悬索及悬索-框架结构的几何非线性分析

舒赣平; 范圣刚; 王建峰; 刘辉; 陈绍礼

doi:10.13204/j.gyjz200205002

悬索及悬索-框架结构的几何非线性分析

doi: 10.13204/j.gyjz200205002

基金项目:

国家重点基础研究发展计划资助项目(2004CB619106)

计量
- 文章访问数: 29
- HTML全文浏览量: 1
- PDF下载量: 24
- 被引次数: 0
出版历程
- 收稿日期: 2009-12-24
- 修回日期: 2009-12-24
- 刊出日期: 2002-05-20

Funds:

Supported by National Basic Research Program of China (No.2004CB619106)

摘要

摘要: 运用修正Lagrange坐标描述，引进五节点曲线索单元和四次多项式为位移插值函数，基于非线性应变定义，推导了悬索单元的切线刚度矩阵，采用刚度凝聚方法，大大减少了计算机的存储和计算量，并使得曲线索单元能与PEP单元相结合，实现对大跨度和复杂的悬索及悬索 -框架结构全过程的几何非线性分析与设计。算例计算结果表明，该方法精度很高，便于应用

Abstract: Objective To summarize the clinical features and analyze the serologic test results of latent syphilis. Methods The clinical data of 601 patients with latent syphilis who were treated in the sexually transmitted disease centre of Peking Union Medical College Hospital between January 2001 and November 2007 were retrospectively analyzed. Results Of the 601 cases of latent syphilis,there were 174 cases of early latent syphilis(EL),170 cases of late latent syphilis(LL),and 257 cases of unknown latent syphilis. Male to female ratio was 0.74:1（256 males and 345 females,respectively). Patients aged 20-39 years accounted for the largest proportion. Non-marital sexual intercourse was the main route of infection. Forty-six patients (7.65%) were co-infected with other sexually transmitted diseases. A total of 251 cases of latent syphilis (41.76%) were confirmed when the patients were receiving tests for other sexually transmitted diseases or suspected sexually transmitted diseases. Of the 601 patients with EL,LL and unknown latency,the proportion of serum rapid plasma reagin(RPR) titers higher than or equal to 8 were 72.99% (127/174),52.94% (90/170),and 60.31%(155/257),respectively. Compared with the early syphilis,serological negative conversion rate was significantly lower after treatment for l2 months in the early latent syphilis patients (P=0.044). Conclusion Education and awareness raising on syphilis should be strengthened to lower the prevalence of latent syphilis.

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参考文献(12)

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