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  

Multiple parameter analysis of bearing behavior of composite beamscast-in-place column subassemblages considering bond slip

作　　者：张望喜[1,2] 叶缘 周靓[3] 杨学峰 易伟建[1,2] ZHANG Wangxi;YE Yuan;ZHOU Liang;YANG Xuefeng;YI Weijian(College of Civil Engineering,Hunan University,Changsha 410082,P.R.China;Hunan Provincial Key Lab on Damage Diagnosis for Engineering Structures,Hunan University,Changsha 410082,P.R.China;Xiangxi Vocational and Technical College for Nationalities,Jishou,Hunan 416007,P.R.China)

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]湖南大学工程结构损伤诊断湖南省重点实验室,长沙410082 [3]湘西民族职业技术学院,湖南吉首416007

出　　处：《重庆大学学报》2025年第3期94-106,共13页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(52478167)。

摘　　要：利用ABAQUS接口User Element(UEL)子程序,建立了分离式自计算单元长度的界面黏结单元BS1,该单元能按指定的黏结滑移关系工作。基于简化的Eligehausen黏结滑移本构,对叠合梁-现浇柱子结构试验开展了数值模拟,结果与试验吻合良好。同时,验证了单元自计算长度的准确性,对比时间效率提高了25%。基于上述验证,建立30个叠合梁-现浇柱子结构模型,采用叠合梁现浇层厚度、T型翼缘板宽度、力作用方向等参数进行分析。结果表明,采用90°弯钩锚固和锚固板锚固的2种子结构,承载性能相差不大,延性相差约12%,宜优先选择90°弯钩锚固形式;承载力分析表明我国规范中对于叠合梁的T型翼缘板的宽度规定较国外规范更加可靠;地震作用下,力作用方向的改变,子结构前后承载力相差12%,变形能力相差55%,这种差异值得深入讨论。研究结果为考虑黏结滑移的装配式混凝土结构的数值分析提供了可靠参考。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 multiparameter analysis,considering variables such as the thickness of the cast-in-place layer,the slab width of Tcomposite 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.

关 键 词：界面单元 叠合梁-现浇柱子结构 黏结滑移 锚固形式 多参数分析 

分 类 号：TU313[建筑科学—结构工程]