| Openings will affect the internal force and deformation of the slab itself,which will reduce the punching resistance of the slab-column connection.However,the values of punching resistance of the plate-column conections with openings are obtained.There are few analytical studies.In order to establish an effective numerical simulation method for the open-slab column node,an improved 3D mesh beam model is established based on the Open SEES finite element calculation platform.The key parameters of the model are verified.The simulation results are in good agreement with the experimental results.The calculated value with Chinese code is closer to the experimental value than with the foreign codes such as the US code and the European code.The relevant formula can be used as a reference when the specification is revised.It is suggested that China's codes can more comprehensively consider the influence of different parameters,so that the design of slab-column structure in China can be more safe and reasonable,so that the slab-column structure can be further promoted in China.Combined with the existing experiments,the numerical simulations of the six edges members of the slab-column structure are carried out.It is found that the simulation results of the punching-cutting performance of the reinforced concrete slab-column connections and the test results are well fitted.The influence of those factors cannot be ignored in the actual engineering structure design.It is suggested that the influence of this factor should be considered in the revision of China's specifications.The reinforcement ratio and the strength of the steel bar have a great influence on the bending resistance of the slab-column structure.The greater the reinforcement ratio and the strength of the steel bar,the greater the ultimate flexural capacity.It is recommended to calculate the bearing capacity of the edge of the open-plate column.Take the board reinforcement ratio as an impact factor.Figure 72;Table 9;Reference 74... |
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