密缀板耗能格构柱加固既有框架结构的简化分析及工程应用  

Simplified analysis and engineering application of existing frame structure strengthened by energy dissipation lattice column with dense battens

作　　者：孟凡涛[1,2] 阮兴群 赵建锋 张玉明[2] 柳晓博 李显杰 MENG Fantao;RUAN Xingqun;ZHAO Jianfeng;ZHANG Yuming;LIU Xiaobo;LI Xianjie(College of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Shandong Huake Planning Architectural Design Co.Ltd.,Liaocheng 252000,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]山东华科规划建筑设计有限公司,山东聊城252000

出　　处：《中南大学学报（自然科学版）》2021年第3期1004-1016,共13页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51778314);山东省住房和城乡建设厅研究开发项目(2020-K3-9,2021-K2-2)。

摘　　要：为了解决既有建筑抗震加固施工过程中使用功能被中断的问题,基于摇摆结构的相关原理,提出一种密缀板耗能格构柱,其密集缀板采用低屈服点钢材的窄翼缘小截面钢梁,而2个柱肢是高屈服点钢材内部灌注高标号补偿收缩混凝土的钢管柱。首先,基于既有钢筋混凝土框架附加弯剪型子结构的方法,建立考虑附加子结构柱底弹性水平约束和弹性转动约束的微分方程,并利用参数取值的变化进行理论研究;然后,为了验证密缀板耗能格构柱对既有钢筋混凝土框架抗震的有利作用,将其应用于既有钢筋混凝土框架分别进行多遇地震和罕遇地震作用下的分析。研究结果表明:多遇地震作用下密缀板耗能格构柱可提供适当的刚度,使得既有钢筋混凝土框架结构的刚度有所提高;罕遇地震作用下,密缀板耗能格构柱能够改善既有钢筋混凝土框架的变形形态和受力状态,使其损伤分布更加均匀,残余变形显著降低。密缀板耗能格构柱在地震作用下屈服耗能,发挥了消能减震作用。In order to solve the problem that the function of existing buildings can be interrupted during the construction of seismic strengthening,a new type of energy dissipation lattice column with dense battens was proposed based on the related principle of rocking structure.The dense batten adopted narrow flange small section steel beam with low yield point,and the two column legs were steel tube columns with high yield point steel and high grade shrinkage compensating concrete.Firstly,based on the method of reinforced concrete frame with shearbending substructure,a new method was presented,which took into account the horizontal and rotational elastic constraints at the base of the column.The variation of the parameter value was studied theoretically.Then,in order to verify the beneficial effect of energy dissipation lattice columns with dense battens on the seismic resistance of existing reinforced concrete frames,the analysis of the frequently occurring earthquake and rarely occurring earthquake was carried out,respectively.The results show that the energy dissipation lattice columns with dense battens can provide appropriate stiffness during frequently occurring earthquake,which can improve the stiffness of existing reinforced concrete frame structures.The energy dissipation lattice columns with dense battens can improve deformation and stress state of the existing RC frame,make the damage distribution more uniform,and reduce the residual deformation significantly.The energy-dissipating lattice column with dense battens is subjected to seismic energy dissipation,which plays the role of energy dissipation and shock absorption.

关 键 词：摇摆结构 分布参数模型 密缀板耗能格构柱 抗震性能 抗震加固 

分 类 号：TU352.11[建筑科学—结构工程]