一、前言 从1968年开始,钢筋混凝土离心方管曾在四川一些单层厂房屋架中大量采用,对三线建设发挥了一定的作用。接着武汉地区曾用于单层厂房的柱子及吊车梁中,后来又陆续推广应用于多层民用与工业建筑的柱子中。经过初步实践证明这是一种适应性较强的截面形式。便于工厂化生产,离心构件质量好,节省钢材,水泥和木材;特别是在多层建筑中它可以保持 I. INTRODUCTION Since 1968, reinforced concrete centrifuge pipes have been used in a large number of single-storey house racks in Sichuan and have played a role in the construction of the third line. The Wuhan area was then used in pillars and crane beams in single-storey buildings, and later it was successively promoted in columns for multi-level civil and industrial buildings. After preliminary practice has proved that this is a more flexible form of cross-section. Facilitate factory production, centrifugal components are of good quality, steel, cement and wood are saved; especially in multi-story buildings it can be maintained