- 摘 要
-
（1 上海市建筑科學(xué)研究院有限公司 上海市工程結(jié)構(gòu)安全重點(diǎn)實(shí)驗(yàn)室， 上海 200032； 2 中國建筑西南設(shè)計(jì)研究院有限公司， 成都 610000）
［摘要］針對膠合木梁柱鋼填板螺栓節(jié)點(diǎn)轉(zhuǎn)動時(shí)螺栓孔壁處木材易劈裂的問題，研究了外包鋼板和內(nèi)貼重組竹板增強(qiáng)節(jié)點(diǎn)的力學(xué)性能。進(jìn)行了對比節(jié)點(diǎn)試件、內(nèi)貼重組竹板增強(qiáng)節(jié)點(diǎn)試件以及兩種外包鋼板增強(qiáng)節(jié)點(diǎn)試件的低周反復(fù)加載試驗(yàn)，研究了4種節(jié)點(diǎn)試件的破壞模式、承載力、變形能力、耗能能力和剛度退化性能。結(jié)果表明，外包鋼板和內(nèi)貼重組竹板增強(qiáng)能夠有效提升節(jié)點(diǎn)的承載力和變形能力；外包鋼板增強(qiáng)節(jié)點(diǎn)的耗能能力得到顯著提升，尤以鋼板對梁側(cè)亦有約束的S2組試件節(jié)點(diǎn)更為顯著，在主循環(huán)位移幅值分別為1-0Δ，1-5Δ和2-0Δ時(shí)，外包鋼板增強(qiáng)S2組試件的耗能量較對比U組試件分別提高220%，349%，176%；幾種增強(qiáng)方案均能提升節(jié)點(diǎn)的早期抗側(cè)剛度，而內(nèi)貼重組竹板增強(qiáng)能夠在大變形階段有效改善節(jié)點(diǎn)剛度的退化。
［關(guān)鍵詞］膠合木框架結(jié)構(gòu)； 鋼填板螺栓節(jié)點(diǎn)； 重組竹； 鋼板； 滯回性能
中圖分類號：TU366-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)05-0007-08
Experimental study on reinforced glued timber beam-column joint with outer encased steel plate and inner bonded bamboo scrimber
Leng Yubing1, Xu Qingfeng1, Long Weiguo2
(1 Shanghai Key Laboratory of Engineering Structure Safety, SRIBS, Shanghai 200032, China; 2 China Southwest Architectural Design and Research Institute Corp. Ltd., Chengdu 610000, China)
Abstract:In view of the problem that the timber is easy to split at the bolt hole wall when the glued timber beam-column steel plate bolt joint is rotating, the mechanical properties of the joint strengthened by the outer encased steel plate and the inner bonded bamboo scrimber were studied. The low cycle repeated tests were conducted on the comparison joint specimen, the reinforced joint with the inner bonded bamboo scrimber and the joints reinforced with two kinds of encased steel plates, to study the failure mode, bearing capacity, deformation capacity, energy dissipation capacity and stiffness degradation performance of four kinds of joint specimens. The results show that the load-carrying capacity and deformation capacity of the joint can be effectively improved by the reinforcement of the outer encased steel plate and the inner bonded bamboo scrimber; the energy dissipation capacity of the joint can be significantly improved by the outer encased steel plate, and in particular, the energy dissipation capacity of S2 group of specimens with steel plates restraining the beam side is significantly increased; when the main cyclic displacement amplitude is 1-0Δ, 1-5Δ and 2-0Δ respectively, the energy dissipation capacity of the S2 group of specimens enhanced by the outer encased steel plate is increased by 220%, 349% and 176% when compared with that of the U group of specimens; and the early lateral stiffness of the joints can be improved by several strengthening schemes, while the inner bonded bamboo scrimber reinforcement can effectively improve the degradation of the joint stiffness in the stage of large deformation.
Keywords:glued timber frame structure; steel plate bolt joint; bamboo scrimber; steel plate; hysteretic performance
*上海市青年科技啟明星計(jì)劃（19QB1405100），國家自然科學(xué)基金（51978402）。
通訊作者：許清風(fēng)，博士，教授級高級工程師，Email: xuqingfeng73@163.com。
- 下載地址
-
