某矩形基础在地震作用效应标准组合时偏心荷载530kN，偏心距0.31，基础尺寸3m×2m，基础埋深2.0m，持力层为中密细砂，经深度修正后地基承载力特征值fa=130kPa，验算地基承载力是否满足要求。（）
A.满足
B.不满足
C.无法确定
参考答案：A
解析：
M=530×0.31=164.3kN·m
faE=ξa×fa=1.3×130=169kPa
PK=128.3kPa＜faE=169kPa，满足
Pmax=183.1kPa＜1.2faE=1.2×169=202.8kPa，满足。
[点评] 根据《建筑抗震设计规范》(GB 50011—2001)，地基承载力考虑抗地震作用时，可将承载力特征值乘以调整系数ξa，由表4.2.3，对于中密细砂ξa=1.3。
先阅读短文，掌握其大意。然后从方框所给的词中选出恰当的10个，并用其适当形式填空，每个词限用一次。（每小题1分）
Near the trees there are four men. Now they are playing 小题4:_____________. The man with glasses is watching them. Look! A young man is 小题5:_____________ around the lake. Some young women are sitting at a 小题6:______________. They are drinking tea and 小题7:______________. Three girls are taking 小题8:_____________ near the lake. There are three 小题9: ___________ on the lake. Some children are in them. Are there any young men in the lake? Let me see. Oh, yes, there are. They are 小题10:___________ in the lake. |