| 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. |
| 关键词: 高钒索 不锈钢索 几何抗弯刚度 频率法 |
| DOI：103969/j.issn.1007 9629202004027 |
| 分类号: |
| 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） |
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| Experimental Study on Geometric Bending Stiffness of New Steel Strand Cable |
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SUN Guojun, YUAN Jun, WU Jinzhi
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College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
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| Abstract: |
| 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. |
| Key words: galfan cable stainless steel cable geometric bending stiffness frequency method |
