图示梁的受载情况对于中央截面C为反对称。FSC和MC分别表示中央截面C的剪力和弯矩,则下列结论中哪个是正确的?
等截面刚架,矩形截面高h=l/10,材料的线膨胀系数为α,在图示温度变化下,C点的竖向位移△<sub>Cy</sub>之值为______。<img src='https://img2.soutiyun.com/ask/5328001-5331000/52d66b44a19241171173c05c8c9fb77e.jpg' />
图示垂直置于水中的矩形平板闸门,宽度b=1m,闸门高h=3m,闸门两侧水深分别为H。=5m,H2=4m,闸门所受总压力为: A.29.4kN B.132.3kN C.58.8kN D.73.5kN<img src='https://img2.soutiyun.com/ask/uploadfile/2682001-2685000/707df69c41816be519c437a342d4f522.gif' />
图示结构中A截面的弯矩()。<img src='https://img2.soutiyun.com/shangxueba/ask/2013001-2016000/2014856/ct_jgzjgyxm_jgzjgyxchoose_00401(20093).jpg' />
图示结构K截面弯矩MK为()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/18/666/20211118111124101.png' />
图示细长压杆,为球形铰支,弹性模量E=200GPa,试用欧拉公式计算其临界载荷。圆形截面,d=25mm,ι=1.0m.<img src='https://img2.soutiyun.com/ask/uploadfile/11400001-11403000/da4f5de4f079aee93c9fe640201c09be.jpg' />
图示结构,支座A的水平反力H的影响线在与C点相对应的竖标为()<img src='https://img2.soutiyun.com/shangxueba/ask/17850001-17853000/17852970/2015102909240524356.jpg' />
图示为结构在荷载作用下的MP图,各杆EI=常数,支座B截面处的转角为:<img src='https://img2.soutiyun.com/shangxueba/ask/61308001-61311000/61310357/3c6949b20cdf4ea8629d42622cfe35f4.png' />
图示结构,各杆EI=常数,截面C、D两处的弯矩值Mc、Md(对杆端顺时针转为正)分别为(单位:kN·m):()
两端铰接、单轴对称的T形截面压弯构件,弯矩作用在截面对称轴平面并使翼缘受压,可用下列公式( )进行计算。<img src='https://img2.soutiyun.com/ask/uploadfile/6504001-6507000/015a2b7d71c54be8dfd73e29e902f47e.png' />
图示结构由三个横截面积为A的铆钉连接两块钢板而成,图中尺寸单位均为mm,则铆钉的最大剪应力为()<img src='https://img2.soutiyun.com/shangxueba/ask/19029001-19032000/19030706/2014081810394576178.png' />
图示结构用力矩分配法计算时杆CB在结点C的分配系数为2/3。EI=常数。()<img src='https://img2.soutiyun.com/ask/2019-08-21/935234182165948.png' />此题为判断题(对,错)。
图示虹吸管,出口为大气,已知h<sub>1</sub>=1m,h<sub>2</sub>=2m,不计水头损失,α=1.0,则C-C断面压强p<sub>C</sub>为()。<img src='https://img2.soutiyun.com/shangxueba/ask/18990001-18993000/18990169/2016071909052424830.jpg' />
图示结构,截面A、B间的相对转角为:<img src='https://img2.soutiyun.com/ask/uploadfile/3987001-3990000/cd3612aca8dcef6153ea30086c40dedc.png' />
图示结构跨中D截面右侧的弯矩为( )。
图示为悬臂梁截面C剪力影响线图的几种结果,其中正确的应是()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/18/655/2021111811102458.png' />
图示结构,BA杆件B端弯矩MBA(左侧受拉为正)为()。<img src='https://img2.soutiyun.com/1/2021-04-07/986666229837022.jpg' />
图示结构截面B的剪力Q<sub>BA</sub>等于()<img src='https://img2.soutiyun.com/shangxueba/ask/17730001-17733000/17730128/2015102816015575622.jpg' />
图示梁中C截面的弯矩是()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/18/714/20211118110911703.png' />
图示结构D截面剪力QD影响线在E点的坚标应是()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/18/1101/20211118110943848.png' />
图示结构截面K的弯矩值Mk为:()
已知材料屈服极限=300MPa,结构截面形状如图所示,则极限弯矩Mu=()。<img src='https://img2.soutiyun.com/1/2021-04-07/986665904085718.jpg' />
图示结构杆端弯矩MBA(设左侧受拉为正)为:()。<img src='https://img.soutiyun.com/ask/zq/20210712/994934448215668.png' />
对图示的AB段,采用叠加法作弯矩图是()。<img src='https://img2.soutiyun.com//1/2021-05-31/991319579783955.png' />