【正文】
上部配214的二級鋼筋。從上到下第一個臺階變階處:,滿足要求。頂層邊節(jié)點:設(shè)計剪力:取4肢10100,=KN,滿足要求。柱的斜截面抗震承載力V=其中:——框架的計算剪跨比,=Hn/2h0。五、內(nèi)力組合:根據(jù)內(nèi)力計算結(jié)果,即可進行框架各梁柱各控制截面上的內(nèi)力組合,其中梁的控制截面為梁端柱邊及跨中。MMc1zl ==M中柱:Mc2zu==MMc3bl==M對四層:邊柱:Mc4bu==V5=Pw5=V4= Pw4+V5=V3= Pw3+V4=V2= Pw2+V3=V1= Pw2+V2=各層柱子的D值為:D5中=D4中=D3中=D2中=56550KN/MD5邊=D4邊=D3邊=D2邊=32550KN/MD1中=28628KN/M D1邊=21083KN/M所以:V5邊==V5中==V4邊==V4中==V3邊==V3中==V2邊==V2中==V1邊==V1中==各層柱子的反彎點高度為:yh=(y0+y1+y2+y3)h對頂層邊柱:k=,查表得:y0=,y1=y2=y3=0所以:yh=對頂層中柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=四層邊柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=四層中柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=三層邊柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=三層中柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=二層邊柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=二層中柱:k=,查表得:y0=,y1=y2=y3=0yh=(y0+y1+y2+y3)h=首層邊柱:k=,查表得:y0=,y1=y2= y3=0yh=(y0+y1+y2+y3)h=首層中柱:k=,查表得:y0=,y1=y2=y3=0 yh=(y0+y1+y2+y3)h=求出反彎點高度和各層柱子剪力后,即可求出各柱端彎矩。M中柱:Mc1zu==MMc2bl==M對三層:邊柱:Mc3bu==MMbr=Mc5zu== KNM跨中彎矩為:頂層:其他層:(3) 彎矩調(diào)幅并考慮活荷載的不利布置,調(diào)整后的彎矩圖如圖42所示:(4) 剪力計算:同恒載作用下,按簡支跨計算:頂層中跨:V1=V2== KN一~四層中跨:V1=V2== KN頂層邊跨:V1+=0V1= KN同理:V2=四層邊跨:V1+=0V1= KN同理:V2=三層邊跨:V1+=0V1=同理:V2=二層邊跨:V1+=0V1= KN同理:V2=底層邊跨:V1+=0V1= KN同理:V2=(5) 軸力計算:頂層:邊柱軸力:N5D=P5D+V1=中柱軸力:N5C=P5C+V1+V2= KN四層:四層邊柱:N4D=PD+ N5D +V1= KN四層中柱:N4C=PC+V1+ N5C +V2= KN三層:三層邊柱:N3D=PD+ N4D +V1=三層中柱:N3C=PC+V1+ N4C +V2= KN二層:二層邊柱:N2D=PD+ N3D +V1=二層中柱:N2C=PC+V1+ N3C +V2= KN底層:底層邊柱:N1D=PD+ N2D +V1=底層中柱:N1C=PC+V1+ N2C +V2= KN(6) 活載作用下的內(nèi)力簡圖為:剪力(圖43)、軸力(圖44):地震力作用下的內(nèi)力計算采用D值法,把各層層間剪力Vj分配給該層的各個柱子。l中2==l邊2==(4) 剪力計算:按簡支跨計算: 對頂層邊跨: V1----+=0 V1= 同理:V2=對頂層中間跨:V1=0 V1=V2= 對四層邊跨:V1----+=0 V1= 同理:V2= KN對四層中間跨:V=0 V1=V2= 對三層邊跨:V1----+=0 V1= 同理:V2=對三層中間跨:VM (五層邊跨) == KNg邊=gAB1+gAB2=+= KN/mg中=gBC1+gBC2=+= KN/m各桿的固端彎矩為:MAB= MBA=g邊: g5邊=g5AB1+g5AB2=+=g5中=g5BC1+g5BC2=+= KN/m圖示結(jié)構(gòu)內(nèi)力可用彎矩分配法計算,并可利用結(jié)構(gòu)對稱性取二分之一結(jié)構(gòu)計算,各桿的固端彎矩為:M5AB= M5BA =g5邊M(2) 本設(shè)計僅考慮水平地震作用即可,并采用基底剪力法計算水平地震作用力。ωo因結(jié)構(gòu)高度H=30m,可取βz=;對于矩形平面μs=;μz可查荷載規(guī)范得到,當(dāng)查得得μz ,取μz=。/l=1046006003/(124700)=1010N地震作用下的彈性側(cè)移將更小,一定符合要求。(8) 地質(zhì)條件: 由上至下:人工添土:厚度為1m粉質(zhì)粘土:厚度為7m,地基承載力特征值為500KPa中風(fēng)化基巖:建筑場地類別為Ⅱ類;無地下水及不良地質(zhì)現(xiàn)象。關(guān)鍵詞: 框架,結(jié)構(gòu)設(shè)計,抗震設(shè)計 II畢業(yè)設(shè)計計算書ABSTRACT The purpose of the design is to do the antiseismic design in the longitudinal frames of axis5. When the directions of the frames is determined, firstly the weight of each floor is calculated .Then the vibrate cycle is calculated by utilizing the peakdisplacement method, then making the amount of the horizontal seismic force can be got by way of the bottomshear force method. The seismic force can be assigned according to the shearing stiffness of the frames of the different axis. Then the internal force (bending moment, shearing force and axial force ) in the structure under the horizontal loads can be easily calculated. After the determination of the internal force under the dead and live loads, the bination of internal force can be made by using the Excel software, whose purpose is to find one or several sets of the most adverse internal force of the wall limbs and the coterminous girders, which will be the basis of protracting the reinforcing drawings of the ponents. The design of the stairs is also be approached by calculating the internal force and reinforcing such ponents as land