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相同条件下,砌体的沿齿缝弯曲抗拉强度与沿通缝弯曲抗拉强度相比()

发布日期:2021-03-23

相同条件下,砌体的沿齿缝弯曲抗拉强度与沿通缝弯曲抗拉强度相比()
A

一样大;

B

无法确定;

C

后者大;

D

前者大。

试题解析

抗拉强度

抗拉强度(tensile strength),物理学术语,是金属由均匀塑性形变向局部集中塑性变形过渡的临界值,也是金属在静拉伸条件下的最大承载能力。抗拉强度即表征材料最大均匀塑性变形的抗力,拉伸试样在承受最大拉应力之前,变形是均匀一致的,但超出之后,金属开始出现缩颈现象,即产生集中变形;对于没有(或很小)均匀塑性变形的脆性材料,它反映了材料的断裂抗力。符号为Rm(GB/T 228-1987旧国标规定抗拉强度符号为σb),单位为MPa。

中文名
抗拉强度
本质
材料最大均匀塑性变形的抗力
符号
Rm
外文名
tensile strength
反应
材料的断裂抗力
单位
MPa

块材墙

块材墙是用砂浆等胶结材料将砖石块材等组砌而成,如砖墙、石墙及各种砌块墙等, 也可以简称为砌体。一般情况下,块材墙具有一定的保温、隔热、隔声性能和承载能力, 生产制造及施工操作简单,不需要大型的施工设备,但是现场湿作业较多、施工速度慢、 劳动强度较大。

中文名
块材墙
材料
砂浆等胶结材料、砖石块材
简称
砌体
功能
保温、隔热、隔声性能和承载能力

弯曲

弯曲,即不直。可以分为形变弯曲及空间弯曲。

中文名
弯曲
所属学科
物理学

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