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(1 湖南大學(xué)土木工程學(xué)院， 長沙 410082； 2 中機(jī)國際工程設(shè)計研究院有限責(zé)任公司， 長沙 410007)
［摘要］為探究帶設(shè)備層超限高層建筑的抗震性能，以位于長沙的超高層公寓式辦公樓實(shí)際工程為背景，研究了設(shè)備層對結(jié)構(gòu)整體參數(shù)及抗震性能的影響，重點(diǎn)探討了樓層側(cè)向剛度比的計算方法和改善樓層受剪承載力比的措施。分析結(jié)果表明，設(shè)備層的存在會引起本層框架分擔(dān)剪力比的大幅度增大，但框架柱剪應(yīng)力仍處于較低水平；設(shè)備層對結(jié)構(gòu)周期、基底剪力及框架分擔(dān)傾覆力矩比的影響可忽略不計；設(shè)備層層高突變未引起樓層塑性變形集中及結(jié)構(gòu)損傷集中，罕遇地震驗(yàn)算結(jié)果表明結(jié)構(gòu)體系合理，表明按高規(guī)算法考慮層高修正計算樓層剛度比可行；提高墻身水平筋配筋率的措施對改善樓層受剪承載力比最有效。
［關(guān)鍵詞］超限高層建筑；框架-核心筒結(jié)構(gòu)；設(shè)備層；側(cè)向剛度比；受剪承載力比
中圖分類號：TU973 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)21-0047-07
Strucutral design and analysis of an overrun high-rise building with mechanical floor
XU Yafei1,2, TAN Guangyu2
(1 College of Civil Engineering, Hunan University, Changsha 410082， China；2 China Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410007， China)
Abstract: In order to explore the seismic performance of overrun high-rise buildings with mechanical floor, based on the actual project of super high-rise apartment office building in Changsha, the influence of mechanical floor on the overall parameters and seismic performance of the structure was studied, with emphasis on the calculation method of floor lateral stiffness ratio and the measures to improve the shear bearing capacity ratio of floors. The analysis result shows that the existence of the mechanical floor greatly increase shearing ratio of the frame partakes in this floor, but shear stress of the frame column is still at a relatively low level. The influence of mechanical floor on structural cycle, base shear force and overturning moment ratio of the frame partakes is negligible. The abrupt change of mechanical floor does not cause the concentration of floors’ plastic deformation and structural damage. The checking calculation of rare earthquake shows that the structural system is reasonable and it is feasible to consider floor height according to the height gauge algorithm and compute stiffness ratio of floors correctly. The measures to increase the horizontal reinforcement ratio of walls are the most effective to improve bearing capacity ratio in shear for the floors.
Keywords:overrun high-rise building； frame-corewall structure； mechanical floor； lateral stiffness ratio； bearing capacity ratio in shear
作者簡介：徐亞飛，碩士，一級注冊結(jié)構(gòu)工程師，Email:151865782@qq.com。
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