非对称线型体外预应力梁自振频率特性分析

Analysis of natural frequency of externally prestressed concrete beams with asymmetric configuration

体外预应力技术在结构加固等方面具有独特的应用优势.为了全面分析体外索各种线型布置下体外预应力梁的动力性能,运用结构动力学知识给出了较为精确的体外索非对称线型布置的体外预应力简支梁自振频率计算公式.Ayaho Miyamoto等人给出的只适用于体外索对称线型布置的体外预应力梁自振频率计算公式在取相应的对称线型系数时,经验算,与其是一致的,因此体外预应力自振频率计算公式得以修正和扩充.

The prestressing technique using external tendons has unique advantages in strengthening structure. In order to investigate the dynamic behavior of prestressed beams, with different configurations of external tendons, formulae for frequency calculation are presented, based on structure dynamics, with external tendons asymmetrically arranged. Moreover, by calculating on corresponding symmetric coefficient, the formula has consistent result with the formula only suited to the ease of symmetrically arranged external tendons, presented by Ayaho Miyamoto. The formula is improved and extended.