| Recent years,with the rapid development of China’s building industrialization,the prefabricated concrete structure has a high degree of industrialization,the construction speed,high product quality,has the advantages of environmental protection,high social benefits of the rapid promotion and use in China.However,the joint has great influence on the integrity and mechanical properties of the precast structure,it would be of great significance to the popularization and development of prefabricated assembly structures by studying the shear capality of the horizontal joints of the precast shear wall.Based on the experimental results of seismic and shear behavior of precast shear wall structures at home and abroad,five typical shear wall behavior calculation models are summarized.On the basis of the results of the trial the grout sleeve splicing and indirect splicing with welding,a comprehensive analysis of the performance of the two kinds of reinforcement connections is made and some suggestions for improvement are put forward.The paper makes analysis of the influencing factors of the shear capacity of horizontal joint and calculation of the trial on precast shear wall which was conducted by Tsinghua University and Southeast University.The results show that the grout sleeve splicing and indirect splicing with welding are safe and reliable and can ensure the effective connection of steel.When the anchorage length of the grout sleeve splicing is 0.9al,the connection is still safe.The anchorage length of indirect splicing with welding is 0.3al.The shear bearing capacity of horizontal joint is only related to interface structure,material property and stress form,but not to the position of horizontal joint.The shear strength of the horizontal joints is larger than that of wall seismic response at home and abroad,which indicates that the shear resistance of the shear wall is good and the seismic performance of the wall can be guaranteed. |
PDF Full Text Request