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地震作用下,水塔中的蓄水对水塔结构本身有着耗能减震作用。为研究不同蓄水量对钢筋混凝土倒锥壳式水塔结构抗震性能的影响规律,探寻有利于该类水塔结构抗震的蓄水水位,基于实际工程结构,依据相似原理设计制作了相似比为1∶30的有机玻璃倒锥壳式水塔模型。通过振动台试验,在不同水准的多条地震波激励下,研究了水塔模型在不同水位时的动力特性、加速度响应和位移响应。运用ABAQUS有限元软件进行数值模拟,并将试验结果和有限元分析结果进行验证和对比分析,结果表明:随着水位的增加,模型的自振周期逐渐增大;地震作用下,不同水位会不同程度地减小水塔模型的动力响应;不同地震波激励下,当蓄水水位在水箱最高水位的一半以上时,减震效果良好。
Under the action of an earthquake, the water in the water tower has the function of energy dissipation and shock absorption on the water tower itself. In order to study the influence law of different water storage capacity on seismic performance of inverted conical water tower with reinforced concrete structure and to find out the water level that is conducive to the seismic resistance of such water tower structure, based on the actual engineering structure, 30 plexiglass inverted cone shell water tower model. Through the shaking table test, the dynamic characteristics, acceleration response and displacement response of water tower model at different water levels are studied under different levels of seismic excitation. The ABAQUS finite element software is used to simulate the numerical results. The results of the test and finite element analysis are verified and compared. The results show that the natural vibration period of the model increases with the increase of water level, The dynamic response of the water tower model is reduced to a certain extent; under different seismic waves excitation, the damping effect is good when the water storage level is more than half of the highest water level of the water tank.