| The cliff-structure refers to a kind of structure built on the slope. The ground base of the same structure unit is located in different elevations and beneath the highest ground point; the floors are set up according to the floor height. This kind of structure is widely built in mountain cities, is a typical kind of structure built on slope. The special style of the structure leads to some problems such as structural irregularity at vertical level. That is why these structures' seismic response is different from that of regular structures. These structures' off layer features and the stiffness ratio between the upper ground portion and lower ground portion that can't be neglected. The earthquake actions and mechanical behavior of differe nt structures are similar but slightly different. So far, the frame structure and the frame-shear wall structure have obtained some research results. However, the shear wall structure hadn't some specific study. Therefore, It is necessary to study on seismic behavior of the shear wall structure built on the slope.This paper is based on the shear wall structure on the slope. Firstly the applicability of the conventional shear wall structure seismic model and analysis method for the shear wall structure on the slope is studied. Next it is analyzed that seismic performance of the shear wall structure on the slope under rare and frequent earthquake; The mechanical behavior and seismic performance of the shear wall structure on the slope are studied through a number of examples on structural arrangement between the upper ground portion and lower ground portion and different off layers. The main conclusions are achieved as follows:(1) It is concluded that simply using pseudo three-dimensional model to do analysis and calculation is inappropriate when the three-dimensional model is under stress in the transverse slope.(2)For the shear wall structure on the slope, different types of the upper ground portion and lower ground portion will produce different shear stiffness ratio, that has a significant impact on the seismic performance of the structure.(3) Except the part under the swap layer, the biggest difference between the conventional structure ground and the structure on the slope plane is shear force distribution on the story connecting to the top ground of slope structure. The part disconnecting to the ground within the story bear small large shear and t he part connecting to the ground within the story bear large shear. So the part within the story is wake.(4) The number of the off layers main influence on the story connecting to the top ground of slope structure? While the number of the off layers is greater, it is worse for the part connecting to the ground within the story connecting to the top ground. Stiffness ratio affect the shear force distribution of each layer. Increasing stiffness ratio can improved condition that the part connecting to the ground within the story bear large shear. While the stiffness ratio of the upper ground portion and lower grou nd portion is bigger, the structural members disconnecting to the ground in the story connecting to the top ground will share greater proportion of the storey shear force, which is good for the structural members connecting to the ground in this story.(5) Under the earthquake the part on the swap layer and the part under the swap layer which are two parts of the structure behave a separate structure, which is different from ordinary flat structure.The part on the swap layer is mainly affected by the overall stiffness of the structure, while the part under the swap layer by mainly affected by the stiffness ratio of the upper ground portion and lower ground portion.(6) After entering elastic-plastic, the wall connecting to the ground in the story connecting to the top ground is more serious than conventional structure. The number of the off layers is more, this phenomenon is more obvious. While increasing stiffness ratio, this phenomenon can be reduced. |
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