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复习资料3

复习资料3
复习资料3

一、填空题

(一)单厂

1、在单层厂房排架计算中,假定排架柱下端与基础___刚接___,上端与屋架或屋面梁___铰接___。

2、单层厂房结构的变形缝有___伸缩缝___、__沉降缝____和_防震缝___。

3、在装配式钢筋混凝土单层厂房中,支撑通常包括___屋盖支撑___支撑和__柱间__支撑两部分。

4、单层厂房排架计算时,屋面均布活荷载不与雪荷载同时考虑,仅取两者中的较__大值。

5、单层厂房排架内力计算的主要目的是为设计__柱子____和_基础截面__提供内力数据。

6、当厂房内一层有多台吊车,进行多跨排架的内力分析时,吊车的竖向荷载最多按4 台考虑,水平荷载最多按 2 台考虑。

7、在装配式钢筋混凝土单层厂房中,支撑通常包括__屋盖___支撑和___柱间__支撑两部分。

(二)肋梁楼盖

1、单向板肋梁楼盖,主梁的截面有效高度h0:一排钢筋时取h0=h-(50`60) 两排钢筋时取h0=h-(70`80) 。

2、按楼盖、屋盖作为水平不动铰支座对墙、柱进行静力计算的方案称为___刚性__方案。

3、按弹性理论对单向板肋梁楼盖进行计算时,板的折算恒载g'= g+q/2 ,折算活载q'=q/2。

4、计算现浇楼盖中连续梁正截面承载力时,跨中按__T_型__截面计算,支座则按_矩形____截面计算。

5、常用的现浇楼梯有__板式__和___梁式_两种。

6、对于等跨度或跨度相差不超过10%)、等刚度、等荷载且跨数超过5跨的连续梁可按5跨计算。

7、双向板上荷载向两个方向传递,长边支承梁承受的荷载为梯形分布;短边支承梁承受的荷载为三角形分布。

8、用弹性理论求多跨连续双向板某区格的跨中最大正弯矩,当考虑活荷载的最不利布置时,板上的恒载应该按全跨考虑,活荷载应该按本跨布隔跨布考虑。9、对于跨数超过五跨的等截面连续梁,若各跨所受荷载的条件相同,可按_五跨__计算。

(三)砌体结构

1、对于矩形截面构件,当轴向力偏心方向的截面边长大于另一方向的截面边长时,除了按_偏心受压______计算外,还应对较小边长按___轴心受压___计算承载力。

2、由___块体___和__砂浆____砌筑而成的整体材料称为砌体。

3、挑梁埋入砌体内的长度,通常取大于挑出长度的1.2倍为宜,挑梁如果处于屋盖处时不少于2倍的挑出长度。

4、承重框架的布置方案可以有__横向框架承重、纵向框架承重__和___纵横向框架承重。

5、砌体结构房屋静力计算方案分为_刚性方案_____、_弹性方案_____、_刚弹性方案_三种。

6、当圈梁被门窗洞口截断时,应在洞口上部增设相同截面的附加圈梁。

7、对于矩形截面构件,当轴向力偏心方向的截面边长大于另一方向的截面边长时,除

了按偏心受压计算外,还应对较小边长按轴心受压计算承载力。

8、当过梁上的墙体高度h w≥L n/3时,按高度为Ln/3 的墙体自重计算荷载。

9、无筋砌体受压构件承载力计算公式适于偏心距 e ≤0.6y 。

10、在砌体结构中,雨篷除应对雨篷梁、板的承载力进行计算外,还必须进行_整体抗倾覆_____验算。

11、带壁柱墙的高厚比验算包括_整片墙_____的高厚比验算与__壁柱间墙____的高厚比验算。

(四)多层框架

1、在框架截面设计时,框架柱按偏心受压构件设计,框架梁按___受弯构件___设计。

2、多层框架在水平荷载作用下的近似内力计算方法—D值法,实际上是对反弯点法中抗侧刚度______和_反弯点高度_____进行了修正。

3、当框架结构梁与柱的线刚度之比超过3时,可采用___反弯点___法进行水平荷载作用的近似计算。

4、多层框架在水平荷载作用下内力的计算方法有反弯点、D值两种。

5、多层多跨框架在竖向荷载作用下的近似内力计算中,除底层柱子以外的其它层柱子的线刚度均要乘以_0.9_____的折减系数。

6、多层框架在水平荷载作用下的近似内力计算方法——D值法,实际上是对反弯点法中抗侧刚度和反弯点高度进行了修正。

二、单项选择题

(一)单厂

1、在进行单层厂房结构设计时,若屋面活荷载、雪荷载、积灰活载同时存在,则(B)同时考虑。

A.屋面活载与雪荷载,积灰荷载

B.积灰荷载与屋面活载或雪荷载中较大值

C.屋面活载与积灰荷载或雪荷载中较大值

D.只考虑三者中的最大值

2、厂房排架牛腿的计算简图应是(B )。

A.一端自由,一端固接于排架柱上的悬臂梁

B.以纵筋为拉杆,以混凝土斜撑为压杆构三角形桁架

C.直接承受吊车梁传来荷载作用的轴心爱压短柱

D.直接承受用车梁传来荷载作用的偏心受压短柱

3、关于排架内力组合下列说法不正确的是(C)。

A.恒荷载必参与组合

B.每次只以一种内力为目标

C.左、右风荷同时参与组合

D. 要考虑吊车的台数

4、单层厂房预制柱进行吊装验算时,由于起吊时惯性力的影响,需考虑动力系数,一般取( D )。

A.1.1

B.1.2

C.1.35

D.1.5

5、单层厂房吊车横向水平荷载在柱上的作用位置为(A)。

A.吊车梁顶面水平处

B.大车与轨道接触点水平处

C.支撑吊车梁的牛腿顶面

D.小车与轨道接触点水平处

6、.关于单层工业厂房整体空间作用,下列说法不正确的是(A)。

A.无檩体系与有檩体系整体空间作用大

B.局部荷载比均布荷载整体空间作用大

C.山墙起相当大的作用

D.与屋盖形式无关

7、7.为了设计上的便利,对于四边均有支承的板,当( D )按单向板设计。 A.212

≤l l B. 112≤l l C. 312≤l l D. 312≥l l

8、单层厂房柱进行内力组合时,任何一组最不利内力组合中都必须包括( A )引起的内力。

A.恒载

B.吊车荷载

C.风荷载

D.屋面活荷载

9、因为吊车梁承受多次重复荷载,所以除进行静力计算外,还要进行(C )强度验算。

A.抗弯

B.承载力

C.疲劳

D.局部受压

10、工业厂房屋面活荷载不包括( D )。

A.屋面均布活荷载

B.积灰荷载

C.雪荷载

D.吊车荷载

11、无檩体系与有檩体系单层工业厂房相比(A )

A.前者空间刚度大

B.前者抗弯性能好

C.后者空间刚度大

D.后者的抗剪性能好

12、吊车的横向水平荷载是通过吊车梁的( D )传给柱。

A.吊车梁底部

B.吊车梁顶面

C.吊车梁中部

D.吊车梁上部轨道

13、.对单层厂房结构进行受力份析,一般仅取( D )进行受力份析。

A. 横向平面排架

B. 纵向平面排架

C. 空间受力体系

D.横、纵向排架

(二)肋梁楼盖

1、五跨等跨连续梁,现求最右端第二支座最大负弯矩时,活荷载应布置在哪几跨?( C )

A.1,2,4

B. 2,3,4

C.2,4,5

D. 1,3,5

2、主梁设计一般采用(A )计算。

A.弹性理论

B.塑性理论

C.弹、塑性理论均可

D.弹塑性理论

3、下列不属于板内分布钢筋作用的是( D )。

A.使主筋定位

B.分布局部荷载

C.承受温度和收缩应力

D.提高板的抗剪能力

4、整体单向板肋梁楼盖中,连续主、次梁按正截面承载力计算配筋时,跨中按( A )截面计算,支座按( )截面计算。

A.T 形 矩形

B.矩形 T 形

C.全部按矩形

D.全部按T 形

5、五跨等跨连续梁,现求最左端支座最大剪力,活荷载应布置在哪几跨?( D )

A.1,2,4

B. 2,3,4

C. 1,2,3

D. 1,3,5

6、在计算钢筋混凝土肋梁楼盖连续次梁内力时,为考虑主梁对次梁的转动约束,用折算荷载代替实际计算荷载,其做法是( B )

A.减小恒载,减小活载

B.增大恒载,减小活载

C.减小恒载,增大活载

D.增大恒载,增大活载

7、五跨等跨连续梁,现求最左端第一跨跨中最大弯矩,活荷载应布置在哪几跨?( D )

A.1,2,4

B. 2,3,4

C. 1,2,3

D. 1,3,5

8、对于梁式楼梯,斜梁内将产生( A )。

A.M 和V

B.M 、N 和V

C.M 、V 和T

D.N 、V 和T

9、按弹性方法计算现浇单向肋梁楼盖时,对板和次梁采用折算荷载来进行计算,这是因为考虑到( C )

A .在板的长跨方向能传递一部分荷载

B .塑性内力重分布的影响

C .支座转动的弹性约束将减少活荷载布置对跨中弯矩的不利影响

D .出现活荷载最不利布置的可能性较小

10、现浇钢筋混凝土单向板肋梁楼盖的主次梁相交处,在主梁中设置附加横向钢筋的目的是( D )。

A.承担剪力

B.防止主梁发生受弯破坏

C.防止主梁产生过大的挠度

D.防止主梁腹部由于斜裂缝引起的局部破坏

11、按单向板进行设计( C )。

A.600mm×3300mm 的预制空心楼板

B.长短边之比小于2的四边固定板

C.长短边之比等于1.5,两短边固定,两长边简支

D.长短边相等的四边简支板

12、四跨等跨连续梁,现求最左端支座最大剪力,活荷载应布置在哪几跨?( D )

A.1,2,4

B. 2,4

C. 1,2

D. 1,3

13、四跨等跨连续梁,现求最左端第一跨跨中最大弯矩,活荷载应布置在哪几跨?( D )

A.1,2,4

B. 2,4

C. 1,2

D. 1,3

14、塑性铰的转动能力调幅截面的相对高度ξ有关,ξ增大,塑性铰的转动能力降低,为使塑性铰有足够的转动能力,ξ应满足( C )

A.b ξξ≤

B.b ξξ=

C.35.0≤ξ

D.35.0>ξ

15、五跨等跨连续梁,现求最左端第二支座最大负弯矩时,活荷载应布置在哪几跨?( A )

A.1,2,4

B. 2,3,4

C. 1,2,3

D. 1,3,5

(三)砌体结构

1、挑梁不会发生下列哪种破坏?( C )

A.倾覆破坏

B.挑梁下砌体局部受压破坏

C.挑梁正截面和斜截面破坏

D.挑梁下墙体压坏

2、砌体强度设计值以下( A )情况下不需进行调整。

A.采用混合砂浆砌筑的各类砌体

B.无筋砌体构件截面积小于0.3m 2

C.配筋砌体构件截面积小于0.2m 2

D.跨度不小于9m 的梁下烧结普通砖砌体

3、砌体轴心抗拉、弯曲抗拉和抗剪强度主要取决于下列中的哪个因素?( A )

A.砂浆的强度

B.块体的抗拉强度

C.砌筑方式

D.块体的形状和尺寸

4、关于影响房屋空间刚度大小的主要因素,下述见解正确的是(D )

A.仅与横墙的间距有关

B.仅与屋盖、楼盖的类型有关

D.A 、B 及C

7、砌体结构中,墙体的高厚比验算与下列( B )项无关

A.稳定性

B.承载力大小

C.开洞及洞口大小

D.是否承重墙

8、当梁在砌体上的实际支承长度a 小于计算的有效支承长度0a 时,梁端砌体局部受压

计算中应取(B )。

A.0a

B.a

C.20a a +

D. 0a 或a

9、影响砌体结构房屋空间工作性能的主要因素是(C )。

A.房屋结构所用的块材和砂浆的强度等级

B.外纵墙的高厚比和门窗洞口的开设是否超过规定

C.房屋屋盖、楼盖的类别和横墙的间距

D.圈梁和构造柱的设置是否满足规范的要求

10

A 、240×115×53mm

B 、240×100×70mm

C 、240×150×53mm

D 、300×215×60mm

11、砌体结构受压构件承载力计算公式的?表示( C )

A.荷载偏心距对承载力的影响

B.构件高厚比对承载力的影响

C.荷载偏心距与构件高厚比对承载力的影响

D.砂浆和块材强度对承载力的影响

12、在砌体结构房屋中,( A )不是圈梁的主要作用

A.提高房屋构件的承载能力

B.增强房屋的整体刚度

C.防止由于较大振动荷载对房屋引起的不利影响

D.防止由于地基不均匀沉降对房屋引起的不利影响

12、各类砌体采用水泥砂浆砌筑时,其抗压强度按表中的数值乘以( A )。

A. 0.9

B. 0.75

C. 0.85

D. 1.0

14、砌体结构中,墙体的高厚比验算与下列( B )项无关。

A.稳定性

B.承载力大小

C.开洞及洞口大小

D.是否承重墙

15、在砌体结构房屋中,(A )不是圈梁的主要作用

A.提高房屋构件的承载能力

B.增强房屋的整体刚度

C.防止由于较大振动荷载对房屋引起的不利影响

D.防止由于地基不均匀沉降对房屋引起的不利影响

16、单层刚性方案承重墙内力计算时,其计算简图为( A )

A.墙体上端与屋盖铰接,下端与基础固结,屋盖为墙体的不动铰支座

B.墙体上端与屋盖铰接,下端与基础铰结,屋盖为墙体的不动铰支座

C.墙体上端与屋盖固接,下端与基础铰结,屋盖为墙体的不动铰支座

D.墙体上端与屋盖固接,下端与基础固结,屋盖为墙体的不动铰支座

17、在水平荷载作用下,多层刚性方案房屋纵墙内力计算与( C )相同。

A.横向连续梁

B.横向简支梁

C.竖向连续梁

D.竖向简支梁

18、砌体房屋的静力计算,根据 ( D ) 分为刚性方案、弹性方案和刚弹性方案。

A.材料的强度设计值

B.荷载的大小

C.受力的性质

D.房屋的空间工作性能

19、砖砌体的抗压强度较砖的抗压强度( B )。

A 、高

B 、低

C 、相同

D 、高、低均有可能

(四)多层框架

1、框架结构中,梁的截面惯性矩I b 应根据梁与板的连接方式而定。对于现浇整体式框架梁,中框架梁、边框架梁的截面惯性矩应为( C )。

A.05.1I I b =、02.1I I b =

B.02.1I I b =、00.1I I b =

C.00.2I I b = 、05.1I I b =

D.05.1I I b =、00.1I I b =

2、水平荷载作用下每根框架柱所分配到的剪力与( B )直接有关。

A.矩形梁截面惯性矩

B.柱的抗侧移刚度;

C.梁柱线刚度比

D.柱的转动刚度。

3、框架结构在水平荷载作用下,当梁柱的线刚度比小于3时,其内力计算方法应采用( C )

A.分层法

B.弯矩二次分配法

C.反弯点法

D.D 值法

4、关于框架柱的反弯点,以下结论正确的是( A )

A.上层梁的线刚度增加会导致本层柱反弯点下移;

B.下层层高增大会导致本层柱反弯点上移;

C.柱的反弯点位置与柱的楼层位置有关,与结构总层数无关;

D.柱的反弯点位置与荷载分布形式无关。

5、采用分层法计算内力时,为了减小计算简图与实际情况不符产生误差,必须进行修正,以下叙述正确的是( C )。

A.底层柱的线刚度乘以折减系数0.9,底层柱的弯矩传递系数取为1/3;

B.除底层以外其他各层柱的线刚度均乘以折减系数0.9,底层柱的弯矩传递系数取为1/3;

C.除底层以外其他各层柱的线刚度均乘以折减系数0.9,除底层以外其他各层柱的弯矩传递系数取为1/3;

D.底层柱的线刚度乘以折减系数0.9,除底层以外其他各层柱的弯矩传递系数取为1/3。

6、在用分层法计算竖向荷载作用下的框架内力时,除底层柱外,其它各层柱的弯矩传递系数为( B ) A.41

B. 31

C. 21

D.1

7、采用D 值法计算框架内力时,各柱反弯点高度取决于该柱上下端转动情况,即与( B )等因素有关。

1)该柱所在楼层的位置; 2)梁、柱线刚度比;

3)该柱上下横梁的线刚度比; 4)该柱上下层层高变化。

A.1)和2)

B.2)和3)

C.1)、2)和4)

D.1)、2)、3)和4)

8、竖向荷载作用下框架结构内力计算方法( A )

A.分层法

B.底部剪力法

C.D 值法

D.反弯点法

9、反弯点法可用在( D )

A.竖向荷载作用下,梁柱线刚度比小的框架

B.竖向荷载作用下,梁柱线刚度比大的框架

C.水平荷载作用下,梁柱线刚度比小的框架

D.水平荷载作用下,梁柱线刚度比大的框架

10、以下关于竖向荷载作用下框架内力分析方法——分层法的概念中,( D )项不正确。

A.不考虑框架侧移对内力的影响;

B.每层梁上的竖向荷载仅对本层梁及其相连的上、下柱的弯矩和剪力产生影响,对其他各层梁、柱弯矩和剪力的影响忽略不计;

C.上层梁上的竖向荷载对其下各层柱的轴力有影响;

D.按分层计算所得的各层梁、柱弯矩即为该梁的最终弯矩,不再叠加。

11、 水平荷载作用下的多层框架结构,当某层其他条件不变,仅其柱上端梁刚度降低,该层柱的反弯点位置(A )

A .向上移动

B .不变

C .向下移动至52层高处

D .向下移动至3

1层高处 三、判断题

(一)单厂

1、吊车梁因承受重复荷载,因此设计时须进行疲劳验算。 ( ? )

2、考虑多台吊车水平荷载时,对单跨和多跨厂房的每个排架,参与组合的吊车台数不应多于2台。 ( √ )

3、单层厂房排架计算的目的是为柱和基础的设计提供内力依据。( √ )

4、单层厂房柱内力组合时,考虑吊车水平荷载作用时,须同时考虑吊车竖向荷载作用。 √

5、重级工作制吊车是指起吊吨位大的吊车。 (× )

6、在排架荷载计算中,作用在上柱轴线上的轴力要考虑对下柱轴线偏心所引起的弯矩。

(√)

(二)肋梁楼盖

1、钢筋混凝土连续梁中,塑性铰总在支座处出现。(×)

2、连续梁边跨跨中最大弯矩发生1/2跨长截面处。(√)

3、不论静定或超静定钢筋混凝土结构,随外载的增大,均存在截面应力重分布现象。

(×)4、当现浇肋梁楼盖的主梁与柱的线刚度比大于5时,按框架结构计算。(√)

(三)砌体结构

1、砌体结构房屋中,在墙体内沿水平方向设置封闭的钢筋混凝土梁称为过梁。( ×)

2、带壁柱墙的高厚比验算只验算整片墙的高厚比。( ×)

3、圈梁在洞口处,尚可兼作过梁。(√)

4、各种砌体,当用水泥砂浆砌筑时,其抗压强度设计值,应按规范表中数值乘以调整系数0.85。(×)

5、圈梁宜连续地设在同一水平面上并形成封闭状,当圈梁被洞口截断时,应在洞口上部增设相同截面的附加圈梁。(√)

6、对砌块砌体,当过梁上的墙体高度h w≥L n/2时(L n为过梁的净跨),过梁上的墙体荷载不应按墙体高度hW计算。(√)

7、墙梁按承受荷载分类可分为承重墙梁和自承重墙梁。(√)

8、纵墙承重结构房屋横向刚度较大,整体性好,抵抗风荷载、地震作用以及调整地基不均匀沉降的能力较强。( ×)

9、圆形水池和筒仓均属于偏心受拉构件。(×)(四)多层框架

1、用D值法计算水平荷载下框架内力时,当柱上端转角大于柱下端转角,反弯点偏于柱下端。(×)

2、用D值法计算水平荷载下框架内力时,梁柱线刚度比越大,中间层反弯点越接近1/2。

(√)3、由于单向板上的荷载主要沿一个方向传递,所以仅需在板中该方向配置钢筋即可。

(×)4、求多跨连续双向板某区格的跨中最大正弯矩时,板上活荷载应该按满布考。(×)

()

5、用分层法计算时,各层横梁的弯矩值即为相应分层的计算值。(×)

6、D值法适用于梁柱线刚度比不太大或上下层层高高度变化较大时(√)

7、刚性和刚弹性砌体房屋,其横墙厚度应不小于120mm。(×)

8、用分层法计算竖向荷载作用下的内力时,要对线刚度和弯矩传递系数进行调整如下:将各柱乘调整系数0.9折减系数;弯矩传递系数改取为1/3。(×)。

9、反弯点法适用于各层结构比较均匀(各层高度变化不大,梁的线刚度变化不大),节点梁柱线刚度比∑i b/∑i c≥3的各层框架。(×)

10、分层法计算所得的节点弯矩之和经常不为零,原因是由于分层计算单元与实际结构不符带来的误差,此时可对节点不平衡力矩再作一次分配,予以修正。

(√)

四、简答题

(一)多层框架

1、框架结构梁、柱的控制截面及最不利内力有哪些?

2、分层法计算竖向荷载作用下的内力时,为何要对线刚度和弯矩传递系数进行调整?如何调整?

3、用反弯点法计算水平荷载作用下框架结构的内力时,有哪些基本假定?

4、什么叫D值法?它对反弯点法修正了什么?

(二)砌体结构

1、什么是砌体结构墙柱的高厚比,为什么要进行高厚比验算?

2、砌体结构房屋静力计算方案划分的依据是什么?分为几种?

3、当梁端支承处砌体局部受压承载力不满足时,可采取哪些措施?

4、如何确定过梁上的荷载?

5、砌体结构房屋中圈梁的作用?

6、墙梁计算内容有哪些?

7、《规范》对刚性和刚弹性方案房屋中的横墙有和要求?

8、挑梁倾覆破坏时的计算倾覆点x0如何采用?

9、.什么是构件的高厚比,为什么验算高厚比?

10.什么是砌体结构?砌体按所采用的材料不同可以分为哪几类?

(三)肋梁楼盖

1、钢筋混凝土受弯构件塑性铰与计算简图中的理想铰有什么不同之处?

2、什么是单向板?什么是双向板?单向板和双向板是如何区分的?

3、试说明单向板肋梁楼盖的传力途径?其梁、板的计算模型是什么?

4、现浇混凝土楼盖的设计步骤如何?

5、单向板肋形楼盖由哪些构件组成?其荷载传递途径如何?

6、板中分布钢筋有哪些作用?

7、使用弯矩调幅法进行设计计算时,应遵守下列原则?

(四)单厂

1、当排架上有任意荷载作用时,采用剪力分配法计算时可以分为哪三个步骤?

2、确定排架的计算简图时一般钢筋混凝土排架通常作哪些假定?

3、短牛腿的计算简图是怎样的?

4、简述单层厂房承受的主要竖向荷载及传递路线?

5、如何考虑多台吊车的荷载组合?

6、试述单厂排架计算简图的基本假定,并绘出计算简图?

7、排架柱的控制截面如何确定?

8、屋面活荷载包括哪些?如何考虑这些荷载的作用?

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