Why accouting sometimes said to be the language of finance?
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Why is limited liability such an important aspect to investors?
What general factors may influence the decision of whether to organize as a sole proprietorship, a partnership, or a corporation?
后张法预应力均采用()钢绞线,()钢绞线仅用于先张法构件
A. 1X7,1X3
B. 1X8,1X4
C. 1X7,1X4
D. 1X8,1X3
下列说法错误的是?
A. 松驰率与时间的关系:应力松弛初期发展较快,以后逐渐减慢。钢丝应力松弛损失率与时间t有较好的对数线性关系。
B. :松驰率与钢种的关系:钢丝和钢绞线的应力松弛率比热处理钢筋和精轧螺纹钢筋小。
C. 松驰率与初应力的关系:初应力大,松弛损失也大。当σi>0.7σb时,松弛损失率明显增大。
D. 松驰率与温度的关系:随着温度的升高,松弛损失率急剧增加。根据国外试验资料,400C时1000h松弛损失率约为200C时的1.5倍。
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