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（昆明理工大學(xué)建筑工程學(xué)院， 昆明 650500）
［摘要］為研究傳統(tǒng)木結(jié)構(gòu)半榫節(jié)點在改變木材種類、改變榫頭寬度以及是否安裝黏彈性阻尼器情況下的耗能能力，用松木和杉木制作了12個不同榫頭寬度的半榫節(jié)點試件（6個未安裝黏彈性阻尼器的節(jié)點試件和6個安裝黏彈性阻尼器的節(jié)點試件），進行低周反復(fù)加載試驗，并將6個未安裝新型阻尼器的節(jié)點試件的試驗結(jié)果與6個安裝黏彈性阻尼器的節(jié)點試件的試驗結(jié)果進行對比分析。研究結(jié)果表明：各半榫節(jié)點滯回曲線均呈反“Z”形，且捏縮效應(yīng)明顯，其中寬松節(jié)點滯回曲線產(chǎn)生較大的滑移；榫頭寬度對半榫節(jié)點的骨架曲線斜率有較大影響，且增強后半榫節(jié)點推遲進入屈服階段；緊密節(jié)點初始剛度最大，隨加載的繼續(xù)，各節(jié)點剛度下降后趨于平穩(wěn)，增強后節(jié)點負(fù)向加載時剛度顯著提高；安裝黏彈性阻尼器的節(jié)點榫頭拔榫量減小，同時節(jié)點的剛度、承載力和耗能能力得到有效增強。
［關(guān)鍵詞］木結(jié)構(gòu)； 半榫節(jié)點； 黏彈性阻尼器； 耗能性能
中圖分類號：TU366-2文獻標(biāo)識碼：A文章編號：1002-848X(2021)01-0107-07
Experimental study on half mortise-tenon joints with viscoelastic dampers reinforced in traditional timber structure
NIE Yawen, TAO Zhong
(Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500， China)
Abstract:In order to study the energy dissipation capacity of the traditional timber structure half mortise-tenon joints under the condition of changing the wood type, changing the width of the mortise and with or without viscoelastic dampers, twelve half mortise-tenon joint specimens with different mortise widths (6 joint specimens without viscoelastic dampers and 6 joint specimens with viscoelastic dampers) were made from pine and Chinese fir, and the low-cycle repeated loading test was carried out. The test results of 6 joint specimens without viscoelastic dampers were compared with the test results of 6 joint specimens with viscoelastic dampers. The results show that the hysteresis curves of each mortise-tenon joint is inverse Z-shape, the rheostriction is obvious, the hysteresis curve of loose joints have larger slip; the width of the mortise has a great influence on the slope of the skeleton curve of the half mortise-tenon joint, and the enhanced half mortise-tenon joint delays to enter the yield stage. The initial stiffness of the mortise-tenon joints that extrusion between mortise and tenon is the largest, and as the loading continues, the stiffness of each joint decreases and then tends to stabilize, and the stiffness of enhanced mortise-tenon joints is significantly improved when negative loaded. The amount of mortise-tenon-out of the joints with viscoelastic dampers is reduced, and the stiffness, bearing capacity and energy dissipation capacity of the joints are effectively enhanced.
Keywords:timber structure； half mortise-tenon joint; viscoelastic damper； energy dissipation behavior
*國家自然科學(xué)基金項目(51868032)。
作者簡介：聶雅雯，碩士研究生，Email:703166537@qq.com。
