It is found that the ductile strengthen member (concrete fill steel tube) play an important role to prevent the structure from collapse after the shear walls partially yield.
结果表明，混凝土芯筒的剪力墙屈服后，其内置的延性加强构件(钢管柱)对结构的防倒塌有显著的作用。
2
Ductile Iron has a higher yield strength than cast steel 40k vs. 30k.
铸钢的屈服强度是30 K，而球墨铸铁的屈服强度更高，达到40 K。
3
Ductile iron has yield strength of 40k and cast iron has none.