【正文】
第 1 至第 4 層 柱集中力 ( 1) A、 D 柱 AF 、 DF 計算 主梁自重: kNm ? = 外墻自重:外墻寬: 3 .9 m 0 .5 m 3 .4 m??;墻高: 3. 6m 0. 6m 3m??; 窗面積為 21. 8m 2. 1m =3. 78 m? ; 11 外墻凈面積為: 223. 4m 3 m 3. 78 m 6. 42 m? ? ? 故外墻自重為: kN / m m kN?? 邊柱自重: 板傳荷載: 2 14 . 0 3 2 k N m 3 . 9 m 1 . 9 5 m2? ? ?= 2 5 .8 9 k N 2 2 .5 k N 1 6 .4 3 k N 1 4 .0 8 k N 7 6 .9 0 k NADFF ? ? ? ? ? ?故 ( 2) B、 C 柱 BF 、 CF 計算 主梁自重: ? = 內墻自重: ? =27kN 板傳荷載: 2 14 .3 2 k N /m 3 .9 m 1 .9 5 m2? ? ? 2 14 .3 2 k N /m (1 .9 m 3 .9 m ) 12? ? ? ? ?? 14. 08k N 27 kN 22. 5kN 28. 95k N 92. 53 kNBCFF ? ? ? ? ? ?故 。 ( 3) CDq 的計算: CDq = ABq = 圖 板荷載傳遞圖 8 2 2 . 8 7 K N / m 1 0 . 2 8 K N / m 2 2 . 8 7 K N / m 圖 框架梁均布恒荷載作用示意圖 第 5 層(屋面)框架作用活荷載的計算 AB、 CD 跨屋面活荷載為 2kNm ,傳遞給梁 AB 的荷載為梯形荷載,等效轉化為: 2 3 2 3 21 . 9 5 1 . 9 51 2 [ 1 2 ] 2 . 0 k N m 1 . 9 5 2 6 . 7 5 k N m77a a P? ? ? ? ? ? ? ?( ) ( ) ( ) 屋面?zhèn)鬟f給梁 BC 的荷載為三角形,等效轉化為均布荷載: 58 q = 2kNm ? 1m ? 58 ? 2= 6 . 7 5 K N / m 2 . 5 K N / m 6 . 7 5 K N / m 圖 框架梁均布活荷載作用示意圖 恒荷載作用下第 5 層柱頂層集中力 ( 1) A、 D 柱 AF 、 DF 計算 女兒墻: 2kNm ? ? = 主梁自重: ? = 板傳荷載: 2 15 . 6 2 k N m 3 . 9 m 1 . 9 5 m2? ? ?= 故 AF = DF = + + = ( 2) B、 C 柱 BF 、 CF 計算 主梁自重: kN m m 5kN?? 9 板 傳荷載: 2 115 . 6 2 k N m 3 . 9 m 1 . 9 5 m m 3 . 9 m 1 3 7 . 6 7 k N22??? ? ? ? ? ? ? ????? ( ) 故 BF = CF = + = 。 豎向荷載作用下荷載計算 第 5 層(屋面)框架作用恒荷載的計算 7 ( 1) qAB 的計算: AB 跨板的屋面荷載為 2kNm ,傳遞給梁 AB 的荷載為梯形荷載,等效轉化為均布荷載2 3 2 3 21 . 9 5 1 . 9 51 2 [ 1 2 ] 5 . 6 2 k N m 1 . 9 5 9 . 4 8 k N m77a a P? ? ? ? ? ? ?( ) ( ) ( ); 故 AB 跨板兩側傳給梁 AB 的荷載為 ? 2= ; 梁 AB 的自重為 kNm ;故 ABq = + = 。其中, cf :混凝土軸心抗壓設計值, C25 為 kN/m2; n? :框架柱軸壓比限值,對一、二、三級抗震等級,分別取 、 、 ; ? :考慮地震作用組合后柱的軸向壓力增大系數(shù),邊柱取 ,不等跨內柱取 ,等跨內柱取 ; Eg :折算在單位建筑面積上的重力荷載代表值,框架結構可近似取 10— 12 2kN/m (取 10 2kN/m );n:柱截面以上的樓層的層數(shù)( 5 層); F:按簡支狀態(tài)計算的柱的負載面積。 樓面結構:采用現(xiàn)澆混凝土肋型樓蓋,板厚 110mm ,局部 100mm 。 門窗做法:門為木門,窗為塑鋼窗。 樓面做法: 110 厚鋼筋混凝土樓板、 20 厚水泥砂漿抹底、 30 厚水泥豆石面層。 ( 2)主體結構 采用現(xiàn)澆混凝土框架結構,肋梁樓蓋。 關鍵詞: 框架結構 ;鋼筋混凝土; 荷載計算 ; 內力計算 ;結構設計 Frame Structure Design of Student Dormitory Building 6 of a Middle School in Ningbo Pei TING SHEN, Major in Civil Engineering, College of Urban Construction Abstract: This project adopts frame structure format with a fivestorey main body. The earthquake intensity of the site is 6 degrees, the type of the site is class II and the basic wind pressure The castinplace reinforced concrete structure is used in the floor and roof. The design implements utility, security, economy, beauty, the design principles. In the design process, the various factors are analyzed based on corresponding code. The 5axis of the horizontal framework is designed. After determining the distribution framework, the representative value of the load acting on the structure is calculated firstly. Then, the internal forces of the structure (bending moment, shear and axial force) under the action of horizontal loading are derived. Then the internal force subjected to the vertical load (constant load and live load) are calculated. The worst bination of the internal forces is found and the most safety results are used to the reinforcement. Then, based on the load transformed from the upper structure, the shallow foundation is designed and calculated. Finally, the PKPM and AUTOCAD soft are used to draw the structural working drawing. Key words: Frame Structure; Concrete structure; Load Calculation; Internal force calculation;Structural design 目 錄 1.設計資料 .................................................................................................................... 1 1. 1 初步設計資料 ...................................................................................................... 1 1. 2 結構選型 ............................................................................................................. 1 2.截面尺寸選擇及計算簡圖 ........................................................................................... 2 2. 1 梁截面尺寸估算 .................................................................................................. 2 2. 2 板截面尺寸估算 .................................................................................................. 2 2. 3 柱截面尺寸估算 .................................................................................................. 2 2. 4 計算簡圖確定 ...................................................................................................... 3 3.荷載計算 .................................................................................................................... 5 3. 1 屋面及樓面恒載標準值計算 ................................................................................. 5 3. 2 梁、墻重力荷載計算 ........................................................................................... 5 3. 3 活荷載標準值計算 ............................................................................................... 6 3. 4 豎向荷載作用下荷載計算 .................................................................................... 6 3. 5 風荷載計算 ........................................................................................................13 4.荷載作用下框架內力分析 ..........................................................................................15 4. 1 風荷載作用下的內力分析計算 ............................................................................15 4. 2 豎向荷載作用下框架內力分析 ............................................................................26 5.內力組合 ...................................................................................................................45 6.框架梁、柱截面配筋計算 ..........................................................................................49 6. 1橫梁正截面受彎承載力計算 .................................................................................49 6. 2橫梁斜截面受剪承載力計算 ..........................................................................