河海大学新校区图书馆SRC斜柱-BRB组合转换结构抗震设计

引用文献：

韩重庆崔绍贤王国承孙春丽孙逊. 河海大学新校区图书馆SRC斜柱-BRB组合转换结构抗震设计[J]. 建筑结构，2023，48（04）：120-127.

HAN Chongqing CUI Shaoxian WANG Guocheng SUN Chunli SUN Xun. Seismic design of SRC inclined column-BRB composite transfer structure in new campus library of Hohai University[J]. Building Structure，2023,48（04）：120-127.

作者：韩重庆崔绍贤王国承孙春丽孙逊

单位：东南大学建筑设计研究院有限公司东南大学土木工程学院

摘要：河海大学新校区图书馆外立面下部为一圈波浪形转换斜柱，上部为普通框架，整体结构下刚上柔，属于规则性超限高层建筑。采用RC框-剪结构时，小震、中震弹性计算所得结构各项指标均可满足规范要求，但大震弹塑性时程分析结果显示，楼板和剪力墙均出现了重度损伤。通过研究抗侧力构件各楼层剪力变化，发现刚度突变导致上部楼层水平地震作用放大，剪力墙地震作用通过楼板向转换斜柱转移，是导致结构重度损伤的主要原因。通过对比分析，最终采用外立面为SRC斜柱-BRB组合转换结构，内部为RC框架-BRB支撑结构的混合结构方案，所选结构与RC框-剪结构相比，中震弹性分析时，薄弱部位的楼板剪力减小约25%,大震弹塑性时程分析时，由于BRB屈服耗能，薄弱部位楼板剪力减小约66%,整体结构仅发生轻度损伤。按超限高层建筑性能设计的要求，对结构进行各地震作用水准下的受力分析，结果表明，该结构抗震性能良好。

关键词：斜柱；转换结构；屈曲约束支撑；减震；规则性超限高层建筑；

作者简介：韩重庆，博士，一级注册结构师，研究员级高级工程师，主要从事复杂结构设计、结构抗火、预应力空间结构等方面的研究，Email:chq_han@seu.edu.cn。

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参考文献[1] 建筑结构荷载规范：GB 50009—2012[S].北京：中国建筑工业出版社，2012.
[2] 钱昆.镜湖梅山广场南区酒店双向高位连体框架-支撑结构设计[J].建筑结构，2021,51(13):28-36.
[3] 韩重庆，陶健雄，傅强，等.苏州第二图书馆结构设计[J].建筑结构，2021,51(11):39-46.
[4] 朱莉莉.河口海岸大楼斜柱-悬挑梁转换结构设计[J].建筑结构，2020,50(S1):97-102.
[5] 冯玉龙，吴京，孟少平.屈曲约束支撑框架的支撑布置原则研究[J].工程力学，2016,33(12):104-111.
[6] 高层建筑混凝土结构技术规程：JGJ 3—2010[S].北京：中国建筑工业出版社，2011.
[7] 建筑抗震设计规范：GB 50011—2010[S].北京：中国建筑工业出版社，2010.
[8] 史杰，施泓，尹海鹏.招商银行深圳分行大厦主塔楼结构抗震性能化设计[J].建筑结构，2016,46(9):19-24.
[9] 冯冲冲，朱南海，贺小玲.建筑结构的屈曲约束支撑对其抗震加固性能的影响[J].地震工程学报，2019,41(2):353-359.
[10] 超限高层建筑工程抗震设防专项审查技术要点：建质[2015]67号[A].北京：中华人民共和国住房和城乡建设部，2015.
[11] 周敏，薛彦涛.BRB钢筋混凝土框架结构罕遇、极罕遇地震弹塑性分析[J].建筑科学，2017,33(5):25-30.

Seismic design of SRC inclined column-BRB composite transfer structure in new campus library of Hohai University

HAN Chongqing CUI Shaoxian WANG Guocheng SUN Chunli SUN Xun

(Architects & Engineers Co., Ltd.of Southeast University School of Civil Engineering, Southeast University)

Abstract: The new campus library of Hohai University is a regular over-limit high-rise building with a wave-shaped conversion inclined column under the facade and a common frame in the upper. The lower part of its overall structure is rigid, and the upper part is flexible. When RC frame-shear wall structure was used, the elastic calculation indexes of frequent earthquake and moderate earthquake could meet the requirements of the code, but the elastic-plastic time-history analysis results of rare earthquake show that the floor and shear wall have severe damage. By studying the change of story shear force of lateral load resisting members on each floor, it is found that the stiffness mutation leads to the amplification of the horizontal seismic action of the upper floor, and the seismic action of the shear wall transfers through floor to inclined column, which is the main reason for the severe damage of the structure. Though comparative analysis, the final solution adopts a hybrid structure scheme with SRC inclined column-BRB composite transfer structure on the outside, and RC frame-BRB support structure on the inside. Compared with the RC frame-shear structure, the floor shear of weak parts is reduced by about 25% in the elastic analysis of moderate earthquake. In the elastic-plastic time-history analysis of rare earthquake, the floor share of weak parts is reduced by about 66% and the overall structure was only slightly damaged due to yielding energy dissipation of BRB. According to the requirements of performance design of over-limit high-rise building, the stress analysis of the structure under various seismic action levels was carried out. The results show that the structure has good seismic performance.

Keywords: inclined column; transfer structure; buckling restrained brace; damping; regular over-limit high-rise building

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