推倒一堵墙所需要的力和功  

On the force and work needed to push down a wall

作　　者：邵云 陶强 SHAO Yun;TAO Qiang(School of Electronic Engineering,Nanjing Xiaozhuang University,Nanjing 211171,China;Nanjing Shangyuan Middle School,Nanjing 211100,China)

机构地区：[1]南京晓庄学院电子工程学院,江苏南京211171 [2]南京市上元中学,江苏南京211100

出　　处：《高师理科学刊》2022年第1期34-38,54,共6页Journal of Science of Teachers＇College and University

基　　金：江苏省教育科学“十三五”规划课题(D/2020/01/55)。

摘　　要：在不考虑墙根附着应力的前提下,对推倒一堵实心刚体砖墙所需要的力和功进行了研究,得到了2个结论:当水平外力作用于墙面中心时,推倒该堵墙所需要的外力将是一个与墙高无关的常量;而推倒2m以上的砖墙所需要做的功也几乎一样,为一很有限的常量.从功的角度看,高墙并不难推倒;而从风力的角度看,墙越高,则越容易推倒.在考虑到墙根附着应力的前提下,研究发现,应力仅对推倒4 m以下质量良好的矮墙所需要的推力产生一定的影响.Without considering the adhesive stress of the wall root,studies the force and work required to push down a solid rigid brick wall,and obtains two unexpected conclusions,when the horizontal external force acts on the center of the wall,the external force required to push down the wall will be a constant independent of the wall height.The work required to push down the brick wall more than 2 m is almost the same,which is a very limited constant.From the point of view of work,it is not difficult to push down the high wall.From the point of view of wind,the higher the wall,the easier it is to pull down.Considering the adhesive stress of the wall root,it is found that the stress only has a certain effect on the thrust required to push down the low wall with good quality less than 4 m.

关 键 词：墙高 极限功 风力 风速 应力 

分 类 号：O312.2[理学—一般力学与力学基础]