設(shè)置黏滯消能器的超限高層結(jié)構(gòu)設(shè)計(jì)
張舉濤，鄭世鈞，張昊強(qiáng)
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（甘肅省建筑設(shè)計(jì)研究院， 蘭州 730030）
［摘要］天星科技大廈位于8度地震區(qū)，主樓高179.3m，超過了B級高度鋼筋混凝土高層建筑的最大適用高度，采用鋼筋混凝土框架-核心筒結(jié)構(gòu)，設(shè)置了黏滯消能器。對結(jié)構(gòu)進(jìn)行的消能減震計(jì)算分析表明，消能減震結(jié)構(gòu)比常規(guī)結(jié)構(gòu)在地震作用下的底層剪力減小了約25%，最大層間位移角減小了約13%。采用動(dòng)力時(shí)程分析方法對附加阻尼比進(jìn)行了驗(yàn)證，證明附加阻尼比取用3%是合理而安全的。對結(jié)構(gòu)進(jìn)行了抗震性能化設(shè)計(jì)，采取了有針對性的加強(qiáng)措施。大震動(dòng)力彈塑性分析表明，整體結(jié)構(gòu)損傷較輕，具有充分的消能和抗震能力，有一定的安全富裕度。個(gè)別連梁塑性鉸發(fā)展較深，大多數(shù)框架柱未出現(xiàn)塑性鉸，剪力墻產(chǎn)生了受拉裂縫，但是鋼筋未屈服，與消能器相連的構(gòu)件損傷輕微，可保證消能器正常工作，最后對與消能器連接的設(shè)計(jì)提出了建議。［關(guān)鍵詞］黏滯消能器; 超限高層; 消能減震; 附加阻尼比; 抗震性能化設(shè)計(jì)中圖分類號(hào)：TU973.3+1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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
作者簡介：張舉濤，碩士，教授級高級工程師，Email：zhjut@126.com。
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