地震作用下立筒群仓贮料侧压力试验研究

为了研究地震作用下贮料对仓壁侧压力的变化规律,设计制作了立筒群仓结构1/16整体模型,并对其进行了模拟地震振动台试验,测试了模型结构在静态压力作用下以及在7度多遇、7度基本、7度罕遇和8度罕遇烈度地震作用下贮料对仓壁的侧压力值,并与Janssen理论计算值及规范设计值进行比较,得到了在地震作用下贮料对仓壁的侧压力的变化规律,试验结果表明:与单仓相比群仓具有较好的抗震性能,在7度抗震设防地区进行钢筋混凝土筒仓抗震设计时,仓壁按照规范设计值进行配筋是安全的,但需要对仓顶部分进行加强。

Experimental study on lateral pressures acting on the wall of a group of granular silos induced by earthquakes

In order to study the earthquake effect on lateral pressures acting on the wall of a set of cylinder granular solids,1/16th structural model of the solids is made to simulate the shaking table test.It is tested for the side wall pressures of the solids under the case of static storage materials as well as the earthquakes of more than 7 degrees,7 degrees basic,7 degrees and 8 degrees.Afterwards,the tested results are compared with Janssen theory and his standard design values,then the variation of the side pressures on the wall of silos due to storage materials induced by earthquakes is presented.Further more,it is shown that the seismic performance of a group of granular solids is verified much better to be compared with a single granular solid,another achievement obtained from the experimental study is that it is safe for the wall of the solids to be designed according to the current Chinese Specifications for the reinforcements in 7 degree earthquake areas,whereas reinforcements on the top part of the solids should be strengthened.