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新型钢绞线拉索几何抗弯刚度试验研究
Experimental Study on Geometric Bending Stiffness of New Steel Strand Cable
投稿时间:2019-02-20  修订日期:2019-04-15
DOI:103969/j.issn.1007 9629202004027
中文关键词:  高钒索  不锈钢索  几何抗弯刚度  频率法
英文关键词:galfan cable  stainless steel cable  geometric bending stiffness  frequency method
基金项目:国家自然科学基金资助项目(51878013);国家自然科学基金青年基金资助项目(51408016)
        
作者单位
孙国军
SUN Guojun
北京工业大学建筑工程学院,北京100022
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
袁军
YUAN Jun
北京工业大学建筑工程学院,北京100022
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
吴金志
WU Jinzhi
北京工业大学建筑工程学院,北京100022
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
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中文摘要:
      采用频率法对36根高钒索和不锈钢索进行了几何抗弯刚度试验,测得在3种预应力工况下3种直径高钒索和不锈钢索的各阶自振固有频率,然后提出基于BernoulliEuler理论的几何抗弯刚度迭代求解方法,识别计算出2种拉索的几何抗弯刚度.结果表明:随着拉索直径的增大,拉索几何抗弯刚度与全截面抗弯刚度的比值α逐渐降低,并拟合得到了α与拉索直径的函数关系.
英文摘要:
      The experiments on the geometric bending stiffness of 36galfan cables and stainless steel cables were carried out by frequency method. The natural vibration frequencies of three different diameters galfan cables and stainless steel cables under the three different prestress levels were measured. Then based on Bernoulli Euler theory, an iterative solution method of geometric bending stiffness was proposed. The geometric bending stiffness of three different diameters galfan cables and stainless steel cables were identified and calculated. The results show that the ratio of the geometric bending stiffness to the total section bending stiffness decrease as the diameter of the cable increases. The function relationship between the ratio and diameter is obtained.
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