- 摘 要
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(廣東省建筑設(shè)計研究院有限公司， 廣州 510010)
［摘要］針對超限高層結(jié)構(gòu)設(shè)計中構(gòu)件抗震性能分析存在若干問題進行探討。對底部加強區(qū)主要墻肢和扭轉(zhuǎn)變形較大的豎向構(gòu)件，常規(guī)的加強方法是提高其承載力，但會造成結(jié)構(gòu)的耗能能力降低，反而對抗震不利。根據(jù)其作為結(jié)構(gòu)第一道防線的耗能特點，提出了通過提高其延性的方式進行加強。對弱連接樓板損壞情況，常規(guī)的構(gòu)件加強方式是使其滿足設(shè)防地震作用下不屈服要求，但在罕遇地震作用下該處的構(gòu)件損壞較嚴重。說明弱連接樓板僅滿足設(shè)防地震作用下的不屈服要求不能有效保證結(jié)構(gòu)平面的完整性。建議將弱連接處的樓板和框架梁定義為關(guān)鍵構(gòu)件，以及在罕遇地震作用下樓板滿足抗拉不屈服和抗剪截面驗算。
［關(guān)鍵詞］關(guān)鍵構(gòu)件；底部加強區(qū)；扭轉(zhuǎn)變形；弱連接樓板；抗震性能
中圖分類號：TU973 文獻標識碼：A文章編號：1002-848X(2021)18-0085-07
Discussion on some practical problems about seismic performance analysis of tall building structures beyond code limit
WU Guiguang, JIAO Ke, LAI Hongli, YUAN Hui
(GuangDong Architectural Design & Research Institute Co., Ltd., Guangzhou 510010， China)
Abstract: Some practical problems about seismic performance analysis of tall building structures beyond code limit were discussed. Conventional strengthening methods is to improve the bearing capacity of bottom strengthening area of the main wall-pier and corner vertical member with large torsional deformation, but it will reduce the energy dissipation capacity of structure, which is disadvantageous for earthquake resistance. According to its characteristic of energy dissipation as the first defense system of the structure, it is proposed to improve the ductility of members. In the case of damage of components of the weak-linking slab, conventional strengthening methods of components is to meet the non-yielding requirements according to the seismic resistance, but the damage of components is the more serious under rare earthquakes. It is shown that the weak-linking slab can not guarantee the integrity of the structural plane effectively only meet the non-yielding requirements under seismic resistance. It is suggested that the slab and the frame beam of the weak-linking part should be defined as the key components，and meet tensile the non-yielding and the shear section under rare earthquake.
Keywords:key component； bottom strengthening area； torsional deformation； weak-linking slab； seismic performance
作者簡介：吳桂廣，碩士，高級工程師，Email：446444011@qq.com。
