上翼缘贯通的后加悬挑结构

Adding cantilever members with upper flange continued in the as-built buildings

后加悬挑结构作为丰富建筑效果的方式经常被用在既有建筑改造中,由于悬挑结构的冗余度低,可靠性主要取决于连接节点的设计和施工。在加固改造的后连接方式中,受压和受剪主要取决于结构的材料强度,而受拉主要取决与锚固长度、连接工艺和胶接材料。上翼缘贯通的后加悬挑构件,通过将钢梁上翼缘从既有结构边梁顶部贯通,保证上翼缘的拉力可以直接传递至内侧,腹板和下翼缘在既有梁边断开通过埋件连接,埋件主要传递腹板的剪力和下翼缘的压力。上翼缘贯通的后加悬挑钢梁,施工更加方便、连接可靠,对原结构的梁柱损伤较小,受力形式更接近新建结构,可以实现更大距离的悬挑。

Adding cantilevered members are often used to enrich architectural effect in the as-built buildings.Due to the low redundancy of cantilevered members,the reliability mainly depends on the design and construction of connecting nodes.The connection node of reinforcement,compression and shear mainly depend on the material strength of the structure,while tension mainly depends on the anchorage length,connection technology and bonding materials.Adding cantilevered members with the upper flange through are more convenient for construction and reliable connection.It has less damage to the beam and column of the original structure,and the form is closer to the new structure,which can realize cantilevered for a greater distance.