外部钢管约束型钢混凝土柱抗震耗能研究  

Seismicenergy dissipation analysis of square steel tube constrained steel concrete columns

作　　者：彭辉 吕辉 肖冲 Peng Hui;Lv Hui;Xiao Chong(College of Architecture and Engineering,Nanchang Institute of Technology,Nanchang 330044,China;College of Civil Engineering and Architecture,Nanchang Hangkong University,Nanchang 330063,China;Jiangxi Key Laboratory of Prefabricated Building and Intelligent Construction,Nanchang 330063,China)

机构地区：[1]南昌理工学院建筑工程学院,江西南昌330044 [2]南昌航空大学土木建筑学院,江西南昌330063 [3]江西省装配式建筑与智能建造重点实验室,江西南昌330063

出　　处：《工程抗震与加固改造》2025年第2期9-18,共10页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(52268031);南昌航空大学博士启动基金(EA201911291)。

摘　　要：型钢混凝土柱在高层与超高层建筑中应用广泛,但在高轴压比下型钢混凝土柱的承载力较低、延性较差,继而在高烈度地震区严重影响该结构的推广应用,为此,有必要采取外部钢管约束的构造措施以期提高柱的抗震性能。采用有限元软件建立实体钢管约束型钢混凝土柱模型,在与拟静力试验结果吻合较好的基础上,进一步建立多个足尺方钢管约束型钢混凝土柱算例模型,探讨有无钢管约束、钢管屈服强度、钢管壁厚、轴压比、混凝土强度等级、型钢强度等参数对柱的滞回性能、应力-应变、塑性耗能机制的影响。结果显示:外部钢管约束构造措施可显著提高柱的峰值承载力和延性,最大可提高167.5%;钢管的约束套箍作用可显著降低核心混凝土、纵筋、型钢的压应变及箍筋的拉应变,提高柱的总塑性耗能值而降低核心混凝土的耗能占比;混凝土强度等级的增大可提高柱的总塑性耗能值但会增大混凝土的耗能占比,对抗震不利,钢管、型钢屈服强度的增大可一定程度提高柱的塑性耗能值,但总体影响较小。研究所得结论可为实际工程中外钢管约束型钢混凝土柱的设计与加固构造措施提供参考与依据。Steel reinforced concrete columns are widely used in high-rise and super high-rise buildings,but under high axial compression ratios,the bearing capacity and ductility of steel reinforced concrete columns are relatively low,which seriously affects the promotion and application of this structure in high-intensity seismic areas.Therefore,it is necessary to adopt external steel pipe constraint to improve the seismic performance of the columns.Using finite element software to establish a solid steel tube constrained steel reinforced concrete column model,based on good agreement with quasi-static test results,multiple full-scale square steel tube constrained steel reinforced concrete column models were further established to explore the effects of parameters such as steel tube constraint,steel tube yield strength,steel tube wall thickness,axial compression ratio,concrete strength grade,and steel strength on the hysteresis performance,stress-strain,and plastic energy dissipation mechanism of the column.The results show that the external steel pipe constraint construction measures can significantly improve the peak bearing capacity and ductility of the column,with a maximum increase of 167.5%.The confinement and confinement effect of steel pipes can significantly reduce the compressive strain of core concrete,longitudinal reinforcement,and section steel,as well as the tensile strain of stirrups,thereby increasing the total plastic energy consumption value of the column and reducing the energy consumption proportion of core concrete.An increase in the strength grade of concrete can increase the total plastic energy consumption of the column,but it will increase the proportion of concrete energy consumption,which is unfavorable for earthquake resistance.An increase in the yield strength of steel pipes and profiles can to some extent increase the plastic energy consumption of the column,but the overall impact is relatively small.The conclusions obtained from the study can provide reference and basis for the design and rein

关 键 词：外钢管约束型钢混凝土柱 峰值承载力 延性 应力-应变 塑性耗能 

分 类 号：TU398.9[建筑科学—结构工程]