目录
目录 ······························································································································································································································ 1 西安建筑科技大学考试试卷（答案）一 ································································································································································ 2
二． 三． 四． 五． 五． 六．
(15分) ························································································································································································ 3 (15分) ························································································································································································ 3 (15分) ························································································································································································ 4 (15分) ························································································································································································ 4 (15分) ························································································································································································ 5 (20分) ························································································································································································ 5
西安建筑科技大学考试试卷(答案)二 ····································································································································································· 6
一． 二． 三．
选择题 ························································································································································································ 6 填空题 ························································································································································································ 7 计算题 ························································································································································································ 8
材 料 力 学 答 案 (A 卷) ····················································································································································································· 9
一． 三．
选择题 ······················································································································································································ 10 计算题 ······················································································································································································ 10
二．填空题 ···························································································································································································· 10
西安建筑科技大学考试试卷(答案)三 ···································································································································································· 11
一．选择题 ···························································································································································································· 11 二． 三． 四．
(15分) ······················································································································································································ 12 (15分) ······················································································································································································ 13 (20分) ······················································································································································································ 13
五． (15分) ·························································································································································································· 13
工 程 力 学 (A 卷)答 案 ··················································································································································································· 14
一． 二． 三． 四． 五． 六．
选择题 ······················································································································································································ 14
(15分) ······················································································································································································ 14 (15分) ······················································································································································································ 14 (15分) ······················································································································································································ 15 (20分) ······················································································································································································ 15 (15分) ······················································································································································································ 15
西安建筑科技大学考试试卷(答案)四 ··································································································································································· 15
一．选择题 ···························································································································································································· 15 二．
计算题 (15分) ········································································································································································ 16
三．填空题 ···························································································································································································· 16
材 料 力 学答 案 ··································································································································································································· 19
一. 选择题 ····························································································································································································· 19
1
二.计算题(15分) ··················································································································································································· 19 三.填空题 ······························································································································································································· 19 四． 五． 七．
(15分) ······················································································································································································ 19
（15分) ···················································································································································································· 20
(15分) ······················································································································································································ 20
六．（15分） ························································································································································································· 20
西安建筑科技大学考试试卷（答案）一
选择题
1. (5分)
变截面杆受集中力P作用，如图。设F1，F2和F3分别表示杆件中截面1-1，2-2和3-3上沿轴线方向的内力值，则下列结论中哪个是正确的？ (A)F1=F2=F3； (B)F1=F2≠F3； (C)F1≠F2=F3； (D)F1≠F2≠F3。
正确答案是 (A) 。
123P231
2. (5分)
低碳钢试件拉伸时，其横截面上的应力公式?=N/A (A)只适用于?≤?p； (B)只适用于?≤?e； (C)只适用于?≤?s； (D)在试件拉断前都适用。
正确答案是 D 。 3. (5分)
梁的内力符号与坐标系的关系是: (A)剪力、弯矩符号与坐标系有关； (B)剪力、弯矩符号与坐标系无关；
(C)剪力符号与坐标系有关，弯矩符号与坐标系无关； (D)弯矩符号与坐标系有关，剪力符号与坐标系无关。
正确答案是 B 。 4. (5分)由惯性矩的平行移轴公式，Iz2的答案有四种: (A)Iz2=Iz1+bh3/4； (B)Iz2=Iz+bh3/4； (C)Iz2=Iz+bh3；
2
yh/2zh/2z1h/2b/2b/2z2(D)Iz2=Iz1+bh3。
正确答案是 (C) 。
二． (15分)
图示轴向拉压杆A=1000mm，P=10kN，纵向分布载荷q=10kN/m，a=1m。求1-1截面的应力?
2
和杆中?max。
D答案 ?1=5MPa， (5分)； ?max=10MPa。 (10分)
1Pq1aa/2a/2
三． (15分)
钢制圆轴的直径为d，材料的许用剪应力[?]=30MPa。求:(1)选择轴的直径；(2)将m3和m4互换重
选直径。
m1=0.2m2=0.3m3=0.5m4=1.0(kN?m)0.60.50.6(m)
(1)16Tmax/(?d3)≤[?] (5分) ； d=55.4mm (5分)； (2)互换后 Tmax=0.5kN?m d=43.9mm (5分)
3
1.0T图0.2(1)0.50.20.5(2)0.5
四． (15分)
作梁的Q、M图。
PPaaaa
答案如图示
（7分)
P㈩Q㈠PM㈠PaPa (8分)
五． (15分)
圆截面悬臂梁受载如图。当梁长为l，直径为d时，最大弯曲正应力达到许用值。今欲将梁增长至
2l，为满足强度要求，直径应增为d的多少倍。
4
qdl
五． (15分)
[?]=(ql/2)/(?d/32) (5分)
2
3
设梁长增倍后直径应增为nd，则
[?]=[q?(2l)2/2]/[??(nd)3/32] (5分) 解得 n=1.6倍。 (5分)
六． (20分)
图示T形截面铸铁梁，已知[?t]=30MPa，[?c]=60MPa，试计算许用载荷[P]之值。(C为形心)
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