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本文以跨度为15m的单层柱面网壳为研究对象,利用El—Centro地震波,通过对其长跨比、矢跨比的改变,分析了单层柱面网壳斜杆和纵杆地震动应力峰值的变化规律。结果表明,斜杆地震动应力峰值与纵杆地震动应力峰值相比较大;随长跨比增大,斜杆和纵杆地震动应力峰值增大,但当长跨比大于2.6时,略为减小;矢跨比变化对斜杆和纵杆地震动应力峰值变化的影响规律受长跨比选取的影响。
In this paper, a single-layer cylindrical reticulated shell with a span of 15m is selected as the research object. By using the El-Centro seismic wave, the long-span ratio and the ratio of longitudinal to span of single- Stress peak changes. The results show that the peak value of diagonal bar ground motion is larger than that of longitudinal bar. As the span ratio increases, the peak values of diagonal bar and longitudinal bar stress increase, but when the span ratio is larger than 2.6, the peak value is slightly reduced The influence law of the change of sag-span ratio on the peak change of seismic stress of diagonal bar and longitudinal bar is affected by the selection of long-span ratio.