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钢筋混凝土双肢管柱,具有自重轻,用钢省和刚度大等优点。但是,由于节点构造复杂,拼装麻烦,影响了它的推广使用。针对上述问题,在改善双肢管柱节点方面作了一些试验研究工作,现予以介绍,以供设计、施工参考。不妥之处,望批评指正。 一、横腹杆插入节点 双肢管柱宜采用平腹杆型式。腹杆与肢杆的连接如采用插入节点,则在离心制管时,管肢需预留孔洞,如图1所示。管肢开洞后虽又填实,但开洞处载面是否削弱,洞口范围采用开口箍是否会影响管肢的承载力等问题应予澄清。因此,进行一批小偏压试验(图1)。偏心距取与洞口同侧偏5厘米,以模拟对单肢洞口受力的不利位置。
Reinforced concrete double-limb tubular columns have the advantages of light weight, steel saving and high rigidity. However, due to the complex structure of the nodes, the assembly is troublesome, which affects its popularization and use. In order to solve the above problems, some experimental research work has been done to improve the joints of the limbs and pipes, which are now introduced to provide reference for design and construction. Inappropriate, hope criticism and correction. One, horizontal abdominal rod insertion node The double limb limb should adopt the flat abdominal rod type. If the connection between the web rod and the limb rod adopts an insertion node, a hole needs to be reserved in the centrifuge tube, as shown in FIG. 1 . Although the tube is filled with holes after the hole is opened, whether the bearing surface at the hole is weakened or whether the opening area will affect the bearing capacity of the tube limb should be clarified. Therefore, a batch of small bias tests were performed (Figure 1). The eccentricity was taken on the same side of the hole as 5 cm to simulate the unfavorable position of the single-limb hole.