不等高单层厂房高低跨交接柱考虑高阶振型影响的地震内力分析

本文应用地震反应谱理论分析了高阶振型对不等高单层厂房高低跨交接柱上柱的影响,指出现行TJ 11-78规范有关条文的不足和偏于不安全,并通过对193例不同类型厂房的统计分析提出了相应的建议公式。分析中分别按平面结构体系及同时考虑山墙、屋盖、柱等共同工作的空间结构体系,归纳出主要的影响因素及其规律。建议公式较TJ11-78相应公式有较高的准确度,为该规范的修订提供了有价值的参考依据。

Seismic Analysis on the Upper Parts of Intermediate Columns of Single-Story Factory Building with Unequal Heights Considered High Vibration Mode Effect

In this paper the influences of the high vibration mode of the single-story factory building with two spans of unequal heights on its upper parts of the intermediate columns were investigated by using the theory of seismic response spectrum. Also, the insufficiency and lower safety of the concerning items in current Code TJ 11-78 were pointed out. The corresponding recommending formula was presented based on the statistic analysis of 193 different types of factory buildings. The essential factors and rules were summarized up according to the plan structure system considering its joint work of space structure system with gables, roofs, columns etc. The recommending formula possesses higher accuracy than the formula of Code TJ 11-78 and provides a valuable reference for modifying the current Code.