Grouted sleeves can effectively connect precast elements,but the effect of grouted sleeves for increased stiffness and assembled seam for weakening stiffness on the precast column’s mechanical properties is unclear.B...Grouted sleeves can effectively connect precast elements,but the effect of grouted sleeves for increased stiffness and assembled seam for weakening stiffness on the precast column’s mechanical properties is unclear.Based on the full-scale test results of precast columns connected with grouted sleeves and the correctness of the numerical models,the influence analysis of the individual and coupling action of the grouted sleeves and assembled seam on the deformation and bearing capacity of the precast column is carried out.The research results show that grouted sleeves significantly affect the deformation and peak bearing capacity of precast columns;when precast columns are subjected to the action of high axial pressure,grouted sleeves significantly affect the bearing capacity.However,the influence of assembled seams on the peaking capacity of the precast column is more obvious when it was tested under low axial compression.It is recommended that the connection position should be 2 times the height of the grouted sleeve from the bottom of the foundation.展开更多
Nowadays, the prefabrication level of bridge engineering is higher and higher, and many prefabricated components are used in construction, such as prefabricated bent cap. Compared with the previous cap beam constructi...Nowadays, the prefabrication level of bridge engineering is higher and higher, and many prefabricated components are used in construction, such as prefabricated bent cap. Compared with the previous cap beam construction technology, the fabricated cap beam can not only ensure the construction quality, but also speed up the construction speed, shorten the construction period, and lay a good foundation for bridge construction. Combined with the construction practice, this paper studies and discusses the important links of prefabricated bridge construction, the installation technology of precast column and the key points of construction quality control, hoping to provide reference for the compilation of relevant construction specifications in the future.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.51908013)Basic Scientific Research Foundation for Municipal University(X21076)。
文摘Grouted sleeves can effectively connect precast elements,but the effect of grouted sleeves for increased stiffness and assembled seam for weakening stiffness on the precast column’s mechanical properties is unclear.Based on the full-scale test results of precast columns connected with grouted sleeves and the correctness of the numerical models,the influence analysis of the individual and coupling action of the grouted sleeves and assembled seam on the deformation and bearing capacity of the precast column is carried out.The research results show that grouted sleeves significantly affect the deformation and peak bearing capacity of precast columns;when precast columns are subjected to the action of high axial pressure,grouted sleeves significantly affect the bearing capacity.However,the influence of assembled seams on the peaking capacity of the precast column is more obvious when it was tested under low axial compression.It is recommended that the connection position should be 2 times the height of the grouted sleeve from the bottom of the foundation.
文摘Nowadays, the prefabrication level of bridge engineering is higher and higher, and many prefabricated components are used in construction, such as prefabricated bent cap. Compared with the previous cap beam construction technology, the fabricated cap beam can not only ensure the construction quality, but also speed up the construction speed, shorten the construction period, and lay a good foundation for bridge construction. Combined with the construction practice, this paper studies and discusses the important links of prefabricated bridge construction, the installation technology of precast column and the key points of construction quality control, hoping to provide reference for the compilation of relevant construction specifications in the future.
