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(中鐵建恒誠實(shí)業(yè)有限公司, 珠海 519030)
摘要: 新型梁柱榫卯節(jié)點(diǎn)是一種能夠進(jìn)行標(biāo)準(zhǔn)化生產(chǎn)、裝配化施工、實(shí)現(xiàn)木結(jié)構(gòu)建筑全榫卯連接的新型節(jié)點(diǎn)形式. 通過使用機(jī)械臂對該榫卯節(jié)點(diǎn)進(jìn)行自動化加工制作,從而實(shí)現(xiàn)該類榫卯木結(jié)構(gòu)建筑的工業(yè)化生產(chǎn)、智能化建造. 為了探究該新型節(jié)點(diǎn)的受力性能,對其十字形梁柱榫卯節(jié)點(diǎn)進(jìn)行單調(diào)加載試驗(yàn),研究該節(jié)點(diǎn)的承載能力、破壞模式、剛度以及變形性能. 采用數(shù)值模擬的方法對榫卯節(jié)點(diǎn)進(jìn)行仿真分析,所得模擬結(jié)果與試驗(yàn)結(jié)果吻合較好.研究結(jié)果表明:節(jié)點(diǎn)榫頭主要橫紋受壓,受力屈服后變形明顯,而卯口順紋受壓變形較小,節(jié)點(diǎn)最終破壞形式為榫頭拔出,在薄弱截面處發(fā)生彎曲破壞,柱身和梁身基本完好. 在此基礎(chǔ)上,建立了單梁組成的 T 形梁-柱節(jié)點(diǎn)精細(xì)化有限元分析模型,研究梁柱節(jié)點(diǎn)中榫頭朝向?qū)?jié)點(diǎn)初始剛度、強(qiáng)度以及延性的影響. 結(jié)果表明,榫頭凹面朝下初始剛度較大,可以有效提高節(jié)點(diǎn)的強(qiáng)度和延性.
關(guān)鍵詞: 木結(jié)構(gòu); 榫卯節(jié)點(diǎn); 單調(diào)加載試驗(yàn); 承載能力
中圖分類號:TU366. 2 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2023)08-0125-07
DOI:10. 19701 / j. jzjg. 20211288
Monotonic loading experimental study on new type of wooden beam-column mortise-tenon joint
LIU Long
(China Railway Jianheng Honesty Industry Co. , Ltd. , Zhuhai 519030, China)
Abstract: The new beam-column mortise-tenon joint is a new type of joint which can carry out standardized production,assembly construction and realize full mortise-tenon connection of wooden structure buildings. By using the robotic arm toautomatically process the mortise-tenon joints, so as to realize the industrial production and intelligent construction of suchmortise-tenon wooden structure buildings. In order to explore the mechanical performance of the new joint, a monotonicloading test was carried out on the cross beam-column mortise-tenon joints to study the bearing capacity, failure mode,stiffness and deformation performance of the joint. The numerical simulation method was used to simulate the mortise tenonjoints, and the simulation results are in good agreement with the experimental results. The results show that the jointsmortise are mainly subjected to transverse tenon compression, and the deformation is obvious after yielding under force,while the deformation of the mortise is small along the grain. The final failure mode of joints is that the tenons are pulledup, bending failure occurs at the weak section, and the column and beam are basically intact. On this basis, a refinedfinite element analysis model of T-shaped beam-column joints composed of single beams was established to study theinfluence of mortise orientation on initial stiffness, strength and ductility of the joint. The results show that the initialstiffness of the tenon concave downwards is larger, which can effectively improve the strength and ductility of the joint.
Keywords:wooden structure; mortise-tenon joint; monotonic loading test; load-bearing capacity
作者簡介:劉龍,碩士,高級工程師,主要從事建筑工程領(lǐng)域技術(shù)與管理,Email:1169968422@ qq. com.
[引用本文] 劉龍. 新型梁柱榫卯節(jié)點(diǎn)單調(diào)加載試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),2023,53 ( 8):125-131. LIU Long.Monotonic loading experimental study on new type of wooden beam-column mortise-tenon joint[ J]. Building Structure,2023,53(8):125-131.
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