超高强型钢混凝土组合柱受力性能及设计方法  

Structural performance and design method of ultra-high strength steel reinforced concrete composite columns

作　　者：赖柄霖 温安平 舒赣平[1,2] 王斌[3] LAI Binglin;WEN Anping;SHU Ganping;WANG Bin(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China;School of Civil Engineering,Southeast University,Nanjing 211189,China;Failure Mechanics&Engineering Disaster Prevention and Mitigation,Key Laboratory of Sichuan Province,Sichuan University,Chengdu 610065,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京211189 [2]东南大学土木工程学院,江苏南京211189 [3]四川大学灾变力学与工程防灾四川省重点实验室,四川成都610065

出　　处：《建筑结构学报》2023年第8期139-148,共10页Journal of Building Structures

基　　金：中央高校基本科研业务费专项资金资助(2242022R10015);灾变力学与工程防灾四川省重点实验室开放课题(FMEDP202112)。

摘　　要：为研究JGJ 138—2016《组合结构设计规范》对于超高强型钢混凝土(SRC)组合柱的适用性,根据试验研究、数值模拟和理论分析,对材料强度涵盖C130、C90高强混凝土和S690、S500、S355型钢的SRC柱受力性能和工作机理进行了研究。试验变量包括荷载偏心率、构件含钢率、钢纤维掺量及箍筋构造形式等,对构件破坏模式、承载能力和变形能力等指标进行分析,并基于纤维单元法预测了压弯构件荷载-挠度响应和轴力-弯矩相关曲线。通过对比分析,指出现行欧洲规范EC4中塑性应力分布方法高估了SRC柱承载力,并基于钢与混凝土强度匹配准则和柱构件变形性能,提出了高强材料有效强度用于SRC柱承载力预测,预测效果较设计规范有明显改善。In order to study the applicability of the current composite structure design code for steel reinforced concrete(SRC)columns with high-strength materials,the experimental,numerical,and analytical studies on the static performance and working principle of high-strength SRC columns with C130 and C90 concrete and S690,S500,S355 steel section were presented.The test variables included load eccentricity,steel content ratio,steel fiber content and stirrup configuration.The damage pattern,load-carrying capacity and deformation capability of specimens were analyzed,and the numerical simulation was performed by using the fiber element method to predict the load-deformation behavior and axial force-bending moment interaction curves.According to the comparative study,the plastic stress distribution assumption stipulated in current Eurocode 4 is found to overestimate the capacity of high strength SRC columns,and the concept of effective material strength is then proposed based on material compatibility between steel and concrete materials to assist the prediction of capacity of high strength SRC columns.The prediction accuracy is obviously improved compared with the current design specification.

关 键 词：型钢混凝土柱 高强混凝土 高强型钢 纤维单元法 设计方法 

分 类 号：TU398.9[建筑科学—结构工程] TU311.4