A new type of isolation bearing with low carbon,low cost and light mass was designed for rural buildings by using reinforced reconstituted bamboo plate instead of steel plate.The compressive shear static loading test of the reinforced reconstituted bamboo plate was carried out.The results show that the cracks appear along the grain direction when the pressure is 20MPa.When pressure is 5MPa and the shear is 1.5MPa,there are a few cracks in the transverse direction,the reconstituted bamboo board can meet the bearing requirements of rural buildings.Taking a two-story rural building in Wenchuan County in Sichuan Province as an example,the foundation isolation scheme of the building was designed by using the new bearing,and the pseudo-static tests of the support under the action of small,medium and large earthquakes were carried out.The results show that during a small earthquake,the bamboo plate did not crack,the longitudinal shear stiffness of the support is about 20%higher than that of the transverse,and the equivalent damping ratio is about 5%for both transverse and transverse.During medium earthquake,there are a few cracks in the bamboo plate,the support still has integrity,its horizontal and transverse stiffness decreases,and the damping ratio increases slightly.During large earthquakes,there are more cracks in the bamboo plate,but the support can still carry the load effectively,and its longitudinal and transverse stiffness are further reduced,the damping ratio is increased to 7%～10%.In large earthquakes,after cyclic loading along the transverse grain for 20 times,the equivalent stiffness of the support is slightly reduced,and its effective damping ratio is increased to 20%,which can effectively resist the influence of multiple aftershocks of the main earthquake.Therefore,the new isolation bearing is feasible.
维普
万方数据
