现代竹结构螺栓和螺钉连接节点研究现状

The State of the Research on Bolt and Screw Connection Joints in Engineered Bamboo Structures

工程竹结构的研究及现代竹结构体系的提出,符合我国绿色生态化可持续发展的要求。现代竹结构在不断推广应用,节点作为结构设计的核心,对结构的安全性起着至关重要的作用。对现代竹结构中连接节点的研究现状进行了总结,分析了目前现代工程竹材的发展以及在建筑结构中的实际应用,介绍目前现代竹结构连接形式中主要的螺栓和螺钉连接,其中梁柱节点主要是螺栓连接节点,螺钉连接更多应用于家具领域或工程竹材覆面板剪力墙的连接中。总结分析了螺栓连接节点的承载性能和破坏模式以及其受不同参数的影响规律,并对螺栓连接节点的承载力计算理论进行分析。根据螺钉的受力方向,对螺钉连接的握钉力和抗剪承载力的研究进行总结分析。基于对目前研究的分析得出:螺栓连接承载力与不同参数的影响规律研究相对丰富,但缺乏相应的现代竹结构规范,依据相关木结构设计规范得出的计算理论会存在一定的误差;对螺钉连接的研究相对较少,建议对螺钉连接及其梁柱节点进行深入研究,尽快制定工程竹材的相关规范。

The research of engineered bamboo structure and the proposal of modern bamboo structure system meet the requirements of green and ecological sustainable development in our country.The modern bamboo structure is continuously popularized and applied.Joint is the focus of the structural design,it plays a vital role in the safety of the structure.This paper summarized and analyzed the research status of connecting joints in modern bamboo structures.The current development of modern engineering bamboo and its practical application in building structures were analyzed.It was concluded that there were two main types of connection in modern bamboo structures:bolt or screw connection.The beam-column joints were mainly bolted joints,and screwed joints are more used in the field of furniture or the connection of shear walls sheathed with engineered bamboo panels.The bearing capacity and failure mode of bolted joints were summarized and analyzed by the influence of different parameters,and the calculation theory of bearing capacity of bolted joints was analyzed.According to the force direction of the screw,the research on the withdrawal capacity and the shear bearing capacity of the screw connection was summarized and analyzed.Based on the analysis of the current research,it is concluded that the relationship between the bearing capacity of the bolted connection and different parameters is relatively abundant.However,due to the lack of modern bamboo structure specifications,there will be certain errors in the calculation theory based on the wood structure design specifications.There are relatively few studies on screw connections.It is also recommended to conduct in-depth research on screw connections and their beam-column joints,and formulate relevant specifications for engineering bamboo.