西安建筑科技大学学报(自然科学版)

为研究带端板连接可更换耗能梁段高强钢框筒结构(HSS-SFTS)的地震易损性,采用SAP2000软件建立20层、30层、40层HSS-SFTS典型算例模型,从PEER地震数据库中分别选取40条近场含脉冲型和40条普通远场地震波,基于增量动力法(IDA)获得算例在远、近场地震作用下的IDA曲线簇.同时,基于四水准抗震设防目标获得不同极限状态下的地震易损性曲线,并对HSS-SFTS进行地震易损性评估.结果表明:HSS-SFTS算例在四个不同设防水准下的超越概率均小于50%,满足“小震不坏、中震轻度损伤、大震可更换、巨震防倒塌”的抗震设防目标,具有良好的抗震性能; 各算例对应不同水准下近场脉冲型地震的超越概率均高于普通远场地震至少20%,表明近场脉冲型地震对结构的塑性损伤程度影响更大.

In order to study the seismic fragility of high-strength steel frame-and-tube structures(HSS-SFTS)with end-plate bolted connection of replaceable shear links, the finite element models of 20-story, 30-story and 40-story HSS-SFTS were established by using of SAP2000 software. From the PEER seismic database, 40 near-field pulsed and 40 ordinary far-field seismic waves were selected respectively, and the IDA curve clusters of the example under the action of far-field and near-field earthquakes were obtained based on the incremental dynamic method(IDA). At the same time, the seismic vulnerability curves under different limit states were obtained based on the four-level seismic fortification target, and the seismic vulnerability evaluation of HSS-SFTS was carried out. The results show that the exceedance probability of the HSS-SFTS example under the four different fortification levels is less than 50%, which can meet the seismic fortification aims of “no damage in small earthquakes, mild damage in moderate earthquakes, replaceable in large earthquakes, and anti-collapse in huge earthquakes”, and has good seismic performance. The surpass probability of near-field pulsed earthquakes corresponding to different levels of each example is at least 20% higher than that of ordinary far-field earthquakes, indicating that the near-field pulsed earthquakes have a deeper degree of plastic damage to the structure.

引言
1 算例设计
2 基于IDA的动力时程分析
3 HSS-SFTS结构地震易损性评估
4 结论

表1 F20算例截面尺寸(单位:mm)<br/>Tab.1 F20 section size(Unit: mm)

表1 F20算例截面尺寸(单位:mm)
Tab.1 F20 section size(Unit: mm)

表2 F30算例截面尺寸(单位:mm)<br/>Tab.2 F30 section size(Unit: mm)

表2 F30算例截面尺寸(单位:mm)
Tab.2 F30 section size(Unit: mm)

表3 F40算例截面尺寸(单位:mm)<br/>Tab.3 F40 section size(Unit: mm)

表3 F40算例截面尺寸(单位:mm)
Tab.3 F40 section size(Unit: mm)

图1 HSS-SFTS结构平、立面布置<br/>Fig.1 HSS-SFTS structure horizontal and vertical layout

图1 HSS-SFTS结构平、立面布置
Fig.1 HSS-SFTS structure horizontal and vertical layout

图2 剪切型耗能梁的非线性剪切铰<br/>Fig.2 Nonlinear shear hinge of shear links

图2 剪切型耗能梁的非线性剪切铰
Fig.2 Nonlinear shear hinge of shear links

图3 地震动频谱分析<br/>Fig.3 Ground motion spectrum analysis

图3 地震动频谱分析
Fig.3 Ground motion spectrum analysis

图4 HSS-SFTS算例塑性铰分布<br/>Fig.4 Plastic hinge distribution of HSS-SFTS

图4 HSS-SFTS算例塑性铰分布
Fig.4 Plastic hinge distribution of HSS-SFTS

图5 F20算例的IDA曲线簇<br/>Fig.5 IDA curve cluster of F20

图5 F20算例的IDA曲线簇
Fig.5 IDA curve cluster of F20

图6 F30算例的IDA曲线簇<br/>Fig.6 IDA curve cluster of F30

图6 F30算例的IDA曲线簇
Fig.6 IDA curve cluster of F30

图7 F40算例的IDA曲线簇<br/>Fig.7 IDA curve cluster of F40

图7 F40算例的IDA曲线簇
Fig.7 IDA curve cluster of F40

表4 Apg-θmax对数回归结果<br/>Tab.4 Apg-θmax logarithmic regression results

表4 Apg-θmax对数回归结果
Tab.4 Apg-θmax logarithmic regression results

表5 Sa(T1,5%)-θmax对数回归结果<br/>Tab.5 Sa(T1,5%)-θmax logarithmic regression results

表5 Sa(T1,5%)-θmax对数回归结果
Tab.5 Sa(T1,5%)-θmax logarithmic regression results

图8 远、近场地震下结构地震易损性曲线<br/>Fig.8 Seismic vulnerability curves of structures under far-field and near-field earthquakes

图8 远、近场地震下结构地震易损性曲线
Fig.8 Seismic vulnerability curves of structures under far-field and near-field earthquakes

表6 HSS-SFTS典型算例对应不同地震水准下的Sa(T1,5%)值<br/>Tab.6 Sa(T1,5%)values of HSS-SFTS typical examples corresponding to different seismic levels

表6 HSS-SFTS典型算例对应不同地震水准下的Sa(T1,5%)值
Tab.6 Sa(T1,5%)values of HSS-SFTS typical examples corresponding to different seismic levels

表7 远场地震下典型算例对应不同极限状态的超越概率<br/>Tab.7 Transcendence probabilities of typical examples corresponding to different limit states under far-field earthquakes

表7 远场地震下典型算例对应不同极限状态的超越概率
Tab.7 Transcendence probabilities of typical examples corresponding to different limit states under far-field earthquakes

表8 近场地震下典型算例对应不同极限状态的超越概率<br/>Tab.8 Transcendence probabilities of typical examples corresponding to different limit states under near-field earthquakes

表8 近场地震下典型算例对应不同极限状态的超越概率
Tab.8 Transcendence probabilities of typical examples corresponding to different limit states under near-field earthquakes

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备注

引言

1 算例设计

2 基于IDA的动力时程分析

3 HSS-SFTS结构地震易损性评估

4 结论

期刊信息