双层柱面组合网壳的滞回特性模拟

Hysteresis trait of double deck cylinder composite shell

针对单层网壳跨度小和双层网壳耗钢量大的缺点,应用大型通用有限元软件ANSYS对双层柱面组合网壳进行了滞回特性分析。介绍了双层柱面组合网壳具有跨度大和低耗钢量等。它充分利用了混凝土的高抗压强度和低廉的造价,采用钢筋混凝土上弦板来代替一般网壳的上弦杆,从而形成了一种钢结构与钢筋混凝体结构协同工作的组合结构,即双层柱面组合网壳。组合网壳是一种受力合理的空间结构,也是一种板系、梁系与杆系协同工作的结构体系。国内外对双层柱面组合网壳结构在地震和低周期反复荷载作用下滞回特性的研究很少,着重对地震和低周期反复荷载作用下的双层柱面组合网壳结构进行研究分析,得出双层柱面组合网壳结构的频谱相当密集;其具有良好的抗震性能,其滞回曲线比较饱满,未发生捏缩现象。双层柱面组合网壳是一种很有发展潜力的结构形式。

In the light of shortcoming of single-layer shell's small span and double-deck shell's large consumption of steel, the article studies hysteresis trait of double deck cylinder composite by ANSYS. The article introduces the characteristic of high compression and cheap price. In the composite shell, the upper chords are substituted by concrete upper plate, which forms a kind of composite structure of steel and reinforced concrete and they work together. Composite shell which is composed by plate, beam and bars is a kind of reasonable space structure. Hysteresis of double deck composite shell has been rarely studied under earthquake and low cycle and repeated loads both at home and aboard. Double deck composite shell is studied under earthquake and low cycle repeated loads in the article, and discover the frequency spectrum is quite dense; and it has good performance of earthquake-proof because its hysteresis curves are chubbiness and rheostriction hasn't been found. Double deck composite shell is a promising structural style.