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重庆某超高层采用框架-核心筒结构,核心筒为钢筋混凝土筒体,框架梁为钢梁;在跨高比不大于1.25的混凝土连梁中部设水平缝形成双连梁,在走道上方的钢梁腹板开矩形洞穿设备管线。分析表明,连梁设水平缝后,可以实现连梁强剪弱弯的抗震目标,又可以保证核心筒的整体抗侧刚度,同时,应采用空间有限元程序建立双连梁模型,反映连梁设水平缝的实际受力情况;对本工程中开矩形洞口的钢梁,承载力可以满足设计要求,同时,整体计算时可以通过折减钢梁的刚度来考虑钢梁开洞对结构整体刚度的影响。
A super high-rise building in Chongqing adopts a frame-core tube structure with a core tube made of reinforced concrete and a frame beam made of steel beams. Horizontal cross-sections are formed in the middle of the concrete coupling beam with a height-to-height ratio of not more than 1.25 to form double coupling beams. Steel beams above the walkway The board opens a rectangular hole through the equipment line. The analysis shows that after horizontal beams are placed in horizontal beams, seismic targets for strong shearing and weak bending of coupled beams can be achieved, and the overall lateral stiffness of the core can also be ensured. At the same time, the space beam finite element program should be used to establish the double coupling beam model to reflect joint beams. Set the actual stress condition of horizontal seams; for the steel beam with rectangular openings in this project, the bearing capacity can meet the design requirements. At the same time, the overall calculation can be made by considering the stiffness of the steel beam to consider the influence of the opening of the steel beam on the overall stiffness of the structure.