不同配钢率方形截面型钢混凝土巨型柱抗震试验  

Experimental study on seismic behavior of square steel reinforced concrete mega-column with different steel ratios

作　　者：曹万林[1] 赵洋 宋钰 周建龙[2] 吕西林[3] 殷飞[1] CAO Wanlin;ZHAO Yang;SONG Yu;ZHOU Jianlong;LV Xilin;YIN Fei(College of Civil Engineering and Architecture,Beijing University of Technology,Beijing 100124;East China Architectural Design&Research Institute,Shanghai 200002,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]华东建筑设计研究院有限公司,上海200002 [3]同济大学土木工程学院,上海200092

出　　处：《地震工程与工程振动》2019年第5期241-250,共10页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金面上项目(51878015)~~

摘　　要：方形截面型钢混凝土巨型柱是超高层建筑巨型框架组合结构的关键竖向构件,型钢混凝土组合巨型柱的截面配钢构造和配钢率是影响其抗震性能的主要因素。为确定方形截面型钢混凝土巨型柱在截面配钢型式、配筋及混凝土强度不变条件下的合理配钢率,结合某超高层建筑巨型框架的型钢混凝土巨型柱抗震设计,进行了两个不同配钢率的方形截面型钢混凝土巨型柱模型的低周反复荷载试验,比较了两个试件的水平承载力、滞回性能、骨架曲线、耗能、变形及刚度,分析了截面配钢率对方形截面型钢混凝土巨型柱抗震性能的影响。结果表明:两试件的破坏形态均以弯曲破坏为主,极限位移角均值为1/37,具有良好的变形能力;两试件滞回曲线均较饱满,耗能性能良好;随着截面配钢率的增大,试件的水平承载力和抗侧移刚度明显增大。进行了承载力计算,计算结果与试验符合较好。用ABAQUS进行了有限元计算,计算所得荷载-位移曲线与试验所得荷载-位移骨架曲线较为接近。本文研究为类似工程的抗震设计提供了参考。Square steel reinforced concrete(SRC)mega-column is the key vertical component of mega-frame composite structure of super high-rise building.The steel distribution type and steel ratio of SRC mega-column are the main factors affecting its seismic behavior.In order to study the ideal steel ratio under the same steel distribution type,reinforcement ratio and concrete strength,based on the SRC mega-columns in major projects,the low-cycle loading tests of two SRC mega-columns with different steel ratios were carried out.The bearing capacity,hysteretic behavior,skeleton curve,energy dissipation,deformation and stiffness of the specimens were compared.The effect of steel ratio on the seismic behavior of SRC mega-columns was studied.The results show that the failure modes of the specimens are bending failure;the average ultimate displacement ratio is 1/37,indicating good deformation capacity;the hysteretic curves of the specimens are full and the energy dissipation capacity is good;the bearing capacity and stiffness increase obviously with the increase of the steel ratio.The bearing capacity is calculated and the results are in good agreement with the test results.The load-displacement curves are obtained by using ABAQUS finite element method.The calculated curves are close to the test load-displacement skeleton curves.This study provides a basis for seismic design of similar projects.

关 键 词：型钢混凝土 配钢率 方形巨型柱 抗震性能 试验研究 

分 类 号：TU398.9[建筑科学—结构工程]