服役期结构参数对装配节点抗震性能影响分析  

Analysis of the Influence of Structural Parameter on the Seismic Performance of Precast Concrete Joints during Service Life

作　　者：赵俊 丁建国[1] ZHAO Jun;DING Jian-guo(School of Science,Nanjing University of Science and Technology,Nanjing Jiangsu 210094China)

机构地区：[1]南京理工大学理学院,江苏南京210094

出　　处：《江苏建筑》2023年第2期31-36,共6页Jiangsu Construction

摘　　要：为了研究影响常用装配整体式框架节点抗震性能的重要结构参数,文章分别选取柱混凝土强度、柱纵筋直径、柱纵筋强度等级、梁下部纵筋直径为主要研究因素,采用正交数值试验方法进行仿真分析,并将所得结果进行极差分析,分析研究各结构参数对节点抗震性能主要表征参数的影响程度。结果表明:当服役期达到50年时,柱混凝土强度以及柱纵筋直径对节点的峰值荷载和屈服荷载影响较大,柱混凝土强度、柱纵筋强度、梁底部纵筋直径对节点的延性系数影响较大。在一定范围内,随着柱混凝土强度以及柱纵筋直径的增大,节点的峰值荷载以及屈服荷载呈现增长趋势;延性系数随着柱混凝土强度的增大不断减小;随着柱纵筋强度、梁底部纵筋直径的增加呈正相关。In order to study the important structural parameters that affect the seismic performance oftypical joints for monolithic precast concrete frame structures,the strength of column concrete,the diameter of column longitudinal bars,the strength grade of column longitudinal bars,and the diameter of longitudinal bars at the lower part of the beam are selected as the main research factors,and the orthogonal numerical test method is used for simulation analysis,the results obtained are analyzed by the range analysis,and the influence of each structural parameter on the main characterization parameters of the seismic performance of the joints is analyzed and studied.The results show that:When the service life reaches 50 years,the strength of column concrete and the diameter of column longitudinal bars have a greater impact on the peak load and yield load of the joint,and the strength of column concrete,the strength of column longitudinal bars,and the diameter of longitudinal bars at the bottom of the beam have a greater impact on the ductility coefficient of the joint.In a certain range,with the increase of column concrete strength and column longitudinal bar diameter,the peak load and yield load of the joints show an increasing trend;The ductility coefficient decreases with the increase of column concrete strength;With the increase of column longitudinal reinforcement strength and beam bottom longitudinal reinforcement diameter,there is a positive correlation.

关 键 词：常用装配整体式框架节点 服役期 正交试验 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]