传力构件在矩形钢管混凝土结构中的作用

APPLICATION OF TRANSMISSION COMPONENTS IN RECTANGULAR CONCRETE-FILLED STEEL TUBE STRUCTURE

在矩形钢管混凝土柱内部设置传力构件,解决了现有的钢管混凝土柱中钢管与混凝土难以共同受力的问题。在保证矩形钢管混凝土柱实现共同工作的前提下,实际应用中是否每层柱子均需要设传力构件有待进一步研究。利用有限元软件ABAQUS建立一个简化的30层框架模型,从弹塑性控制设计角度考虑,研究分析如何合理经济地布置传力构件,使其达到较好的传力效果,充分发挥传力构件的连接分配作用。分析塑性阶段混凝土分担系数的变化原因,进一步说明在弹塑性阶段控制设计时采用设传力构件的矩形钢管混凝土结构,如过多或过少设分配梁均不能达到理想的分配效果;合适的数量、合理的位置能够得到较好的工作性能。分析表明:每4~8层设传力构件数量可达到既经济又合理的效果。

Setting transmission member in rectangular concrete-filled steel tube column,can solve the problems that it is difficult to work together for rectangular concrete-filled steel tube column.Under the premise of assuring interaction for concrete-filled steel tube column,whether transmission member need to be set in column of each floor in the practical application has to be studied further.A simplified 30-storey frame model was established by using the finite element software ABAQUS,and in terms of elastic-plastic control design,the paper researched and analyzed how to decorate transmission member reasonably and economically to reach better force effect,and make full use of connection and distribution for transmission components.The reason was analyzed that the coefficient of bearing capacity shared by concrete changed when it was in the plastic stage,which further showed that for rectangular concrete-filled steel tube structure with transmission member,when it was in elastic-plastic phase control design,too little or too much distribution beams couldn′t achieve the ideal effect,moreover,if the number was appropriate and the position was reasonable it showed the better performance.It should be economical and reasonable to set transmission member every 4 to 8 storeys.