- 摘 要
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(華南理工大學建筑設計研究院有限公司， 廣州 510641)
［摘要］由于坡地建筑建造于山地之上，其風荷載取值和地震作用均較平地建筑有一定的放大效應。同時由于坡地建筑存在底部不等高嵌固的特點，其結構設計指標往往難以滿足現行規(guī)范設計要求。另外，山坡地區(qū)工程地質情況復雜，地勢起伏變化，持力層埋深深淺不一，基礎設計難度較大。針對這些關鍵問題，以某實際項目為依托，提出了一些應對方法。其中，針對坡地建筑扭轉位移比嚴重超限問題提出了加長短柱、增大長柱截面剛度、設置連系梁、設置防震縫、短柱設計為搖擺柱等方法，并對其進行了詳細的對比分析，采用Perform-3D進行罕遇地震下的靜力彈塑性分析。分析結果表明，扭轉位移比越大，地震剪力越容易集中在角部短柱上，短柱越容易破壞，結構整體抗震性能越差，因此改善扭轉位移比是必要的。
［關鍵詞］坡地建筑；不等高嵌固；扭轉位移比；基礎設計
中圖分類號：TU398-7 文獻標識碼：A文章編號：1002-848X(2021)13-0059-06
Key problems and countermeasures in design for building structure on slope
XUE Xiaojuan, JIANG Yi, LIN Lebin, YI Weiwen
(South China University of Technology Architectural Design Research Institute Co., Ltd., Guangzhou 510641， China)
Abstract: Because the sloping building is built on the mountain, its wind load value and seismic action have a certain amplification effect than that of a flat building. At the same time, due to the unequal height fixed of the bottom of the sloping building, its structural design indicators are often difficult to meet the design requirements of the current specifications. In addition, the engineering geology of the hillside area is complex, the terrain is undulating, the depth of the supporting layer is different, and the foundation design is difficult. In response to these key issues, based on an actual project, some countermeasures were proposed. Among them, in view of the serious over-limit problem of the torsional displacement ratio of sloping building, methods such as lengthening the short column, increasing the section stiffness of the long column, setting the connecting beam, setting the seismic joint, and designing the short column as a swing column, etc. were proposed. And a detailed comparative analysis was carried out, Perform-3D was used to carry out static elasto-plastic analysis under rare earthquakes. The analysis results show that the larger the torsional displacement ratio, the easier the seismic shear force is concentrated on the corner short columns, the easier the short columns are to break, and the worse the overall seismic performance of the structure. Therefore, it is necessary to improve the torsional displacement ratio.
Keywords:sloping building； unequal height fixed； torsional displacement ratio； foundation design
作者簡介：薛曉娟，碩士，工程師，一級注冊結構工程師，注冊土木工程師（巖土）, Email：510183887@qq.com。
