英语翻译For structures that require flexural strength for resist

英语翻译
For structures that require flexural strength for resistance to bending mo-
ments,reinforcing steel--rebar--is embedded in the concrete.In some cases,
tensioned cables are placed in the concrete to make prestressed or post-tensioned
concrete.The tension to resist the bending moment comes from the reinforcing
steel or the stressed cables.
For a concrete mix to reach its ultimate strength,a long period of time is
needed.The ultimate strength of concrete and its 28-day strength are not the
same.For design purposes,engineers use the 28-day strength,and the concrete
should be subjected to only minimum loads until the 28 days have passed.That
rule is very rigidly enforced in heavy construction.It is not at all uncommon for
work in residential and medium-rise commercial building construction to be pro-
cessed on a 3-day floor cycle.Place concrete one day,form and shore the next
floor over the next two days,this puts minimum load on the new slab,and then
place concrete on the third day.This placement increases the load on the previ-
ously placed floor,but the load is carried primarily by the shoring,which pas-
ses continually down for several floors,thereby shifting the load to concrete that
has had time to reach its ultimate strength.Note the shoring and reshoring in
Fig.6.5 is in place to a depth of four floors below the slab that is currently be-
ing placed.
（ultimate strength of
concrete
The compressive
strength of concrete
continues to increase
slowly for many
months.The ultimate
strength may be higher
than the 28-day
strength,which is
used for design
calculations.）

结构需要的抗弯强度抗弯曲模-
ments ,钢筋-钢筋-是嵌入在混凝土中.在某些情况下,
张电缆被放置在混凝土,使预应力或后张法
具体的建议.的紧张局势,抵御弯矩来自加强
钢,或强调的电缆.
为混凝土配合比,以达到其极限强度,一段很长的时间是
需要.最终混凝土强度和其28天的实力都不是
相同的.为设计目的,工程师使用28天的强度,以及混凝土
应受,只有最低负荷,直到28天已经过去了.那个
法治是非常硬性强迫在重型建筑.这不是在所有罕见
工作在住宅中多层商业建筑要亲
cessed在一个为期3天的楼周期.混凝土一天,形式和岸上未来
楼在未来两天内,这使得最小负载就新的板坯,然后
具体就第三天.此排名增加了负荷对previ -
ously放在地下,但负载进行主要由支护,运输局首席助理局长-
经济局局长不断下降几个楼层,从而转移负荷,以混凝土
有时间来达到其极限强度.注意支护和reshoring在
图.6.5是在地方,深度的四层楼以下的板是目前被-
荷兰放置.
（极限强度
混凝土
压缩
混凝土强度
继续增加
慢慢地很多
个月.最终
强度可能更高
超过28天
实力,这是
用于设计
计算） .
请楼主参考.