复杂型建筑双钢管混凝土短柱正截面抗折强度测试
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摘要
双钢管混凝土短柱抗折强度测试是建筑坚实程度检测中的重要组成部分。将构件长径比设置为3,构件高设置为900 mm,外钢管外径设置为300 mm,依据构件材料相关规程制度,将构件混凝土等级设置为C40,钢材的型号为Q235。依照参数设定,对3个参数相同的双钢管混凝土短柱构件正截面抗折强度进行测试。构件安装完毕,通过分级加载方式完成测试,且当荷载接近极限抗折强度时,采用慢速连续加载的形式施压,并连续记录与每一级荷载相应的应变片显示值。根据施压过程和得到的荷载与抗折位移间关系,计算构件抗折强度值。相关实验表明,在构件外层钢管轴向形变中,两个观测点获取的数值比较接近,且在弹性阶段,各个观测点所得数值几乎呈重合趋势;在钢管内层轴向形变中,能够显著观察出构件1钢管没有进入屈服阶段,原因应该是钢管内层尺寸相对较小;与当前方法比较,所提方法模拟值与实际值拟合度更高。综合各种实验结果,所提方法性能完善,可靠性高。
The flexural strength test of double-tube concrete short columns is an important part of the building solidity test. The length-to-diameter ratio of the component is set to 3,the height of the component is set to 900 mm,and the outer diameter of the outer steel pipe is set to 300 mm. According to the relevant regulations of the component material,the concrete grade of the component is set to C40,and the model of the steel is Q235. According to the parameter setting,the normal section flexural strength of three double-concrete concrete short-column members with the same parameters was tested.After the components are installed,the test is completed by the grading loading method,and when the load is close to the ultimate bending strength,the pressure is applied in the form of slow continuous loading,and the strain gauge display values corresponding to the loads of each stage are continuously recorded. According to the pressure application process and the relationship between the obtained load and the bending resistance,the flexural strength value of the member is calculated. Related experiments show that in the axial deformation of the outer steel tube of the member,the values obtained by the two observation points are relatively close,and in the elastic stage,the values obtained at each observation point almost coincide; in the axial deformation of the inner layer of the steel pipe,significant It isobserved that the steel pipe of the component 1 does not enter the yielding stage,and the reason is that the inner layer size of the steel pipe is relatively small; compared with the current method,the simulated value of the proposed method has a higher fitting degree with the actual value. Based on various experimental results,the proposed method has perfect performance and strong robustness.
The flexural strength test of double-tube concrete short columns is an important part of the building solidity test. The length-to-diameter ratio of the component is set to 3,the height of the component is set to 900 mm,and the outer diameter of the outer steel pipe is set to 300 mm. According to the relevant regulations of the component material,the concrete grade of the component is set to C40,and the model of the steel is Q235. According to the parameter setting,the normal section flexural strength of three double-concrete concrete short-column members with the same parameters was tested.After the components are installed,the test is completed by the grading loading method,and when the load is close to the ultimate bending strength,the pressure is applied in the form of slow continuous loading,and the strain gauge display values corresponding to the loads of each stage are continuously recorded. According to the pressure application process and the relationship between the obtained load and the bending resistance,the flexural strength value of the member is calculated. Related experiments show that in the axial deformation of the outer steel tube of the member,the values obtained by the two observation points are relatively close,and in the elastic stage,the values obtained at each observation point almost coincide; in the axial deformation of the inner layer of the steel pipe,significant It isobserved that the steel pipe of the component 1 does not enter the yielding stage,and the reason is that the inner layer size of the steel pipe is relatively small; compared with the current method,the simulated value of the proposed method has a higher fitting degree with the actual value. Based on various experimental results,the proposed method has perfect performance and strong robustness.
引文
[1]秦拥军,严文龙,于江.掺锂渣再生混凝土弹性模量及应力-应变曲线试验[J].科学技术与工程,2016,16(16):254-262.
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[4]赵扬,孙占花.剪跨比对大温差地区的混凝土剪力墙抗震性能指数影响实验[J].科技通报,2016,32(10):86-89.
[5]陶涛,张大长,孙波,等. Q460高强钢管自密实混凝土短柱轴压力学性能[J].土木工程与管理学报,2016,33(5):54-58.
[6]马辉,胡广宾,李哲,等.基于统一强度理论的圆钢管型钢再生混凝土短柱轴压承载力分析[J].应用力学学报,2017,34(6):1173-1180.
[7]王新忠,李传习,周维.钢筋玄武岩纤维混凝土短柱轴心受压承载能力试验研究[J].硅酸盐通报,2017,36(3):809-815.
[2]张俊强.基于智能视觉和BIM的建筑装配过程的高精度控制[J].计算机测量与控制,2017,25(10):66-68.
[3]王永涛,朱珺.基于AD7763的预应力混凝土管桩声纳扫描检测系统设计[J].电子设计工程,2017,25(20):174-178.
[4]赵扬,孙占花.剪跨比对大温差地区的混凝土剪力墙抗震性能指数影响实验[J].科技通报,2016,32(10):86-89.
[5]陶涛,张大长,孙波,等. Q460高强钢管自密实混凝土短柱轴压力学性能[J].土木工程与管理学报,2016,33(5):54-58.
[6]马辉,胡广宾,李哲,等.基于统一强度理论的圆钢管型钢再生混凝土短柱轴压承载力分析[J].应用力学学报,2017,34(6):1173-1180.
[7]王新忠,李传习,周维.钢筋玄武岩纤维混凝土短柱轴心受压承载能力试验研究[J].硅酸盐通报,2017,36(3):809-815.