理正結(jié)構(gòu)計(jì)算書梁(板)截面設(shè)計(jì)與驗(yàn)算(LJM-5)項(xiàng)目名稱構(gòu)件編號日期設(shè)計(jì)校對審核執(zhí)行規(guī)范:《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》(GB50010-2010),本文簡稱《混凝土規(guī)范》《建筑抗震設(shè)計(jì)規(guī)范》(GB50011-2010),本文簡稱《抗震規(guī)范》鋼筋：d-HPB300;D-HRB335;E-HRB400;F-RRB400;G-HRB500;P-HRBF335;Q-HRBF400;R-HRBF500-----------------------------------------------------------------------梁截面設(shè)計(jì):1已知條件及計(jì)算要求：(1)已知條件：T形梁b=1000mm，h=3000mm，bf上=2000mm，hf上=1000mm，dh上=0mm。砼C30，fc=14.30N/mm2，ft=1.43N/mm2，縱筋HRB400，fy=360N/mm2，fy'=360N/mm2，箍筋HPB300，fy=270N/mm2。彎矩設(shè)計(jì)值M=10625.00kN.m，剪力設(shè)計(jì)值V=625.00kN，扭矩設(shè)計(jì)值T=0.00kN.m。(2)計(jì)算要求：1.正截面受彎承載力計(jì)算2.斜截面受剪承載力計(jì)算3.裂縫寬度計(jì)算。2抗彎計(jì)算:按工字形截面計(jì)算，無翼緣側(cè)翼緣高度取0，翼緣寬度取腹板寬(1)求相對界限受壓區(qū)高度ξb:εcu=0.0033-(fcu,k-50)×10-5=0.0033-(30-50)×10-5=0.00350εcu>0.0033，取εcu=0.00330bf0(2)計(jì)算Mbc:bcc1c2(3)計(jì)算判斷受壓鋼筋計(jì)算判斷:Mbc=82314.68kN.m≥10625.00kN.m,受壓區(qū)鋼筋按構(gòu)造計(jì)算(4)計(jì)算受壓鋼筋A(yù)s'以及受拉鋼筋A(yù)s受壓鋼筋A(yù)s':As'=ρminbh=0.20%×1000×3000=6000.000mm2Ms1=As'fy'(h0-as')=6000×360.00×(2940-60)=6220.801kN.ms3yy受拉鋼筋:As=As1+As3=4199+6000=10199mm2(5)配筋率驗(yàn)算受拉鋼筋配筋率ρ=As/bh=10199/1000×3000=0.34%>ρsmin=max{0.0020,0.45ft/fy=0.45×1.43/360=0.0018}=0.00203抗剪計(jì)算:(1)截面驗(yàn)算，按《混凝土規(guī)范》公式(6.3.1)V=0.25βcfcbh0=0.25×1.000×14.30×1000×2940=10510500N=10510.50kN>V=625kN截面尺寸滿足要求。(2)配筋計(jì)算，按混凝土規(guī)范公式(6.3.4-2)V<αcvftbh0+fyv(Asv/s)h0Asv/s=(V-αcvftbh0)/(fyvh0)=(625.00×103-0.70×1.43×1000×2940)/(270×2940)=-2.92006mm2/mm=-2920.06mm2/m配箍率ρsv=Asv/s/b=-2.92006/1000=-0.29%<ρsvmin=0.13%不滿足最小配箍率抗剪箍筋按構(gòu)造配筋:Asv/s=ρsvmin×b=0.13%×1000=1.27111mm2/mm=1271.11mm2/m4配置鋼筋：(1)上部縱筋：計(jì)算As=6000mm2，實(shí)配10E28(6158mm2ρ=0.21%)，配筋滿足(2)腰筋：計(jì)算構(gòu)造As=b*hw*0.2%=3880mm2，實(shí)配30d14(4618mm2ρ=0.15%)，配筋滿足(3)下部縱筋：計(jì)算As=10199mm2，實(shí)配13E32(10455mm2ρ=0.35%)，配筋滿足(4)箍筋：計(jì)算Av/s=1271mm2/m，實(shí)配d8@150四肢(1340mm2/mρsv=0.13%)，配筋滿足5裂縫計(jì)算:(1)截面有效高度:=-=-=h0has3000602940mm7.1.2-4:tete:構(gòu)件受力特征系數(shù)αcr=1.9:(5)最大裂縫寬度計(jì)算,根據(jù)《混凝土規(guī)范》式7.1.2-1:maxlim-----------------------------------------------------------------------【理正結(jié)構(gòu)設(shè)計(jì)工具箱軟件7.0PB1_SP1