【摘要】 以8度区(0.2g)某悬挑28 m的三角形管桁架雨棚为研究对象。输入调整后的地震波,分别按双向水平地震作用和三向地震作用这两种工况,对三角形管桁架雨棚进行线性时程分析。做出这两种工况作用下有代表性的节点位移曲线和杆件轴力、弯矩时程曲线并进行对比分析。结果表明,线性时程分析不宜忽略竖向地震分量;同时,在对三角形管桁架雨棚进行三向地震波输入时,其加速度最大值宜考虑1∶0.85∶0.65和0.85∶1∶0.65两种情况。更多还原

【Abstract】 The district 8 degrees( 0. 2g) 28 m a triangular truss cantilevered steel canopy was studied. Entering the adjusted seismic waves,under the three and bi-level earthquake to the seismic action of these two conditions,the triangular truss canopy of linear time history respectively was analyzed. Both made representative of the role of nodal displacement curves and rod axial force,moment-time curve and analyzed under conditions. The results showed that the linear time history analysis should not ignore the vertical seismic component. Meanwhile,in the triangular truss canopy of three-wave input to the earthquake,the maximum acceleration should consider 1 ∶ 0. 85 ∶0. 65 and 0. 85∶ 1∶ 0. 65 these two cases.更多还原