- 摘 要
-
（1 哈爾濱工業(yè)大學(xué)土木工程學(xué)院， 哈爾濱 150090； 2 總參工程兵第四設(shè)計研究院， 北京 100039）
［摘要］為使預(yù)制混凝土夾芯墻體的內(nèi)葉與外葉之間通過連接件具有良好的整體工作性能，針對新型復(fù)合式連接件，對其抗拉、抗剪性能開展試驗研究，通過15個抗拉試驗和12個剪切試驗，獲得了該連接件的抗拉及抗剪能力、破壞過程與現(xiàn)象，分析了墻體中分布鋼筋與連接件位置關(guān)系及混凝土強度等級對連接件抗拉性能及剪切性能的影響。結(jié)果表明：復(fù)合式連接件的受拉破壞形式為混凝土的錐形體破壞，而剪切試驗呈現(xiàn)連接件穿心鋼筋的彎剪破壞；復(fù)合式連接件的抗拉承載力及抗剪承載力與實際工程中連接件所受的拉力及剪力實測值相比，具有較大的安全儲備，可在實際工程中應(yīng)用推廣；墻體內(nèi)分布鋼筋與連接件的位置關(guān)系對極限承載力大小及破壞現(xiàn)象基本沒有影響，但外葉墻中的鋼筋網(wǎng)片以及十字形鋼筋能夠延緩連接件的拔出過程；混凝土強度對連接件的抗拉承載力有顯著影響，而對抗剪承載力無影響；最后，基于試驗現(xiàn)象及分析，提出了新型復(fù)合式連接件抗拉承載力計算方法。
［關(guān)鍵詞］預(yù)制混凝土； 夾芯墻； 復(fù)合式連接件； 受力性能
中圖分類號：TU375文獻標(biāo)識碼：A文章編號：1002-848X(2018)07-0073-06
Experimental study on mechanical performance of composite connector for prefabricated concrete sandwich panels
Zhai Ximei1, Wang Xueming1,2
(1 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2 4th Engineer Design & Research Institute of General Staff, Beijing 100039, China)
Abstract:In order to study the cooperative work between inner panel and outer panel for prefabricated concrete sandwich panels, the mechanical performance including tensile performance and shear performance of a new composite connector was investigated through the experiment of 15 tensile specimens and 12 shear specimens. The connector′s tensile capacity and shear capacity, the tensile and shear failure process of all specimens were obtained. Moreover, the experiments gained the effect rule on mechanical performance of the composite connector from concrete strength and positional relation of the connector and distribution reinforcement. The results from tests and analysis show that the composite connector provides an enough safety reserve for its application in practical engineering. The tensile failure model is cone body damage of concrete and the shear failure model is bending shear failure of the connector′s reinforcing steel bar, both of which are brittle. The relative position of the connector and distribution reinforcement has no influence on the unltimate bear capacity but can delay the connector pulling out from the outer panel. The tensile strength is signifigently effected by concrete strength which has no impact on the shear strength. Finally, the approach of calculating tensile bearing capacity for composite connector is proposed based on experimental phenomena and analysis.
Keywords:prefabricated concrete; sandwich wall panel; composite connector; mechanical performance
*國家重點研發(fā)計劃（2016YFC0701502）。
作者簡介：翟希梅，博士，教授，博士生導(dǎo)師，Email: xmzhai@hit.edu.cn。
