Research on Seismic Bearing Capacity Reliability of Prefabricated Reinforced Concrete Columns with Sleeve Grouting Defects
In order to study the seismic bearing capacity reliability of prefabricated reinforced concrete columns with sleeve grouting defects,the bearing capacity curves of prefabricated reinforced concrete columns under different grouting defect degrees were obtained by referring to the calculation method of normal section bearing capacity of eccentric compression members specified in the code.Considering the combination of gravity load and earthquake action,the seismic bearing capacity reliability of prefabricated reinforced concrete columns under different grouting defect degrees and design parameter values is calculated,and the variation law is analyzed.The research results show that the grouting defects can reduce the bearing capacity of prefabricated reinforced concrete columns to different degrees.The grouting defects in the tension area mainly affect the bearing capacity under tension failure,and the grouting defects in the compression area mainly affect the bearing capacity under compression failure.When other parameters are the same,the reliability of the seismic bearing capacity of prefabricated reinforced concrete columns under grouting defects will decrease to different degrees compared with full grouting,and the reliability index of seismic bearing capacity corresponding to the axial compression ratio of 0.4 is greater than that when the axial compression ratio is 0.6.
万方数据
维普
