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。
Ductile Iron has a higher yield strength than cast steel 40k vs. 30k.
铸钢的屈服强度是30K，而球墨铸铁的屈服强度更高，达到40 K。
Ductile iron regularly produced by NIBCO has a tensile strength in excess of 60,000 pounds. Yield strength is in excess of 40,000 pounds.
通常由美国尼伯科生产的球墨铸铁的抗拉强度都超过60,000磅，屈服强度超过40,000磅。
Ductile iron regularly produced by NIBCO has a tensile strength in excess of 60,000 pounds. Yield strength is in excess of 40,000 pounds.
通常由美国尼伯科生产的球墨铸铁的抗拉强度都超过60,000磅，屈服强度超过40,000磅。
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