| 张道明*,吕春,王丽.体外预应力索与简支梁耦合振动的特性[J].实验力学,2015,30(4):529~535 |
| 体外预应力索与简支梁耦合振动的特性 |
| On the Coupled Vibration Characteristics of External Prestressing Tendon and Simply Support Beam |
| 投稿时间：2014-11-06 修订日期：2015-04-16 |
| DOI：10.7520/1001-4888-14-229 |
| 中文关键词: 体外预应力索 振动频率 扫频试验 耦合振动 |
| 英文关键词:external prestressing tendon vibration frequency frequency sweep test coupled vibration |
| 基金项目:黑龙江省教育厅科学技术研究项目(项目编号：12541884); 黑龙江省高等学校教改工程项目(项目编号：JG2013010012) |
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| 中文摘要: |
| 体外预应力结构是一种由体外索和普通结构组成的预应力组合结构,被广泛地应用在各类结构中。基于体外预应力索与梁耦合振动的振动特性,建立体外预应力梁振动模型,推导出了不同体外预应力束线型等直线弹性梁的自振频率方程。在体外预应力钢束混凝土梁电磁激振器扫频试验中,测试了不同预应力条件下梁的基频。理论和试验研究表明体外预应力束线型、预应力束拉伸刚度和梁振型模态对梁自振频率的影响是明显的。 |
| 英文摘要: |
| External prestressing structure is a type of prestressing composite structure composed of external tendons and general structure and is widely applied in various structures. Based on coupled vibration characteristics of beam and external prestressing tendon, the vibration model of external prestressing beam was established and free vibration frequency equation of straight elastic beam with different types of external prestressing tendon was derived. In electromagnetic exciter frequency sweep experiment of concret beam with external prestressing reinforced steel tendon, the fundamental frequency of beam under different prestressing conditions was measured. Theoretical and experimental results show that the influence of the external prestressing tendon type, the tencile rigidity of prestressing tendon and the vibration mode of beam on the free vibration frequency of beam is obvious. |
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