基于人工铰的自适应结构减震性能与恢复力研究  

Seismic mitigation and self-centering performance of the adaptive structure based on artificial hinge

作　　者：赵晗曦 尹新生[1] ZHAO Hanxi;YIN Xinsheng(School of Civil Engineering,Jilin Jianzhu University,Changchun 130000,Jilin,China)

机构地区：[1]吉林建筑大学土木工程学院,吉林长春130000

出　　处：《地震工程学报》2022年第2期328-335,共8页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51178205)。

摘　　要：钢筋混凝土框架结构节点处应力集中、侧向刚度小,在地震作用下容易导致结构整体失稳倒塌,而且梁端、柱端出现的塑性铰破坏严重,难以修复。提出一种全新的结构形式和一种新型人工铰:此种自适应结构能让建筑结构在地震作用下改变自身刚度、增大自振周期,减弱作用于结构的地震作用;新型人工铰具有良好的恢复力性能,能解决传统塑性铰破坏后难以修复的问题,通过设置人工铰将梁端铰从梁根处转移,能解决节点处应力集中的问题。通过ABAQUS软件改变人工铰的位置,建立3个自适应结构有限元模型与现浇框架模型进行对比研究。结果表明,基于自适应结构的控制系统方法让结构减少了70%的地震作用,人工铰和节点处抗震性能和恢复力性能良好。自适应结构可以广泛应用于各种装配式建筑,极大降低人工成本,彻底实现装配式建筑的智能化施工,对于装配式建筑的发展与推广具有重要的意义。此外,还提出了较方便的承载力计算方法和设置人工铰的设计建议。The reinforced concrete frame structure is easy to collapse under the action of earthquake due to the stress concentration and small lateral stiffness at the joints of structure,and the plastic hinges at the beam and column ends are seriously damaged and difficult to repair.A new structural form and a new type of artificial hinge were proposed in this paper.The self-adaptive structure can change the stiffness of the building structure and increase the natural period under earthquake,thus weakening the seismic action on the structure.The new artificial hinge with good resilience performance can solve the problem that the traditional plastic hinges are difficult to repair after failure.By setting the proposed artificial hinge,the beam end hinge was transferred from the beam root,thus the problem of stress concentration at the joints can be solved.The position of artificial hinge was changed by the ABAQUS software,and three finite element models for the adaptive structure were established and compared with the cast-in-situ frame model.The results showed that the adaptive structure-based control system reduces the seismic action of the structure by 70%,and the seismic performance and resilience performance of artificial hinges and joints are good.The adaptive structure can be widely used in various prefabricated buildings.It can greatly reduce labor costs and completely realize the intelligent construction of prefabricated buildings.In addition,a more convenient calculation method of bearing capacity and design suggestions for setting artificial hinges were put forward.

关 键 词：自适应结构 装配式 预应力 人工铰 变刚度减震 

分 类 号：TU375.4[建筑科学—结构工程]