弧形混凝土结构温度应力计算研究

Calculation of Temperature Stress in Curved Concrete Structure

对弧形混凝土结构温度应力的计算研究表明,弧形结构的环向应力沿高度方向基本一致,可以简化为拱单元计算,拱单元的支座约束可以用“等效暗柱”来计算;结构两侧温差对弧形结构的环向应力的影响较轴线温差变化的影响更大,控制温度裂缝主要是控制结构物两侧的温差.通过设置滑动层,减小结构的抗侧移刚度,则弧形混凝土结构可以作无缝设计.

After careful calculation about crack control in the curved concrete structure, it demonstrated that the ring stress is in the same direction along the height. The structures can be simplified into arch elements. The support restriction can be analyzed through 揺quivalent column?method. The ring stress due to temperature difference in the two sides of the structure is more influential than that due to axial temperature difference. Thus the former should mainly be considered to control the structural crack. It is wise to adopt slip layer, and thus reducing the stiffness against lateral deformation. Then curved concrete structures can be designed as non-crack ones.