加工和安装时通常会存在些许缺陷和误差，且植筋节点的设计和施工目前尚无标准可循。为了研究含加工缺陷在内的安装偏差对该类节点受弯承载力的影响，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节点的梁端抗弯承载力，然后进行有、无安装偏差节点的有限元分析，并与有安装偏差的试验结果进行对比，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：有安装偏差节点的梁端抗弯承载力有所下降；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；有限元分析时考虑安装偏差和胶层开裂，则分析结果与试验吻合度较高；相对于通常预留间隙10 mm的节点模型，安装偏差控制在10~25 mm以内时，受弯承载力的降低幅度低于5%。

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

There are usually some defects and deviations in the 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 defects on the flexural capacity of such joints, aiming to clarify the allowable range of installation deviation. Based on the theoretical calculation method to check the beam end flexural bearing capacity 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 beam end flexural 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 results. When the installation deviation is controlled within 10~25 mm, the flexural bearing capacity of the joint model is reduced by less than 5% compared to the joint model with the usual reserved gap of 10 mm.