西安建筑科技大学学报(自然科学版)

圆形高强中空夹层钢管混凝土构件轴压性能试验研究

(1.国网浙江省电力有限公司丽水供电公司,浙江丽水 323000; 2.西安建筑科技大学土木工程学院,陕西西安 710055; 3.丽水正阳电力建设有限公司,浙江丽水 323000)

Study on the axial compression behavior of circular high strength concrete-filled double skin steel tubular members

WANG Cancan¹,LIANG Xudong²,ZHU Peihong¹,WANG Xiantie²,PANG Yahong²,MENG Fandong³,WU Jianling³

(1.State Grid Zhejiang Electric Power Co.,Ltd,Lishui Power Sapply Company,Lishui 323000,China; 2.School of Civil Engineering,Xi'an Univ. of Arch. & Tech.,Xi'an 710055,China; 3.Lishui Zhengyang Electric Power Construction Co.,Ltd.,Lishui 323000,China)

Keywords： high strength; circular concrete-filled double skin steel tubes; axial compression behavior; experimental research; finite element analysis

DOI: 10.15986/j.1006-7930.2021.03.008

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参考文献

为研究由Q690钢材和C100(C120)混凝土组成的圆形高强中空夹层钢管混凝土构件的轴压性能,以混凝土强度、截面空心率和截面含钢率为主要变化参数进行了6个圆形高强中空夹层钢管混凝土轴压试件的试验研究.结果表明:随着混凝土强度提高试件承载力增加,随着截面空心率和含钢率的增大试件承载力降低; 轴压荷载作用下,试件可能发生“鼓曲型”和“剪切型”破坏.“鼓曲型”破坏的试件有较高的后期承载力,延性较好; “剪切型”破坏试件的延性相对较低.采用有限元软件ABAQUS分析了空心率、混凝土强度及内、外钢管径厚比对圆形高强中空夹层钢管混凝土构件轴压性能的影响规律.提出了圆形高强中空夹层钢管混凝土构件的轴压承载力和刚度计算公式,公式计算结果与试验结果吻合较好.

In order to study the axial compression properties of circular high-strength concrete-filled double skin steel tubular members composed of Q690 steel and C100(C120)concrete,six circular high-strength concrete-filled double skin steel tubular members were tested with concrete strength,section void ratio and section steel ratio as the main parameters. The results show that: with the increase of concrete strength,the bearing capacity of the specimens increases,and with the increase of void ratio and steel content,the bearing capacity of the specimens decreases; under the action of axial compression,the specimens may suffer from “tympanic” and “shear” failure. “Tympanic” failure specimens have higher bearing capacity and better ductility at the later stage,“shear” failure specimens have relatively low ductility. By using the finite element software ABAQUS,the influence of void ratio,concrete strength and the ratio of inner and outer steel diameter to thickness on the axial compression performance of circular high-strength concrete-filled double skin steel tubular members is analyzed. The formulas for calculating the bearing capacity and stiffness of circular high-strength concrete-filled double skin steel tubular members are put forward. The results of the formulas are in good agreement with the test results.

引言
1 试验概况
2 试验结果与分析
3 非线性有限元分析
4 参数分析
5 承载力与刚度计算
6 结论

表1 试件主要参数<br/>Tab.1 Main parameters of specimens

表1 试件主要参数
Tab.1 Main parameters of specimens

表2 钢材材性参数<br/>Tab.2 Steel property parameters

表2 钢材材性参数
Tab.2 Steel property parameters

表3 混凝土材性参数<br/>Tab.3 Concrete material property parameters

表3 混凝土材性参数
Tab.3 Concrete material property parameters

图1 试验加载装置
Fig.1 Test loading device

图2 测点布置<br/>Fig.2 Layout of measuring points

图2 测点布置
Fig.2 Layout of measuring points

图3 试件CFDST-ZY-1破坏形态<br/>Fig.3 Failure patterns of CFDST-ZY-1 specimen

图3 试件CFDST-ZY-1破坏形态
Fig.3 Failure patterns of CFDST-ZY-1 specimen

图4 试件CFDST-ZY-5破坏形态<br/>Fig.4 Failure patterns of CFDST-ZY-5 specimen

图4 试件CFDST-ZY-5破坏形态
Fig.4 Failure patterns of CFDST-ZY-5 specimen

图5 试验试件破坏形态<br/>Fig.5 Failure patterns of test specimens

图5 试验试件破坏形态
Fig.5 Failure patterns of test specimens

图6 荷载-位移曲线<br/>Fig.6 Load-displacement curves

图6 荷载-位移曲线
Fig.6 Load-displacement curves

图7 试件CFDST-ZY-1荷载-应变曲线<br/>Fig.7 Load-strain curves of CFDST-ZY-1 specimen

图7 试件CFDST-ZY-1荷载-应变曲线
Fig.7 Load-strain curves of CFDST-ZY-1 specimen

图8 试件CFDST-ZY-5荷载-应变曲线<br/>Fig.8 Load-strain curves of CFDST-ZY-5 specimen

图8 试件CFDST-ZY-5荷载-应变曲线
Fig.8 Load-strain curves of CFDST-ZY-5 specimen

图9 模型网格划分
Fig.9 Model meshing

图10 有限元与试验荷载-位移曲线对比<br/>Fig.10 Comparison of load-displacement curves between FEM and test

图10 有限元与试验荷载-位移曲线对比
Fig.10 Comparison of load-displacement curves between FEM and test

图11 有限元与试验破坏形态对比<br/>Fig.11 Comparison of failure modes between FEM and test

图11 有限元与试验破坏形态对比
Fig.11 Comparison of failure modes between FEM and test

图12 试件CFDST-ZY-1荷载-位移曲线<br/>Fig.12 Load displacement curve of CFDST-ZY-1 specimen

图12 试件CFDST-ZY-1荷载-位移曲线
Fig.12 Load displacement curve of CFDST-ZY-1 specimen

图13 钢管与混凝土之间的相互作用<br/>Fig.13 Interaction between steel tube and concrete

图13 钢管与混凝土之间的相互作用
Fig.13 Interaction between steel tube and concrete

图14 不同空心率构件的荷载-位移曲线<br/>Fig.14 Load-displacement curves of components with different void ratio

图14 不同空心率构件的荷载-位移曲线
Fig.14 Load-displacement curves of components with different void ratio

图15 不同混凝土强度构件的荷载-位移曲线<br/>Fig.15 Load-displacement curves of different concrete strength members

图15 不同混凝土强度构件的荷载-位移曲线
Fig.15 Load-displacement curves of different concrete strength members

图16 不同内管径厚比构件的荷载-位移曲线<br/>Fig.16 Load-displacement curves of members with different inner diameter-thickness ratios

图16 不同内管径厚比构件的荷载-位移曲线
Fig.16 Load-displacement curves of members with different inner diameter-thickness ratios

图17 不同外管径厚比构件的荷载-位移曲线<br/>Fig.17 Load-displacement curves of members with different outer diameter-thickness ratios

图17 不同外管径厚比构件的荷载-位移曲线
Fig.17 Load-displacement curves of members with different outer diameter-thickness ratios

图18 不同内管强度构件的荷载-位移曲线<br/>Fig.18 Load-displacement curves of members with different inner steel strength

图18 不同内管强度构件的荷载-位移曲线
Fig.18 Load-displacement curves of members with different inner steel strength

图19 不同长径比构件的荷载-位移曲线<br/>Fig.19 Load-displacement curves of members with different draw ratios

图19 不同长径比构件的荷载-位移曲线
Fig.19 Load-displacement curves of members with different draw ratios

图20 不同长径比构件的破坏形态<br/>Fig.20 Failure modes of members with different draw ratios

图20 不同长径比构件的破坏形态
Fig.20 Failure modes of members with different draw ratios

表4 试件承载力对比<br/>Tab.4 Comparison of bearing capacity of specimens

表4 试件承载力对比
Tab.4 Comparison of bearing capacity of specimens

表5 约束效应修正系数<br/>Tab.5 Amplification coefficient of constraint effect

表5 约束效应修正系数
Tab.5 Amplification coefficient of constraint effect

表6 建议公式计算结果与试验结果对比<br/>Tab.6 Comparison between the calculation results of the suggested formula and the test results

表6 建议公式计算结果与试验结果对比
Tab.6 Comparison between the calculation results of the suggested formula and the test results

表7 建议公式计算结果与有限元结果对比<br/>Tab.7 Comparison between the calculation results of the suggested formula and the FEM results

表7 建议公式计算结果与有限元结果对比
Tab.7 Comparison between the calculation results of the suggested formula and the FEM results

表8 试件刚度计算结果与试验结果比较<br/>Tab.8 Comparison between the calculated results of the rigidity of the test pieces and the test results

表8 试件刚度计算结果与试验结果比较
Tab.8 Comparison between the calculated results of the rigidity of the test pieces and the test results

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期刊信息

西安建筑科技大学学报(自然科学版)
（1957年创刊双月刊）

主管单位：陕西省教育厅

主办单位：西安建筑科技大学

主　　编：刘加平（院士）

副主编：史庆轩（常务）张引科张小龙

国内刊号：CN61-1295/TU

I S S N：1006-7930

地　　址：西安市雁塔路中段13号

国内发行：西安建筑科技大学学报编辑部

国外发行：中国出版对外贸易总公司

编辑出版：西安建筑科技大学学报编辑部

备注

引言

1 试验概况

2 试验结果与分析

3 非线性有限元分析

4 参数分析

5 承载力与刚度计算

6 结论

期刊信息