干节点连接装配式混凝土梁静力性能试验研究-《建筑科学与工程学报》

文章信息/Info

Title:: Experimental Study on Static Properties of Fabricated Concrete Beams with Dry Nodes

Author(s):: CHENG Dong-hui, TIAN Ye-huan, ZHANG Liang-quan, XU Peng-cheng; School of Civil Engineering, Northeast Forestry University

Keywords:: fabricated concrete beam; dry node; static load test; bearing capacity; crack

摘要:: 为了解决装配式混凝土预制构件连接时节点湿作业带来的施工不便，设计制作了7根混凝土简支梁，其中包括1根现浇混凝土简支梁、1根按《装配式混凝土结构连接节点构造》中湿节点连接而成的预制混凝土简支梁以及5根由构造不同干节点连接而成的预制混凝土简支梁，对梁进行两点加载，完成了简支梁静载作用下力学性能试验，获得承载力、变形及裂缝分布等试验数据。结果表明：采用钢板焊接连接和钢板螺栓连接的干节点混凝土试验梁的承载力不弱于现浇混凝土梁，而采用钢板对焊连接、预应力连接和植筋连接的干节点试验梁承载力稍弱于现浇混凝土梁，且其挠度实测值与最大裂缝宽度实测值均比现浇混凝土梁略大。

Abstract:: In order to solve the construction inconvenience of node wet operations when connecting prefabricated concrete members, seven concrete simply supported beams were made, including one insitu concrete simply supported beam, one precast concrete simply supported beam connected by wet node according to Connecting Node Configuration of Prefabricated Concrete Structure and five precast concrete beams linked by different dry nodes. The mechanical properties of the beams under static load were tested by twopoint loading. The test data such as the bearing capacity, deformation and crack distribution were obtained. The results show that the carrying capacity of concrete test beams connected by dry nodes of steel welding and steel bolts are equivalent to insitu concrete beams. The carrying capacity of concrete test beams connected by steel anchors, prestressing and inserting reinforcing bars are slightly weaker than insitu concrete beams. The measured values of deflection and maximum crack width of concrete test beams with dry nodes are slightly larger than the insitu concrete beams.