考虑黏结滑移影响的叠合梁-现浇柱子结构承载性能多参数分析OA北大核心

A discrete interfacial bonding element(BS1)was developed using the User Element(UEL)interface in ABAQUS,ant it's capable of automatically calculating element length based on a specified bond-slip relationship.Numerical simulations of beam-cast-in-place column subassemblages were carried out using the simplified Eligehausen bond-slip constitutive model.The results were consistent with experimental data.The BS1 element demonstrated a 25%improvement in computational efficiency due to its automatic length calculating feature.A total of 30 finite element models of PC beam-column subassemblages were established for multi-parameter analysis,considering variables such as the thickness of the cast-in-place layer,the slab width of T-composite beams,and the direction of load application.Results show that subassemblages with 90° hooked bars and headed bars exhibit nearly equivalent bearing capacities,though the ductility index differs by 12%,favoring the 90° hooked bar.The slab width specified in Chinese design codes proved more reliable for bearing capacity performance than those in foreign codes.Furthermore,changes in load directions result in a 12%variation of bearing capacity and a 55%difference in deformation capacity,highlighting the need for further investigation.This study provides valuable insights and reliable references for the numerical analysis of prefabricated concrete structures considering bond-slip effects.