摘要
为实现装配式结构震损后能快速修复以恢复使用功能,提出一种带可恢复功能节点的装配式框架结构体系。利用ABAQUS有限元软件对可恢复功能节点进行数值模拟,探讨可恢复功能节点的作用机理,并将可恢复功能节点布置到装配式框架结构中形成可恢复功能装配式框架结构,考察整体结构的受力机理,可更换耗能铰、装配式节点核心区与梁柱部件的失效演化规律。结果表明,节点的失效主要是由于可恢复功能节点在削弱钢板处的损伤累积引起的断裂导致;与现浇混凝土框架及节点加强型现浇混凝土框架相比,可恢复功能装配式框架的承载能力更高、延性更好,通过可更换耗能铰的塑性变形耗散能量大幅度提高了结构的耗能能力,且结构的损伤破坏集中在削弱钢板上,有效地避免了预制梁柱和节点核心区的损伤。震后通过更换损伤耗能元件即可恢复结构的使用功能,实现了损伤可控和震后功能可恢复的抗震设防理念。
To realize the quick repair and earthquake resilience of the prefabricated structure after earthquake,the prefabricated frame structural system with replaceable earthquake-resilient joints was proposed.Numerical simulation was carried out by using ABAQUS to explore the mechanism of the earthquake-resilience joints.The replaceable earthquake-resilient joints were arranged in the assembly frame structure to form an earthquake-resilient frame structure.The mechanical mechanism of the whole structure was investigated,as well as the failure evolution law of the energy-dissipation hinges,the core area of the assembly joint and the framing components.Research results show that the failure of the joints was largely due to the fracture caused by the damage accumulation at the weakened steel plate.Compared with the cast-in-place concrete frame structure and cast-in-place concrete structure with strengthened joints,the earthquake-resilient prefabricated frame structure developed higher bearing capacity and better ductility,and the energy-dissipation capacity of the structure was enhanced greatly by the plastic deformation of the replaceable energy dissipation hinges.The structural damage was concentrated on the weakened steel plates,which effectively helped avoid the damage on the prefabricated beam-columns and core joints,and the seismic performance could be restored by replacing the damaged members.The prefabricated frame structural system with replaceable earthquake-resilient joints achieve the objective of damage controllability and earthquake resilience.
作者
刘如月
薛潘荣
颜桂云
LIU Ruyue;XUE Panrong;YAN Guiyun(Fujian Provincial Key laboratory of Advanced Technology and Information in Civil Engineering, Fuzhou 350118, China;School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China)
出处
《福建工程学院学报》
CAS
2020年第6期553-559,共7页
Journal of Fujian University of Technology
基金
国家自然科学基金面上项目(51878174)
福建省自然科学基金项目(2019J01778)
福建工程学院科研启动基金(GY-Z0601)。
关键词
功能可恢复节点
装配式框架
可更换耗能铰
损伤可控
抗震性能
earthquake-resilient joint
prefabricated frame structure
replaceable energy-dissipation hinge
damage-controllability
seismic behavior
