不经计算,通过直接判定得知图示桁架中零杆的数目为:()https://assets.asklib.com/psource/2016071915432440977.jpg
图示桁架结构杆①的轴力为:()https://assets.asklib.com/psource/2016071810493446922.jpg
图示桁架中杆件内力等于零,即所谓“零杆”为()。https://assets.asklib.com/images/image2/2017032912010929443.jpg
图示桁架结构杆①的轴力为:()https://assets.asklib.com/psource/201607181048562559.jpg
图示桁架中的零杆数为()。https://assets.asklib.com/images/image2/2017040815313462928.png
不经计算,通过直接判定得知图示桁架中零杆的数目为:()https://assets.asklib.com/psource/2015102711590765182.jpg
不经计算,通过直接判定得知图4-29所示桁架中零杆的数目为()。https://assets.asklib.com/psource/2015103014142948197.jpg
图示桁架a杆的内力是()。https://assets.asklib.com/psource/2015110415284612586.png
不经计算,通过直接判定得知图示桁架中零杆的数目为:()https://assets.asklib.com/psource/2015110409034683288.png
图示桁架中,杆①的轴力为()https://assets.asklib.com/psource/2015102909201438369.jpg
桁架结构形式与载荷 https://assets.asklib.com/psource/2015110210031685371.png 均已知。结构中零杆数为()。 https://assets.asklib.com/psource/2015110210033556500.png
不经计算,可直接判断出图示桁架结构的零杆数目为()。https://assets.asklib.com/psource/201511021032576719.png
图示桁架结构杆①的轴力为:()https://assets.asklib.com/psource/2016071810483259625.jpg
不经计算,可直接判断出图示桁架结构的零杆数目为()。https://assets.asklib.com/psource/201607191659206943.jpg
不经计算,通过直接判定得知图示桁架中零杆的数目为:()https://assets.asklib.com/psource/2015102711584262476.jpg
图示桁架结构杆①的轴力为:()https://assets.asklib.com/psource/2015102815061033482.jpg
桁架结构形式与载荷 https://assets.asklib.com/psource/2016071916450984684.jpg 均已知。结构中零杆数为()。 https://assets.asklib.com/psource/201607191645184531.jpg
桁架中把内力为零的杆件称为零杆。图示桁架中,零杆为 。c5e392f55396277096153584af6f370c.png
图示桁架,各杆EA为常数,除支座链杆外,零杆数为:138ec65c5d81401594edfb698b3183c2.png
图示桁架,零杆的数目为:f8b98c82c65eea3b534fdb425b20c6c4.png
试判断图示平面静定桁架零杆,将受力为零的杆在杆上画○便可。
图示桁架,零杆的数目为:()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/18/610/20211118110717736.png' />
图示桁架有几根零杆()<img src='https://img2.soutiyun.com//1/2021-05-13/989774419893367.png' />
图示桁架中零杆的数目为(不包括支座链杆)()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/18/1306/20211118110617563.png' />