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（廣東省建筑設計研究院， 廣州 510010）
［摘要］隨著復雜工程實踐經(jīng)驗增加，以及結構力學模型愈加精細、計算軟件功能顯著提升，有必要對高層結構不規(guī)則判別條件進一步完善。針對《抗規(guī)》第3.4.3條定義的6個不規(guī)則類型，探討了其力學概念以及當前執(zhí)行上存在的一些問題，提出了相應的修訂建議以供探討。具體建議包括：采用考慮與不考慮偶然偏心下豎向構件剪力增大系數(shù)來判別扭轉不規(guī)則；增加凸出部位寬度的限值用于凹凸不規(guī)則判別；增加樓層數(shù)的限值用于樓板局部不連續(xù)判別；增加樓層側向剛度比的上限值用于側向剛度不規(guī)則判別；增加不落地墻的截面面積占比或被托換柱的等效剪切剛度占比限值用于豎向抗側力構件不連續(xù)判別；增加層間抗剪承載力比的上限值用于樓層承載力突變判別。根據(jù)所建議的不規(guī)則判別條件，對31個超限高層結構進行判別，相比根據(jù)《抗規(guī)》判別的結果，平面不規(guī)則數(shù)量明顯減少，豎向不規(guī)則數(shù)量總體變化不大。
［關鍵詞］超限高層結構； 抗震設計； 平面不規(guī)則； 豎向不規(guī)則； 判別條件
中圖分類號：TU973文獻標識碼：A文章編號：1002-848X(2020)10-0028-11
Discussion and suggestion on discriminant condition of irregular items in high-rise structures
JIAO Ke, LAI Hongli, HU Cheng′en, WU Guiguang, YUAN Hui, PENG Zixiang
（Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China）
Abstract:It is necessary to further improve the discriminant condition of irregular items in high-rise structures with the increase of practical experience in complex engineering, increasingly refined structural mechanics models and significant improvement of computing software function. Six types of irregular items defined in Section 3.4.3 of the Code for seismic design of buildings (GB 50011—2010) with its mechanics concepts and some problems in current implementation were discussed, and corresponding revision suggestions were proposed. The specific suggestions include: the torsion irregularity is discriminated by considering and not considering the shearing force increase coefficient of the vertical member under the accidental eccentricity; the limit of the width of the convex portion is added to distinguish concave and convex irregularity; the limit of the number of stories is added to distinguish slab local discontinuity; the upper limit value of the lateral stiffness ratio between stories is added to distinguish the lateral stiffness irregularity; the proportion limit of the cross-sectional area of the non-falling wall or the equivalent shear stiffness of the underpinned column is added to discriminate the discontinuity of the vertical force resisting members; the upper limit value of shear bearing capacity ratio between stories is added to determine the sudden change of story bearing capacity. According to the proposed discriminant conditions, 31 out-of-code high-rise structures were discriminated. Compared with the discriminated results of Code for seismic design of buildings (GB 50011—2010), number of plane irregularities was significantly reduced, while the vertical irregular quantity had little change.
Keywords:out-of-code high-rise structure; seismic design; plane irregularity; vertical irregularity; discriminant condition
作者簡介：焦柯，碩士，教授級高級工程師，Email: 417335629@qq.com。
