以仿古中式三层阁为研究对象,建立了力学抗震分析模型.对结构整体分别施加人工波和天然波2种地震波,并进行时程分析,得到X和Y方向的层间位移.研究表明:模型X向层间位移比Y向小,说明X向侧移刚度与Y向相比较大;模型的1-3层的层间位移角远小于弹性限值1/550,结构刚度偏大;减少墙、柱竖向构件的截面面积,或减少梁柱数量,对结构力学的性能影响不大.为提高结构整体刚度,需加大Y向侧移刚度,这可以通过加大Y向截面尺寸来实现.
A mechanic seismic analysis model is constructed with the pseudo-classic three-storey Chinese- style attic as the study object. Applying the artificial wave and the natural wave to the structure,we obtain the storey displacement in X direction and Y direction through time-procedure analysis. The research shows that the displacement in X direction is smaller than that in Y direction, which indicates that the lateral stiffness in X direction is larger than that in Y direction. The 1-3 storey displacement angle is far less than the elasticity limit 1/550 ,which indicates that the structural stiffness is large. Reduction in the cross-sectional areas of walls and pillar and reduction in the number of beams and pillars have little effect on the structural mechanic performance. To increase the integral stiffness, it is necessary to increase the lateral stiffness in Y direction which can be realized through increasing the cross-section area in Y direction.