罕遇地震作用下钢筋混凝土贮液池的抗震性能与加固研究

Seismic Performance and Reinforcement Method of Reinforced Concrete Liquid Storage Tanks under Rare Earthquake

贮液池在工业与民用建筑中有着广泛的用途,在地震中损坏将造成严重的后果,而已建贮液池的耐久性不断降低,因此对已建贮液池的抗震性能进行分析十分必要。本文建立了某钢筋混凝土贮液池的三维有限元模型,考虑地震动输入方向和贮液池的蓄水状态,对其进行罕遇地震作用下的静力弹塑性分析,并对破坏部分进行加固。结果表明:贮液池处于满水状态时较为不利;当地震动由+X向和-X向输入时,结构的位移比地震动由+Y向和-Y向输入时小,由于结构的不对称,当地震动由-Y向输入时,结构的位移最大,且结构整体的非线性程度显著;满水状态时,池内柱A2发生剪切破坏,采用高延性混凝土(HDC)加固可有效提高柱的抗剪承载力,为工程实践提供参考。

Liquid storage tanks have a wide range of uses in industrial and civil buildings.If a liquid storage tank is damaged in an earthquake,it would cause serious consequences.The durability of the built liquid storage tanks continue to decline,thus,it is necessary to analyze the seismic performance of the built liquid storage tanks.In this paper,a three-dimensional finite element model of a reinforced concrete liquid storage tank was established.Considering the input direction of the seismic motion and the storage state of the liquid storage tank,a static elasto-plastic analysis under rare earthquakes was carried out,and the damaged parts were reinforced.The results show that:the liquid storage tank is in a more dangerous condition when it is full of water;when the seismic motion input direction is+X and-X,the structure displacement is smaller than the structure displacement when the seismic motion input direction is+Y and-Y;due to the asymmetry of the structure,when the seismic motion input direction is-Y,the structure has the largest displacement in all cases and the overall nonlinearity of the structure is significant;when the liquid storage tank is full of water,the column A2 undergoes shear failure;reinforcing with high ductility concrete(HDC)can effectively improve the shear bearing capacity of the column.This study provided a reference for future engineering applications.