木结构验算

木构件截面验算1、主梁验算1.跨度L=3.36米，截面宽*高=38235mm开间：0.41米2.截面参数：I=1/12*38*235^3=mm4W=1/6*38*235^2=mm3S=38*117.5*58.75=mm3E=9000N/m23.荷载取值：楼面活荷载取2KN/m2楼面恒荷载取2.5KN/m2面荷载为A=1.4*2+1.2*2.5=5.8KN/m2格栅以415mm间距搁置在主梁上，近似按线荷载计算，q=5.8*0.406=KN/mM=1/8*2.3548*3.36^2=KN.mV=1/2*2.3548*3.36=KN4.抗拉强度验算：fm=3.32/0.349758333333333=N/mm2采用TC15树种，fm=N/mm2满足5.挠度验算W=5/384*2.3548*3360^4/(9000*41096604.1666667)=10.6mmW=1/250*3360=mm满足6.受剪验算VS/(Ib)=3.96*10^3*262318.75/(41096604.1666667*38)=0.67N/mm2采用TC13树种,按B级，fv=N/mm2满足9.491513.441.441096604349758.3262318.82.35483.323.96