连鸣 周玉浩 韩文凯

摘 要：为了研究带可更换剪切型耗能梁段的高强钢框筒结构（HSS-FTS-RSL）的抗震性能，设计了2∶3缩尺子结构试验试件，对其进行低周往复加载，研究其破坏模式、滞回性能及耗能梁段的可更换能力。基于OpenSees建立了HSS-FTS-RSL结构的简化数值分析模型，数值分析结果与试验结果吻合良好。建立了3种不同耗能梁段布置方式的HSS-FTS-RSL整体结构简化数值模型，对其进行非线性时程分析。結果表明：HSS-FTS-RSL子结构试件具有良好的抗震性能，在循环荷载下表现为耗能梁段的破坏;更换耗能梁段不会影响结构的抗震性能;结构在地震作用下的变形满足规范限制要求;在构件截面尺寸相同，即相同用钢量的前提下，采用高强钢可以有效降低构件的应力水平;耗能梁段最大可更换残余层间侧移角为0.41%，且在大震后整体结构残余层间侧移角为0.028%～0.148%，可以实现耗能梁段的更换;基于不同耗能梁段布置方式的HSS-FTS-RSL分析结果，建议HSS-FTS-RSL结构耗能梁段采用三跨间隔布置。

关键词：钢框筒;剪切型耗能梁段;试验研究;抗震性能;简化模型

中图分类号：TU392.5; TU352.1 文献标志码：A 文章编号：2096-6717（2021）03-0024-13

Abstract： High-strength steel fabricated framed-tube structure with replaceable shear link （HSS-FTS-RSL） was proposed. One 2/3 scaled sub-structure specimen of HSS-FTS-RSL was fabricated. Low cycle reciprocating loading test was carried out for the specimen to study its seismic performance， including failure modes， hysteretic behaviors， and replaceability. The simplified numerical model of HSS-FTS-RSL was established by using OpenSees， and the analysis results of this model had good agreement with the test results. Three simplified numerical models of HSS-FTS-RSL with different layouts of shear links were considered to investigate their seismic performance through the nonlinear dynamic analysis. The results show that the specimen had good seismic performance，

with the failure of energy dissipation beam section under cyclic loading. The maximum interstroy drifts could meet the demands in the seismic code under the ground motions. The high-strength steel could reduce the stress in spandrel beams and columns but not increased the amount of steel of the structures. The maximum residual story drifts ranged from 0.028% to 0.148%， which were lower than the maximum residual story drift of 0.41% for replacing shear links obtained from the test. Considering the seismic performance and repairability of the structure， it was suggested that the shear links of HSS-FTS-RSL should be arranged in three-span interval according to the analysis results.

Keywords： steel framed-tube structure; shear link; experimental study; seismic performance; simplified numerical analysis

钢框筒结构是由外围密柱深梁、楼板和内部少量柱形成的筒体结构，框筒结构具有空间受力性能良好，抗扭及抗侧刚度大等优点，但由于钢框筒结构深梁密柱（一般约为3～4 m）的特点，导致裙梁的跨高比较小，从而使得裙梁端部弯矩梯度偏大，限制了群梁端部塑性铰的形成和发展，不利于结构耗散地震能量;同时，裙梁被楼板加强，可能导致地震作用下部分柱子的端部先于裙梁进入塑性，加大了结构的倒塌风险，损伤严重时，将导致建筑物的功能中断，产生较高的修复成本。……