实腹式型钢混凝土异形柱截面曲率分析及延性研究  

A Curvature Analysis and Ductility Research of Solid Steel Reinforced Concrete Special-Shaped Column

作　　者：王威[1] 甄国凯 权超超 宋鸿来 李昱 WANG Wei;ZHEN Guokai;QUAN Chaochao;SONG Honglai;LI Yu(School of Civil Engineering,Xi'an Universityof Architecture and Technology,Xi'an710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《建筑钢结构进展》2022年第9期56-66,共11页Progress in Steel Building Structures

基　　金：国家自然科学基金(51578449、51878548);陕西省自然科学基金重点项目(2022JZ-21)。

摘　　要：型钢混凝土柱是一种抗震性能优越的组合构件,经常被用于高层或超高层建筑中。近年来为了满足建筑物美观及室内装饰装修的要求,国内外学者针对型钢混凝土异形柱开展了相关研究,其中最常见的异形柱截面类型为十字形、L形和T形。以收集的型钢混凝土异形柱抗震性能试验为基础,对型钢混凝土异形柱的截面曲率进行分析,通过弯矩-曲率曲线研究曲率与构件变形性能的关系,确定异形柱屈服曲率和极限曲率的计算方法,利用截面屈服曲率和极限曲率得出位移延性系数。通过参数分析,研究构件的截面曲率变化情况,并通过参数拟合,提出适用于3种截面类型的型钢混凝土异形柱屈服曲率和极限曲率的简便计算公式,该公式可为实腹式型钢混凝土异形柱的变形计算以及抗震设计提供参考。Solid steel reinforced concrete column which has an excellent seismic performance has been extensively used in high-rise buildings.Over the years,solid steel reinforced concrete special-shaped columns have been noticed by domestic and foreign scholars for the aesthetic appearance of buildings and interior decoration.Cross-shaped columns,L-shaped columns and T-shaped columns are considered as the most common types of column section.In this paper,based on a seismic test of solid steel reinforced concrete special-shaped columns,the sectional curvatures of solid steel reinforced concrete specialshaped columns are analyzed,the correlation between cross sectional curvatures and deformation of component are established.The calculation method of yield curvature and ultimate curvature of special-shaped columns is determined,and the displacement ductility coefficient is obtained by cross sectional yield curvatures and ultimate curvatures.Finally,a simple equation applicable for the yield curvature and the ultimate curvature of solid steel reinforced concrete specialshaped columns of three types of sections is derived by fitting parameters.This formula can be used as a reference for deformation calculation and seismic design of solid steel reinforced concrete special-shaped columns.

关 键 词：实腹式型钢混凝土异形柱 弯矩-曲率关系 延性 抗震性能 计算公式 

分 类 号：TU398.1[建筑科学—结构工程] TU311.41