偏压作用下T形钢管混凝土芯柱的非线性分析  

Nonlinear Analysis of T-Shaped Concrete-Filled Steel Tube Core Columns under Eccentric Compression

作　　者：徐亚丰[1] 陈科[1] 于力友 O.E.Sysoev Dzyuba Victo 刘国桢 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳市晶鑫工程项目管理有限公司,辽宁沈阳110020 [3]俄罗斯阿莫尔国立工程大学建筑系,俄罗斯阿莫尔681013 [4]湖北宏信工程造价有限公司,湖北武汉448000

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第5期852-858,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(90815020);辽宁省教育厅科研计划资助项目(LS2010131);沈阳市人才资源开发专项资金资助项目(2007140303002);沈阳建筑大学省级重点实验室开放基金项目(JG-200904)

摘　　要：目的提出计算T形钢管混凝土芯柱的正截面承载力的有效方法,为钢管混凝土在工程中的设计和应用提供参考依据.方法基于平截面假定和材料模型,利用数值积分法编制了适用于计算T形钢管混凝土芯柱正截面承载力的非线性分析程序,得出极限承载力的电算结果以及不同钢管厚度和不同混凝土强度等级的N-M相关曲线.结果在偏压作用下,混凝土强度等级变化以及含钢率对T形钢管混凝土芯柱极限承载力影响明显.极限承载力随混凝土强度等级提高而提高,但是随着偏心距增大混凝土强度等级对极限承载力提高幅值越小;钢管壁越厚,含钢率大,提供核心混凝土的约束力越强,相同M值能承受的力越大,抗震性能与延性越好.结论实际工程应用时,通过试件的数值计算分析得出的M-N曲线可以快速计算出钢管厚度,为T形钢管混凝土芯柱的方案设计提供便利.The purpose of the paper is to present effective way to figure out the bearing capacity of normal section of concrete-filled steel tube T shaped core columns, and provide a reference for the design and application of concrete filled steel tube in the project. Based on plane section assumption and material model, using numerical integration to compose nonlinear program that is suitable for calculating formal section bearing capacity of concrete-filLed steel tube T-shaped core columns and obtain both computer calculated results of ultimate bearing capacity and N-M interrelated curves of different steel tube thickness and different concrete strength grade. Under unsymmetrical pressure, steel ratio and the change of concrete strength grade have a conspicuous influence on ultimate bearing capacity of concrete-filled steel tube T-shaped core columns. The ultimate bearing capacity with the concrete strength increased and improved, but as the amplitude of the smaller eccentricity increases the strength grade of concrete to improve the ultimate bearing capacity. The thicker the steel pipe wall, steel ratio, the stronger the binding core concrete, the greater the force the same value of M can withstand seismic performance and ductility, the better. M-N curve analysis obtained by the numerical calculation of the specimen can quickly calculate the thickness of steel tube in the actual project, to facilitate the design of the T-shaped steel concrete core columns.

关 键 词：数值积分法 T形钢管混凝土芯柱 正截面承载力 非线性分析 偏压作用 

分 类 号：TU398.9[建筑科学—结构工程]