我
(逆时针)，则AB杆B端弯矩(下侧受拉为正)MBA=_______。
- A.<img src="//img1.yqda.net/question-name/57/f23ad966c29beab2706c6ab282c328.png" width="119" height="101"/>
- B.<img src="//img1.yqda.net/question-name/99/ac1be9496a6b19e582f3981ab50220.png" width="117" height="100"/>
- C.<img src="//img1.yqda.net/question-name/13/f3f9bdc4dd6a7eaf9e6a680fdbd7df.png" width="117" height="97"/>
- D.<img src="//img1.yqda.net/question-name/dd/607e21b3398fb1ac155caad734bc07.png" width="128" height="98"/>
- 12
-
阻尼比ξ为
- A.阻尼系数与临界阻尼系数之比
- B.阻尼力与惯性力之比
- C.两个相临振幅之比
- D.阻尼力与质点速度之比
- A.1kN·m
- B.0.5kN·m
- C.-1kN·m
- D.-2kN·m
- A.A、B两截面的弯矩不变
- B.A、B两截面的弯矩减小
- C.A截面弯矩增大，B截面弯矩减小
- D.A截面弯矩减小，B截面弯矩增大
- A.<img src="//img1.yqda.net/question-name/7d/301813a032da9cb4db61ab345bed51.png" width="33" height="39"/>
- B.<img src="//img1.yqda.net/question-name/0a/97c6e0d6937342ad5749b22dfeea55.png" width="34" height="38"/>
- C.<img src="//img1.yqda.net/question-name/58/5cfd96af14aadfcdc52a507a388415.png" width="29" height="36"/>
- D.<img src="//img1.yqda.net/question-name/ce/8ba2d3a07f4d202d134ecab957198d.png" width="36" height="33"/>
- A.2△
- B.△
- C.-△
- D.-2△
- A.<img src="//img1.yqda.net/question-name/6c/be923c6da32364296acb1da6324523.png" width="193" height="68"/>
- B.<img src="//img1.yqda.net/question-name/7f/afb6cebfae9dd02d8f722f2f4e8840.png" width="194" height="59"/>
- C.<img src="//img1.yqda.net/question-name/19/fb878acfde3224852f5dcdae9491a4.png" width="202" height="62"/>
- D.<img src="//img1.yqda.net/question-name/c6/cf6de3d0d55fb349018853e8308b2e.png" width="187" height="64"/>
- A.竖向反力增加
- B.竖向反力减少
- C.水平反力增加
- D.水平反力减少
- A.10KN
- B.6.67KN
- C.-6.67KN
- D.-10KN
- 20
-
图示多跨静定梁
- A.AB、BC段无弯矩
- B.BC、CD段无弯矩
- C.AB、CD段无弯矩
- D.AB、BC和CD段无弯矩
