条件同第5小题,且假定挡土墙重心离墙趾的水平距离x0=1.677m,挡土墙每延米自重G=257.4kN/m。已知每米长挡土墙底面的抵抗矩W=1.215m3,试问,其基础底面边缘的最大压力pkmax,与下列()项数值最为接近。
A. 134.69kPa
B. 143.76kPa
C. 157.83kPa
D. 166.41kPa
查看答案
当该柱采用网状配筋配置,钢筋为Φb4冷拔低碳钢丝,fy=430N/mm2,钢筋网竖向间距s=260mm(四皮砖),网格尺寸为60mm×60mm,已求得体积配筋率ρ=0.162,fn= 2.522N/mm2,该网状配筋柱承载力与()项数值最为接近。
A. 592.7kN
B. 513.5kN
C. 441.4kN
D. 491.1kN
某钢筋混凝土次梁,下部纵向钢筋配置为4Φ20,fy=360N/mm2,混凝土强度等级为C30,ft=1.43N/mm2,在施工现场检查时,发现某处采用绑扎搭接接头,其接头方式如下图所示。试问,钢筋最小搭接长度l1(mm),应与下列()项数值最为接近。
A. 846
B. 992
C. 1100
D. 1283
外周边框架底层某中柱,截面b×h=700mm×700mm,混凝土强度等级为C50 (fc=23.1N/mm2),内置Q345型钢(fa=295N/mm2),考虑地震作用组合的柱轴向压力设计值N=18000kN,剪跨比λ=2.5。试问,采用的型钢截面面积的最小值(mm2)应最接近于下列()项数值。
A. 14700
B. 19600
C. 45000
D. 53000
What does the last sentence in the 3rd paragraph mean according to the passage?
A. The patient is seriously iii because of lack of water in the well.
B. The patient can be saved if he has enough money to solve the financial problem.
C. It's too late for small business owners to realize the gravity of the problem because they have used up their money.
D. It's urgent for small business owners to pour all their money into the enterprise to revitalize their business.