issue
Civil Engineer
According to the provisions of Article 9.1.10 of the Technical Regulations for Concrete Structures of High-rise Buildings JGJ3-2010, "the main beam of the floor should not rest on the connecting beam of the core or inner cylinder", so the designer usually arranges the floor beam in an oblique way to avoid the main beam taking the connecting beam as the support (Fig. 4.2.5-1), but this practice is not conducive to room separation and equipment arrangement; For some projects, due to the functional requirements of the building, it is not allowed to set up diagonal beams, so that the floor beams have to be erected on the connecting beams, but no measures have been taken in the design.
settle
Civil Engineer
The plane arrangement of straight beams (Fig. 4.2.5-2) not only reduces material loss, but also facilitates construction, and at the same time is conducive to room separation and more beautiful. However, if this form of design is adopted, corresponding measures should be taken according to the actual situation:
1) It is advisable to improve the shear and torsional properties of the connecting beam, such as the shear and torsional elasticity of the connecting beam in the medium earthquake, and the shear and torsional resistance of the large earthquake without yielding.
2) Take measures such as strengthening the coupling ratio of the connecting beam or adding shear steel plates to improve the shear performance of the connecting beam.
3) The variable section beam can also be used to carry out the design of the connecting beam, as shown in Figure 4.2.5-3. In the design of small and medium earthquakes, the stiffness should not be reduced, and the bearing capacity is not significantly reduced under the action of large earthquakes, and the vertical load from the floor beams can still be beared. The energy-dissipating section is set according to the performance target of the energy-dissipating components, and the stiffness should be reduced when designing in small and medium, and the energy consumption should be succumbed under the action of a large earthquake.
