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(1 北京建筑大學(xué)北京未來城市設(shè)計(jì)高精尖創(chuàng)新中心， 北京 100044；2 大連理工大學(xué)土木工程學(xué)院， 大連 116024；3 山東艾科福建筑科技有限公司， 煙臺(tái) 264006； 4 煙臺(tái)大學(xué)土木工程學(xué)院， 煙臺(tái) 264005)

［摘要］通過對(duì)3個(gè)不同榫卯構(gòu)造的試件開展直剪試驗(yàn)，研究了榫卯構(gòu)造對(duì)接縫受力性能的影響。結(jié)果表明，榫卯接縫構(gòu)造合理，整體性良好；水平連接鋼筋伸入榫卯接縫凹槽內(nèi)長(zhǎng)度為10倍鋼筋直徑時(shí)，在試件達(dá)到峰值荷載前水平連接鋼筋受拉屈服，未出現(xiàn)滑移或錨固失效跡象；榫卯構(gòu)造對(duì)榫卯接縫受力性能影響顯著，增大縱向孔洞截面可提高開裂荷載、開裂位移和峰值位移，但降低了接縫剛度；當(dāng)榫卯接縫縱向孔洞內(nèi)側(cè)與橫向凹槽底部在同一平面時(shí)，增大縱向孔洞截面對(duì)承載力影響較小。

［關(guān)鍵詞］榫卯接縫；直剪性能；榫卯構(gòu)造；錨固長(zhǎng)度；連接性能

中圖分類號(hào)：TU937-1+6，TU317+.1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)09-0001-06

Experimental study on shear behavior of mortise-tenon joints with various details by direct-shear tests

CHU Mingjin1, LIU Jiliang2, WANG Bo1,3, AN Ning4, LI Aiqun1

(1 Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2 School of Civil Engineering, Dalian University of Technology, Dalian 116024, China; 3 Shandong Aikefu Building Technology  Co., Ltd., Yantai 264006, China; 4 School of Civil Engineering, Yantai University, Yantai 264005, China)

Abstract:The direct-shear tests of three specimens with different mortise-tenon joints were conducted to study the influence of mortise-tenon detail on mechanical properties of joints. The results show that mortise-tenon detail is reasonable and the integrity is good. When the length of the horizontal connecting rebar extending into the groove of mortise-tenon joint is 10 times the diameter of the steel rebar, the horizontal connecting rebar yields in tension without any slipping or anchoring failure before the specimen reaches the peak load. The mortise-tenon detail has significant influence on the mechanical properties of mortise-tenon joints. The crack load, crack displacement and peak displacement are increased with the increase of the section of vertical holes, while the stiffness of mortise-tenon joint is decreased. When the inner side of vertical hole and the bottom of transverse groove is in the same plane, there are less effects of increasing section of vertical hole on the bearing capacity.

Keywords:mortise-tenon joint; direct-shear behavior; mortise-tenon detail; anchorage length; connection performance

*國(guó)家自然科學(xué)基金項(xiàng)目(51778034)，山東省自然科學(xué)基金(ZR2018PEE024)，北京市屬高?；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助(X18179,X19003)。

作者簡(jiǎn)介：初明進(jìn)，博士，教授，博士生導(dǎo)師，Email: chumingjin@bucea.edu.cn；通信作者：李愛群，博士，教授，博士生導(dǎo)師，Email：liaiqun@bucea.edu.cn。