设置黏滞消能器的超限高层结构设计
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（甘肃省建筑设计研究院， 兰州 730030）
［摘要］天星科技大厦位于8度地震区，主楼高179.3m，超过了B级高度钢筋混凝土高层建筑的最大适用高度，采用钢筋混凝土框架-核心筒结构，设置了黏滞消能器。对结构进行的消能减震计算分析表明，消能减震结构比常规结构在地震作用下的底层剪力减小了约25%，最大层间位移角减小了约13%。采用动力时程分析方法对附加阻尼比进行了验证，证明附加阻尼比取用3%是合理而安全的。对结构进行了抗震性能化设计，采取了有针对性的加强措施。大震动力弹塑性分析表明，整体结构损伤较轻，具有充分的消能和抗震能力，有一定的安全富裕度。个别连梁塑性铰发展较深，大多数框架柱未出现塑性铰，剪力墙产生了受拉裂缝，但是钢筋未屈服，与消能器相连的构件损伤轻微，可保证消能器正常工作，最后对与消能器连接的设计提出了建议。［关键词］黏滞消能器; 超限高层; 消能减震; 附加阻尼比; 抗震性能化设计中图分类号：TU973.3+1 文献标识码：A 文章编号：1002-848X(2016)11-0027-06
Structural design of an out-of-code high-rise building with viscous energy dissipation deviceZhang Jutao, Zheng Shijun, Zhang Haoqiang(Gansu Architectural Design and Research Institute, Lanzhou 730030, China)Abstract: Tianxing Science and Technology Building is located in 8-level seismic intensity region with height of 179.3m exceeding the most suitable height of B-class reinforced concrete high-rise building. The building adopts structural system of reinforced concrete frame-corewall structure with viscous energy dissipation device. Energy dissipation analysis of the structure shows that, compared with conventional structure, the bottom shear of energy dissipation structure is reduced by about 25% and the largest interlayer displacement angle is reduced by about 13% under the earthquake. Dynamic time-history analysis method was used to verify additional damping ratio to show that taking 3% as additional damping ratio is reasonable and safe. Performance-based seismic design method was used and specific strengthening measures were adopted. Dynamic elastic-plastic analysis under the rare earthquake shows that, the suffering damage to overall structure is slight and the structure has sufficient energy dissipation, seismic ability and security reserve. The development of plastic deformation is deep in few coupling beams and there are no plastic hinges in most of the frame columns. Tensile cracks appear in some shear walls but rebar in it does not yield. Components connected to viscous energy dissipation device can work normally with slight damages. Finally, design suggestions on the connection with energy dissipation device were proposed.Keywords: viscous energy dissipation device; out-of-code high-rise building; energy dissipation; additional damping ratio; performance-based seismic design
作者简介：张举涛，硕士，教授级高级工程师，Email：zhjut@126.com。
