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本文对烟囱在水平与竖向地震动分量联合作用下的反应进行了分析,分析中考虑了包含竖向地震动的几何非线性的影响。分析结果表明,水平地震应力起主要作用,竖向地震应力也不可完全忽视,在上部它可达重力应力的50％—90％。几何非线性对水平地震应力的影响较小。本文还对烟囱竖向地震荷载进行了分析,给出了竖向地震荷载的近似计算公式。
In this paper, the response of the chimney in combination with horizontal and vertical ground motion components is analyzed. The influence of geometric nonlinearity including vertical ground motion is considered in the analysis. The analysis results show that the horizontal seismic stress plays a major role and the vertical seismic stress can not be completely ignored. In the upper part, it can reach 50%-90% of the gravity stress. Geometric nonlinearity has less effect on horizontal seismic stress. This paper also analyzes the vertical seismic load of the chimney, and gives an approximate formula for the vertical seismic load.