图示结构杆①的轴力大小为:()https://assets.asklib.com/psource/2015102815082355183.jpg
图示结构杆①的轴力为()https://assets.asklib.com/psource/2014081812541685802.png
图示桁架结构杆①的轴力为:()https://assets.asklib.com/psource/2016071810493446922.jpg
图示桁架结构杆①的轴力大小为:()https://assets.asklib.com/psource/2015102815063311179.jpg
图示桁架结构杆①的轴力为:()https://assets.asklib.com/psource/201607181048562559.jpg
图示结构中,杆CD的轴力NCD是:()https://assets.asklib.com/psource/2016071809203048976.jpg
图示结构杆①的轴力为:()https://assets.asklib.com/psource/201607181052288269.jpg
图示桁架结构杆①的轴力大小为:()https://assets.asklib.com/psource/2015102815071084615.jpg
图示结构杆①的轴力的大小为:()https://assets.asklib.com/psource/2015102815080132932.jpg
图示结构杆①的轴力为:()https://assets.asklib.com/psource/2016071810525862368.jpg
图示结构杆①的轴力为()https://assets.asklib.com/psource/2015102817200381486.jpg
图示结构杆①的轴力为:()https://assets.asklib.com/psource/2015110415484158549.png
图示结构中,a杆的轴力N A 为:() https://assets.asklib.com/psource/2016071810532653932.jpg
图示结构中,杆CD的轴力NCD是:()https://assets.asklib.com/psource/201511041604096389.png
图示结构杆①的轴力为:()https://assets.asklib.com/psource/2016071810515553163.jpg
图示结构杆①的轴力大小为:()https://assets.asklib.com/psource/2015102815084211091.jpg
图示结构中,a杆的轴力N a 大小为:() https://assets.asklib.com/psource/2015102815090985847.jpg
图示桁架中a杆的轴力N a 大小为:() https://assets.asklib.com/psource/2015102815100448612.jpg
图示结构杆①的轴力为:()https://assets.asklib.com/psource/2015110415473943857.png
图示结构杆①的轴力为:()https://assets.asklib.com/psource/2015110415480748269.png
已知图示结构中,杆AB 和CD的弹性模量分别为E1、E2,截面惯性矩分别为I1、I2。若已知杆BC轴力为零,则必有( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/42f1f6d850e84a5d80f59a580d9598d7.png
下图桁架中,杆1和杆2的横截面面积均为A,许用应力均为[σ]。设N1、N2分别表示杆1和杆2的轴力,则在下列结论中,( ) 是错误的。ccfa8900f22c643ba9bf893cd0c697c1.gif
图示结构杆①的轴力为()。 A.0B.PC.-PD.1.414P
图示刚架中,杆CD的轴力FNCD=_____kN。