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兰大《结构力学》13春在线作业4（Lanzhou structural mechanics,

spring 13 online homework 4）

14 spring 13 autumn big orchid \mechanics\13 spring online homework 4

Total score: 100 test time: -

Radio examination

Judgment question

Radio examination questions (20 questions, 60 points)

1.. The system with the same internal force and displacement dynamic coefficient is calculated when the system (excluding the distribution mass of beam) is calculated in Figure 117

A. homework answer did not upload, first for everyone to review the use, if you need to answer the specific see my registration name to find B. C. D.

Full marks: 3

2.. Figure 44. Reciprocal theorem of reciprocal reaction for

two states of structure r12=r21, R12 and R21 are dimensions A. force

B. dimensionless

C. force / dimension

D. length / force

Full marks: 3

3. commonly used structural types of bars include ()

A. beam, arch, bent and so on

B. beam, arch, rigid frame, etc.

C. beam, arch, suspension structure, etc.

D. beam, rigid frame, suspension structure, etc.

Full marks: 3

4. figure 104 structure AB rod axial force is () excluding axial deformation, EI= constant A. B.

C. D.

Full marks: 3

5.. Fig. 57 the influence line of the support reaction force R in the beam is () A. B. C. D.

Full marks: 3

6., figure 43, the answer is not uploaded, first for everyone to review the use, and if you need to answer the specific, look at my registration name, to find the cantilever beam, the cross section of the impact of the bending moment, the line shape is () A. B. C.