单体建筑抗震韧性评估方法研究与应用

选择已安装观测台阵的某教学楼为例，建立OpenSEES模型，利用振动数据识别结构自振特性标定数值模型，至两者结果吻合良好后，输入10条地震动开展结构弹塑性分析。结果表明楼层层间位移角均在规范限值下，结构抗震性能完好，建筑韧性仅考虑功能损失影响。依据吊顶和填充墙的易损性曲线中2种损伤状态的损失比和发生概率，计算该建筑结构的功能损失R_loss和建筑韧性R_function，结果表明该教学楼在罕遇地震下功能损失超过2/3，建筑韧性仅剩余1/3。计算结果与实际震害中“建筑主体结构完好，吊顶和填充墙等非结构构件破坏严重”结果相符。参考REDi方法对吊顶和填充墙进行功能修复时间评估，依据建筑功能(韧性)与累计恢复时间对应关系，得到建筑的抗震韧性曲线。

Research and application of evaluation methods for earthquake resilience of individual building structure

A teaching building instrumented with an observation array is selected for structural earthquake resilience evaluation, and the finite element model is built by using the Opensees software and calibrated with the natural characteristics identified from the ambient test. Until the simulated periods are consistent with the benchmark values, the model can’t be used for the resilience analysis. Furthermore, 10 earthquake data of ground motions are input for elastoplastic analysis. The results indicate that the inter-story drift ratios are lower than the specified limits, the earthquake resistant performance of the building structure is good, and the building resilience can be evaluated by only considering the loss of function. Based on loss ratio and occurrence probability of two damage states in the fragility curves for the suspended ceiling and infill wall, the loss of function and the building resilience are calculated. The earthquake resilience analysis of the teaching building suggests that in rare earthquakes the loss of function exceeds 2/3 and the remaining resilience is only 1/3. According to the REDi method used for evaluating the functional recovery time of suspended ceiling and infill wall, the building resilience curves can be attained by referring to the relationship between building function (resilience) and recovery time.