高層剪力墻底部加強部位最小厚度取值的商榷
張 偉1 梁興文2
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(1 香港華藝設(shè)計顧問(深圳)有限公司 深圳 518031；2 西安建筑科技大學(xué) 710055)［提要］ 高層剪力墻結(jié)構(gòu)底部加強部位墻厚若要滿足《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》(JGJ3—2002)第7.2.2.1～3款要求，可能會較大，不經(jīng)濟。按附錄D墻體穩(wěn)定計算方法，雖然為規(guī)程所允許，但該法在實際設(shè)計中運用不方便。引入滿足穩(wěn)定要求的等效軸壓比限值[neq]，以此來判斷墻體是否滿足穩(wěn)定性要求?；谠摰刃лS壓比限值的概念，分析三種常見截面墻體厚度在不滿足最小厚度規(guī)定時的可行范圍。建議對不滿足最小墻厚規(guī)定的剪力墻結(jié)構(gòu)，可以采用該等效軸壓比和規(guī)程第7.2.14條給出的軸壓比限值進行雙重控制來確定其厚度取值。［關(guān)鍵詞］ 剪力墻結(jié)構(gòu) 穩(wěn)定性能 等效軸壓比限值 計算長度系數(shù)Discussion of Minimum Wall Thickness in Bottom Strengthen Position for Tall Shear Wall Structure/Zhang Wei1，Liang Xingwen2(1 Hong Kong Huayi Design & Consultant Co. Ltd. , Shenzhen 518031，China;2 Xi" an University of Architecture and Technology, Xi" an 710055,China)Abstract:It is uneconomical that the wall thickness of in bottom strengthened position for tall shear wall structure is satisfied with Technical Specification for Concrete Structures of Tall Building item 7.2.21～3. Although the wall stability calculation in appendix D by specification is allowable, the method is discommodious in practice. Therefore, inducing the equivalent axial load ratio ［neq］which is satisfied with stability to estimate whether wall meets it. Based on the concept of the equivalent axial load ratio,the feasibility range in which three types of wall thickness aren"t matched with minimum thickness respectively is analyzed.It is advised that the shear wall structure which is dissatisfied with the value of minimum wall thickness can be confirmed though the method that control［neq］and limiting value for axial load ratio［n］according to item 7.2.14 of the specification.Keywords:shear wall structure； stability； equivalent axial load ratio； effective length factor
