图(a)所示结构EI=常数,取图(b)为力法基本体系,则δ<sub>11</sub>X<sub>1</sub>+△<sub>1c</sub>和△<sub>1c</sub>分别等于______。<img src='https://img2.soutiyun.com/shangxueba/ask/55302001-55305000/55304853/23d5564b4a1ddd32474fcf5e7ca15782.jpg' />
A.△,<img src='https://img2.soutiyun.com/latex/latex.action' />
B.-△,<img src='https://img2.soutiyun.com/latex/latex.action' />
C.△,<img src='https://img2.soutiyun.com/latex/latex.action' />
D.-△,<img src='https://img2.soutiyun.com/latex/latex.action' />
时间:2023-08-18 09:56:20
相似题目
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图b)是图a)结构的力法基本体系,则力法方程中的系数和自由项为:()
https://assets.asklib.com/psource/2016071811233350028.jpg
https://assets.asklib.com/psource/2016071811233140366.jpg
A . A
B . B
C . C
D . D
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如图a)所示结构,EI=常数,取图b)为力法基本体系,则下述结果中错误的是:()https://assets.asklib.com/psource/2016071809294085842.jpg
A . δ
=0
B . δ
=0
C . Δ
=0
D . δ
=0
-
图示结构,若取梁B截面弯矩为力法的基本未知量Xl,当I2增大时,则X1绝对值的变化状况是:()https://assets.asklib.com/psource/2015110416044397530.png
A . 增大
B . 减小
C . 不变
D . 增大或减小,取决于I2/I1比值
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图a)所示桁架,EA=常数,取图b)为力法基本体系,则力法方程系数间的关系为()。https://assets.asklib.com/psource/2015110415342398984.jpg
A . δ22<δ1l,δ12>0
B . δ22<δ1l,δ12<0
C . δ22>δ1l,δ12>0
D . δ22>δ1l,δ12<0
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如图a)所示结构,若将链杆撤去,取图b)为力法基本体系,则力法方程及δ
11
分别为:()
https://assets.asklib.com/psource/2016071809364267004.jpg
https://assets.asklib.com/psource/2016071809364934393.jpg
A . A
B . B
C . C
D . D
-
如图a)所示桁架各杆EA均为有限值。当撤去杆.AB采用图b)为力法基本体系时,相应力法方程的右端项应()https://assets.asklib.com/psource/2015102816043472933.jpg
A . >0
B . <0
C . =0
D . 需视P
、P
的关系而定
-
用位移法计算图a所示刚架,图b为基本结构,已知各杆EI=常数,则系数r11为()。https://assets.asklib.com/psource/2015110415324794561.png
A . 9EI/L
B . 10EI/L
C . 11EI/L
D . 12EI/L
-
图a)所示桁架,EA=常数,取图b)为力法基本体系,则力法方程系数间的关系为:()https://assets.asklib.com/psource/2016071809254342901.jpg
A . δ
=δ
,δ
>0
B . δ
≠δ
,δ
>0
C . δ
≠δ
,δ
<0
D . δ
=δ
,δ
<0
-
用力矩分配法计算图(a) 所示连续梁,作M图,EI=常数。固端弯矩表见图(b)。https://assets.asklib.com/images/image2/2018072014044051840.jpg
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图a)结构,取图b)为力法基本体系,EI=常数,△
1p
为:()
https://assets.asklib.com/psource/2015102815363883567.jpg
A . ql
/3EI
B . ql
/4EI
C . 7ql
/24EI
D . 11ql
/24EI
-
图a)结构,取图b)为力法基本体系,则力法方程中的△
2c
为:()
https://assets.asklib.com/psource/2015102815393695073.jpg
https://assets.asklib.com/psource/2015102815393763594.jpg
A . a+6
B . a+lθ
C . -a
D . a
-
如图a)所示结构,EI=常数,取图b)为力法基本体系,则下述结果中错误的是:()https://assets.asklib.com/psource/2015110416061681531.png
A . δ23=0
B . δ31=0
C . Δ2P=0
D . δ12=0
-
如图a)所示结构,取图b)为力法基本体系,则力法方程中的
https://assets.asklib.com/psource/2016071809373042784.jpg
为:()
https://assets.asklib.com/psource/2016071809374546630.jpg
A . a+b
B . a+lθ
C . -a
D . a
-
忽略轴向变形时,图15-4-23所示结构中,(EI=常数)A端的弯矩MA等于()。<img src='https://img2.soutiyun.com/1/2021-04-08/986750384275517.png' />
A.0
B.2Fa/3(右侧受拉)
C.Fa(左侧受拉)
D.Fa(右侧受拉)
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图示结构与力法基本体系,EI=常数,力法方程中的自由项△1P=______。
图示结构与力法基本体系,EI=常数,力法方程中的自由项△<sub>1P</sub>=______。
<img src='https://img2.soutiyun.com/ask/2020-01-07/947277844507456.png' />
-
图7-3-6所示结构,当支座B发生沉降时,支座B处梁截面的转角大小为(),方向为().(设EI为常数)
图7-3-6所示结构,当支座B发生沉降<img src='https://img2.soutiyun.com/ask/2020-12-17/977082920820169.png' />时,支座B处梁截面的转角大小为(),方向为().(设EI为常数)
<img src='https://img2.soutiyun.com/ask/2020-12-17/977082909031495.png' />
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图(a)桁架力法基本结构如图(b),力法典型方程中的系数δ<sub>11</sub>为()
A.3.4141/EA
B.-4.8281/EA
C.4.8281/EA
D.2.01/EA
<img src='https://img2.soutiyun.com/ask/2021-01-26/980527363731291.png' />
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图(a)所示结构发生图示支座移动,其力法基本结构如图(b),则其基本方程<img src="https://img2.soutiyun.com/shangxueba/askkp/2022-06/30/1147/20220630163535637.png" alt=""/>中的自由项c1和c2分别等于______和______。()
<img src="https://img2.soutiyun.com/shangxueba/askkp/2022-06/30/88/20220630163542803.png" alt=""/>
A.A.-a、0
B.B.-a、-D/h
C.C.0、-D/h
D.D.0、0
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图(a)所示对称结构,EI=常数,若取图(b)为其对称力法基本体系,则δ12=___________,Δ1P=_________
图(a)所示对称结构,EI=常数,若取图(b)为其对称力法基本体系,则δ12=___________,Δ1P=____________。
<img src='https://img2.soutiyun.com/1/2021-04-08/986740267216158.jpg' />
-
图(a)结构,EI=常数,图(b)为力法基本体系,典型方程中的△1P为______。
图(a)结构,EI=常数,图(b)为力法基本体系,典型方程中的△<sub>1P</sub>为______。
<img src='https://img2.soutiyun.com/ask/5331001-5334000/46e0d2f1907fe89d42e6797a46c558e8.jpg' />
-
图(a)结构取图(b)为力法基本体系,则自由项。()
图(a)结构取图(b)为力法基本体系,则自由项。()
<img src='https://img2.soutiyun.com/ask/2021-01-26/980528785074587.png' />
<img src='https://img2.soutiyun.com/ask/2021-01-26/980528797762313.png' />
此题为判断题(对,错)。
-
用力法求图中所示结构弯矩图,EI为常数。
<img src='https://img2.soutiyun.com//1/2021-05-26/990874877206174.jpg' />
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图(a)所示梁,取图(b)所示基本结构,则其力法典型方程为______。<img src='https://img2.soutiyun.com/ask/5331001-5334000/7f7022b97212479974fc893e8ba13d56.jpg' />
A.δ<sub>11</sub>X<sub>1</sub>+δ<sub>12</sub>X<sub>2</sub>=0,δ<sub>21</sub>X<sub>1</sub>+δ<sub>22</sub>X<sub>2</sub>=-φ
B.δ<sub>11</sub>X<sub>1</sub>+δ<sub>12</sub>X<sub>2</sub>=φ,δ<sub>21</sub>X<sub>1</sub>+δ<sub>22</sub>X<sub>2</sub>=0
C.δ<sub>11</sub>X<sub>1</sub>+δ<sub>12</sub>X<sub>2</sub>=0,δ<sub>21</sub>X<sub>1</sub>+δ<sub>22</sub>X<sub>2</sub>=φ
D.δ<sub>11</sub>X<sub>1</sub>+δ<sub>12</sub>X<sub>2</sub>=0,δ<sub>21</sub>X<sub>1</sub>+δ<sub>22</sub>X<sub>2</sub>=0
-
图a)所示桁架,EA=常数,取图b)为力法基本体系,则力法方程系数间的关系为:()<img src='https://img2.soutiyun.com/shangxueba/ask/18738001-18741000/18740656/2016071809254342901.jpg' />
A.δ<sub>11</sub>=δ<sub>22</sub>,δ<sub>12</sub>>0
B. δ<sub>11</sub>≠δ<sub>22</sub>,δ<sub>12</sub>>0
C. δ<sub>11</sub>≠δ<sub>22</sub>,δ<sub>12</sub><0
D. δ<sub>11</sub>=δ<sub>22</sub>,δ<sub>12</sub><0