摘要
为了解决竹管耐久性差导致原竹建筑使用寿命短、传统竹管结构的节点性能弱、现代竹管空间结构的造价高等问题,提出了由造价较低的标准紧固件连接直竹管所构成的框拼式竹管网格结构体系,所有节点仅需连接两根竹管的特征使其节点域获得了较充裕的增强空间,制作平面化的多边形框单元工艺简单,采用螺栓连接使结构成形的安装方法快捷方便,施工定位因仅需控制框单元角部的竖向坐标而极大地简化了复杂曲面结构的施工难度,且可通过原位替换劣化框单元的方法来延长结构的使用寿命。建成的柱面、球面和双曲抛物面等形式的工程,证明了该结构体系的可行性与合理性;提出了叠层和桁架两种增强型的结构形式,并采用组合构件的加载试验验证了增强形式对提高结构承载力和刚度的有效性。此外,指出了在新型结构研发中,提升生产过程的工业化水平和降低建造各环节的成本对于推广应用至关重要;建立竹管结构分析和设计理论还将面临材料非线性、几何非线性、界面接触等关键问题。
In order to address issues such as poor durability of bamboo tubes leading to a short lifespan of traditional bamboo construction,weak performance of traditional bamboo culm structural joints,and high construction costs of modern bamboo culm spatial structures,a new approach was proposed.This approach involves a frame-unit prefabricated bamboo culm lattice structure system,composed of affordable standard fasteners connected straight bamboo culms.One key feature is that all joints require only two bamboo culms to connect,providing ample reinforcement space in the joint area.The fabrication process for planar polygonal frame units is straightforward,and the use of bolted connections makes the assembly process of the structure quick and convenient.Construction positioning is greatly simplified,as it only requires control of the vertical coordinates at the corner of the frame unit,reducing the complexity of construction for complex curved structures.The lifespan of structure can be extended by replacing deteriorated frame units in situ.This system has been proven feasible and reasonable through the construction of cylindrical,spherical,and hyperbolic paraboloid form buildings.Two enhanced structural forms,stacked and truss lattice structures,were proposed,and their effectiveness in improving structural load-bearing capacity and stiffness has been demonstrated through component loading tests.It is emphasized that in the development of new structural systems,increasing the level of industrialization in the production process and reducing costs in all construction phases are crucial for widespread application.Additionally,it is noted that the establishment of bamboo culm structural analysis and design theories will face critical challenges related to material nonlinearity,geometric nonlinearity,and interface contact.
作者
卓新
董石麟
ZHUO Xin;DONG Shilin(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310007,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2024年第3期43-51,共9页
Journal of Building Structures
基金
国家重点研发计划(2017YFC0703500)。
关键词
框拼式竹管网格结构
节点形式
多边形框单元
结构安装
延长使用寿命
结构增强方法
frame-unit prefabricated bamboo culm lattice structure
joint form
polygonal frame unit
structural assembly
building service life prolongation
structural enhancement method
