【简答题】某两层钢筋混凝土框架结构,横梁刚度无穷大。第一层楼盖标高处集中质量m1= 60t,第二层楼盖标高处集中质量m2= 50t,每层层高均为4m。结构自振周期T1= 0.358s,T2= 0.156s;主振型为{ X11,X12}T ={ 0.488,1}T,{ X21,X22}T ={-1.710,1}T。特征周期Tg= 0.25s,多遇地震水平地震影响系数最大值amax=0.16,阻尼比为0.05。...
【单选题】某二层钢筋混凝土框架结构,高度均为4.5m,框架梁刚度EI=∞,建筑场地类别为III类,抗震烈度8度,设计地震分组第一组,设计地震基本加速度0.2g,阻尼比ζ=0.05。 已知第一、二振型周期T1=1s,T2=0.35s,在多遇地震作用下对应第一、二振型地震影响系数α1,α2与下列何项最接近?
【简答题】某两层钢筋混凝土框架结构,横梁刚度无穷大。第一层楼盖标高处集中质量m1= 70t,第二层楼盖标高处集中质量m2= 55t,每层层高均为4m。结构自振周期T1= 0.378s,T2= 0.167s;主振型为{ X11,X12}T ={ 0.494,1}T,{ X21,X22}T ={1.589,-1}T。特征周期Tg= 0.35s,多遇地震水平地震影响系数最大值amax=0.24,阻尼比为0.05。...
【单选题】2019年8月22日—27日,第45届世界技能大赛上中国代表团再次位列金牌榜、奖牌榜、团体总分第一,获得的金牌数量多少枚?
【单选题】(2)罕遇地震下,第一振型地震影响系数为( )
【单选题】According to the news, most poor people cannot do all of the following EXCEPT ______.
B.
feeding their families.
C.
buying enough necessities.
【简答题】Do you agree or disagree with the following statement? It is better to be a member of a group than to be the leader of a group. Use specific reasons and examples to support your answer.
【单选题】Which of the following is not true according to the text?
A.
Network entertainment is a huge and growing industry.
B.
It may not be possible for you to select any movie or television program ever made.
C.
The killer application is video on demand,
D.
You may play a role in new films in the future.
【判断题】土的原位测试是指在工程地质勘察现场,在可以扰动土层的情况下对土层进行测试
【简答题】某两层钢筋混凝土框架结构,横梁刚度无穷大。第一层楼盖标高处集中质量m1= 80t,第二层楼盖标高处集中质量m2= 60t,每层层高均为4m。结构自振周期T1= 0.378s,T2= 0.167s;主振型为{ X11,X12}T ={ 0.494,1}T,{ X21,X22}T ={1.589,-1}T。特征周期Tg= 0.35s,多遇地震水平地震影响系数最大值amax=0.24,阻尼比为0.05。...