随着炼油厂规模的扩大,各种装置中的框架、管架有增大柱距的趋势。如我们在东方红炼油厂第二套催化裂化装置中首次采用了9m的柱距。柱距加大后,梁上的荷载将增加。用普通钢筋混凝土梁不但截面高、自重大,且不易满足刚度和抗裂性要求。 With the expansion of the scale of refineries, the frame and pipe racks in various devices tend to increase the column spacing. For example, we used the 9m column spacing for the first time in the second catalytic cracking unit of Dongfanghong Refinery. As the column distance increases, the load on the beam will increase. The use of ordinary reinforced concrete beams not only has a high section and self-heavy section, but also does not easily meet the requirements for stiffness and crack resistance.