判断题
(×)1钢筋混凝土构件采HRB335级钢筋时混凝土强度等级宜低C15
(×)2截面材料钢筋螺旋箍筋钢筋混凝土柱承载力普通箍筋钢筋混凝土柱承载力低
(√)3正常实极限状态实设计表达式中需考虑结构重性系数
(×)4受弯构件斜截面承载力剪跨增减少
(×)5受弯构件配筋率钢筋截面面积构件全截面面积
(√) 6计算剪跨集中荷载作点支座距离a梁效高度h0值
(×)7配筋率钢筋截面面积结构全截面面积
(√)8斜拉破坏发生剪跨较腹筋配置少时
(×)9剪压破坏塑性破坏斜拉破坏斜压破坏脆性破坏
(√)10偏压构件中离轴力较远侧钢筋破坏时受压受拉应力般达屈服强度
(√)11结构极限状态分成承载力极限状态正常极限状态
(×)12通配筋率防止剪压破坏发生
(√)13混凝土受压区高度超翼缘高度第二类T形截面
(×)14条件相时采水泥砂浆混合砂浆砌筑砌体强度相等
(√)15预应力混凝土构件中采高强度等级钢筋混凝土
(√)16规范房屋屋盖楼盖类横墙间距划分砌体结构静力计算方案
(×)17框架承重利增加房屋横刚度梁截面尺寸较
(×)18弹性静力计算方案结构水荷载作屋面结构成外墙动铰支座
二选择题
1国规范采(A)强度作混凝土种力学指标代表值
A立方体抗压强度标准值 B轴心抗压强度
C轴心抗拉强度 D劈拉强度
2明显流幅钢筋设计强度取值般(C)
A应变应应力 B极限抗拉强度
C屈服强度 D例极限
3混凝土强度等级C30列说法正确(A)
A立方体抗压强度标准值达30Nmm2
B轴心抗压强度达30Nmm2
C立方体抗压强度标准值达30Nm2
D轴心搞拉强度达30Nm2
4永久荷载效应控制力组合永久荷载活荷载分项系数取(A)
A135T 14 B1214
C1213 D12135
5类环境类梁保护层厚度规定(B)
A钢筋直径20mm B 钢筋直径25mm
C 钢筋直径30mm D 钢筋直径40mm
6类环境中布置单排受力钢筋梁截面效高度般取(B)
Ah60 Bh35 Ch20 Dh
7受弯混凝土构件筋配筋率配筋率般称(B)
A适筋梁 B少筋梁 C超筋梁 D腹筋梁
8般受弯构件V≤07bh0ƒt时(C)
A直接配箍率配箍
B直接规范构造求箍筋间距箍筋直径配箍率
C箍筋间距直径配筋验算配箍率
D计算配箍
9轴心受压构件稳定系数(C)关
A混凝土强度 B配筋率 C长细 D荷载
10双筋矩形截面梁正截面承载力计算公式第二适条件物理意义(C)
A防止出现超筋破坏 B防止出现少筋破坏
C保证受压钢筋达规定抗压设计强度
D保证受拉钢筋达规定抗拉设计强度
11混凝土规范规定矩形截面偏心受压构件长细l0h(C)时取1
A≤8 B≤175 C≤5 D≤6
12称配筋钢筋混凝土受压柱偏压构件判断条件(C)
A时偏压构件 B时偏压构件
C时偏压构件 D时偏压构件
13普通砖砌体结构构件截面面积A<03㎡时强度设计值应调整系数(C)
A075 B089 C07+A D09
14影响砖砌体抗压强度素(C)
A砂浆强度等级影响砌体抗压强度素
B砂浆品种砌体抗压强度没影响
C提高砖厚度提高砌体抗压强度
D砌筑质量坏砌体强度没影响
15适筋梁破坏特征(D)
A破坏前明显预兆 B受压钢筋先屈服压区混凝土压碎
C脆性破坏 D受拉钢筋先屈服压区混凝土压碎
16钢筋混凝土双筋梁偏压构件正截面承载力计算中求受压区高度目(A)
A保证受压钢筋破坏时达抗压强度设计值 B防止受压钢筋压屈C避免保护层剥落 D保证受压钢筋破坏时候达极限抗压强度
17条件满足腹筋梁发生斜压剪压斜拉破坏形态时梁斜截面抗剪承载力致关系(A)
A斜压破坏承载力>剪压破坏承载力>斜拉破坏承载力
B剪压破坏承载力>斜压破坏承载力>斜拉破坏承载力
C斜拉破坏承载力>斜压破坏承载力>剪压破坏承载力
D剪压破坏承载力>斜拉破坏承载力>斜压破坏承载力
18排架结构中柱柱间支撑柱柱间支撑设置位置合理(B)
A柱柱间支撑设伸缩缝区段中部柱间
B柱柱间支撑设伸缩缝区段中部两端柱间
C柱柱间支撑设伸缩缝区段两端柱间
D柱柱间支撑设伸缩缝区段中部两端柱间
19(A)房屋静力计算时墙柱作屋盖(楼盖)动铰支座竖构件计算
A刚性方案 B弹性方案
C刚弹性方案 D刚性刚弹性方案
三简答题
1试述着配筋率变化梁正截面破坏形式变化
答:着配筋率增出现少筋适筋超筋三种破坏形式少筋梁破坏特征旦出现裂缝裂缝迅速开展构件宣告破坏适筋梁破坏特征受拉钢筋先屈服压区混凝土压碎塑性破坏破坏前预兆超筋梁破坏特征受压区混凝土压碎时受拉钢筋尚未达屈服强度少筋超筋破坏均脆性破坏
2适筋梁加荷开始构件破坏历三阶段分什?阶段末应力状态作什验算?
答:1)第阶段弹性阶段阶段截面应力状态抗裂验算
2)第二阶段带裂缝工作阶段阶段截面应力状态作裂缝宽度变形验算
3)第三阶段破坏阶段时应力状态作构件承载力计算
3简述偏压破坏特征
答:偏心受压构件破坏特征受拉钢筋先屈服受压区混凝土压碎受压钢筋屈服塑性破坏破坏前明显预兆钢筋强度充分利偏压构件破坏特征受压区混凝土压碎受压钢筋屈服受拉钢筋受压受拉均未达屈服强度脆性破坏受拉钢筋强度充分利
4简述梁斜截面三种破坏形态破坏条件
答:梁斜截面三种破坏形态破坏条件:
1)剪跨较时剪跨适中配箍率时发生斜压破坏
2)剪跨较配箍率较时发生斜拉破坏
3)剪跨适中配箍率合适时发生剪压破坏
5受弯构件设计中什允许出现少筋梁超筋梁?
答:少筋梁破坏特征旦出现裂缝裂缝迅速开展构件宣告破坏超筋梁破坏特征受压区混凝土压碎时受拉钢筋尚未达屈服强度少筋超筋破坏均脆性破坏破坏前没预兆受弯构件设计中允许出现少筋梁超筋梁
6砌体房屋静力计算方案划分三种?规范划分静力计算方案?
答:房屋空间刚度房屋静力计算方案划分弹性方案刚性方案刚弹性方案便应规范屋盖(楼盖)类横墙间距划分静力计算方案
四计算题
1单筋矩形截面简支梁截面尺寸b×h250×500mm采C30砼HRB335级受力钢筋承受弯距设计值M250kN·m作已受拉区配置4根直径25mm钢筋(As1964mm2)试验算截面安全否
已知ρmin02ζb0550h0465mm
解:
1验算梁否会超筋
2验算梁否会少筋
会少筋梁
3计算梁承载力
22542KNm<M250KNm
梁截面安全
2某轴心受压柱截面尺寸b×h400mm×500mm柱承受轴力设计值N4000KN计算长度ι04m采C35砼HRB400级受力钢筋试校核柱否安全
已知:
8
10
12
10
098
095
提示:
解:
1计算柱长细
2查表柱稳定性系数
Ф098
计算NU
NU09×098×(167×400×500+360×1964)
3569KN<N4000KN
柱安全
3某单层食堂横墙间距S25m刚性方案H0H外墙承重33m开间21m窗洞墙高H42m墙厚370mm砂浆采M5试验算外墙高厚否满足求[β]24
答案:
外墙高厚满足求
请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄The battle for young viewers CCTV is embracing Internet culture and working with independent producers on TV shows to woo audiences under 35 Han Bing bin reports After charming audiences with his warm smile for 14 years China Central Television host Li Jiaming recently found himself targeted by a group of young netizens unhappy with his style The complaints came after Li hosted the premiere of Rising Star on Oct 31 It is a singing competition show that originated in Israel Many young netizens found his hosting style slow and boring and mocked it as CCTV evening gala style They even initiated an online campaign to replace him The 40yearold host's reaction to the criticism was surprising During the second episode he jokingly called himself the slow Jiaming and acted much younger talking faster and louder It's like selling a product When the customers file a complaint you must change says Li In the Internet age you get feedback very quickly These young people are so cute When you're willing to change for them they will quickly like you back In order to win more young viewers CCTV is relying on programs such as Rising Star to embrace Internet culture In Rising Star a studio audience and fans watching on television vote for their favorite singers in real time using the instantmessaging app WeChat Rising Star was designed to be a live broadcast but the Chinese version isn't because of policy reasons Still WeChat votes by viewers at home are still a major factor in determining which contestants advance to the next round In the show's latest episode more than 65 million votes were cast via WeChat Now the competition among entertainment shows is very fierce Audiences have more diverse needs CCTV needs to embrace an open attitude interact with young audiences and blend with the Internet says Lyu Yitao director of CCTV's entertainment channel The producer of Rising Star Enlight Media says the program will have a phenomenal effect given CCTV's audience base nationwide But it comes with a challenge says Zhang Hang chief producer of the program and CEO of Enlight Media's TV business Unlike topranking provincial satellite channels such as Hunan TV which have a large base of young fans thanks to a series of phenomenally popular entertainment and reality shows CCTV productions are usually more conservative and serious and thus have a much older audience base If we were to run this program on Hunan we may attract twice as many viewers says Zhang But since we didn't make it there we now have to make the best out of the given conditions And it means we have to make certain compromises When the current season of Rising Star ends Zhang says his company will conduct an overall evaluation of the program and make adjustments for future seasons Although audience ratings haven't lived up to Zhang's expectations he says the program has already helped CCTV attract more young people According to Enlight Media the number of people ages 15 to 35 who watched the first episode of Rising Star was 76 percent higher than the usual audience for CCTV entertainment productions In order to attract young audiences CCTV has been working with independent production companies As one of CCTV's closest partners Enlight Media has produced several entertainment and reality shows for the company's channels including the Chinese version of The Biggest Loser on CCTV's business channel and an original teenager talent show Shaonian Zhongguo-qiang (Strong Young Chinese) on CCTV1 This year CCTV also licensed EEMedia the producer of the popular Super Girl talent shows to produce the talk show Hi 2014 hosted by Taiwan pop star Harlem Yu and one of China's most popular TV stars Xie Na The show is geared toward younger audiences Canxing Productions which rose to fame with the success of its Voice of China series on Zhejiang TV also produced two talent shows for CCTV One is an original production called Songs of China which ended up as one of CCTV's most watched programs of 2014 The State Administration of Press Publication Radio Film and Television announced earlier this year that starting in 2015 only one music talent show can be aired nationwide during prime time each season and there can be only one program based on foreign formats each year However domestic media report that such policies don't apply to CCTV meaning it will become a highly desired platform by production companies Wang Changtian CEO of Enlight Media confirmed to the Shanghai Securities News that its programs scheduled to air on CCTV next year which include at least two reality shows won't be affected A kung futhemed reality show produced by Canxing is also reportedly scheduled to run on CCTV next year CCTV is very active The level of its acceptance of new ideas is even beyond my imagination says Zhang Hang Our cooperation with CCTV will surely continue When winter comes nothing is more relaxing than a hot spring bath For thousands of years natural mineralrich hot spring baths have also been used to relieve health ailments The water found in natural hot springs contains a variety of different minerals and the most common one is sulfur It has a rotten egg smell but is excellent for skin The sulfurcontaining water might be just what the doctor ordered when it comes to relieving pain stress itchy skin arthritis and more Hot springs resorts are thriving as biting cold winter arrives Here we take a look at some of the best natural hot springs China has to offer
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