Grid structure dismantling method

Abstract

A grid structure dismantling method is disclosed. The grid structure includes a plurality of rod member groups and a plurality of upright posts, the plurality of rod member groups include a first rod member group and a second rod member group, the first rod member group is connected to the second rod member group, and the plurality of upright post are connected to the second rod member group. The grid structure dismantling method includes: identifying a plurality of key rod member groups from the plurality of rod member groups, with each of the key rod member groups corresponding to a respective one of the upright posts; and dismantling all key rod members in each of the plurality of key rod member groups to make the grid structure collapse.

What is claimed is: 
     
         1 . A grid structure dismantling method, wherein the grid structure comprises a plurality of rod member groups and a plurality of upright posts, the plurality of rod member groups comprise a first rod member group and a second rod member group, the first rod member group is connected to the second rod member group, and each of the plurality of upright posts is connected to the second rod member group respectively; wherein the grid structure dismantling method comprises:
 identifying a plurality of key rod member groups from the plurality of rod member groups, with each of the plurality of key rod member groups corresponding to a respective one of the plurality of upright posts; and   dismantling all key rod members in each of the plurality of key rod member groups to make the grid structure collapse.   
     
     
         2 . The grid structure dismantling method of  claim 1 , wherein the identifying comprises: simulating and analyzing dismantling of the grid structure with finite element analysis software; and identifying each of the plurality of key rod member groups based on a stress change of at least one of non-dismantled rod members during a dismantling process. 
     
     
         3 . The grid structure dismantling method of  claim 2 , wherein the dismantling comprises making the grid structure completely collapse by repetitively:
 selecting two adjacent upright posts from the plurality of upright posts to be a first upright post and a second upright post, respectively; wherein the dismantling comprises:   dismantling all rod members of a key rod member group corresponding to the first upright post;   dismantling all rod members of a key rod member group corresponding to the second upright post, so that portions of the grid structure corresponding to the first upright post and the second upright post collapse.   
     
     
         4 . The grid structure dismantling method of  claim 3 , wherein the grid structure comprises a rectangular square pyramid grid structure, and the key rod member group corresponding to the second upright post comprises a first key rod member, a second key rod member, and a third key rod member. 
     
     
         5 . The grid structure dismantling method of  claim 4 , wherein the simulating comprises:
 a first round of simulation, in which, on a basis of dismantling all the rod members of the key rod member group corresponding to the first upright post, stress changes of the at least one of non-dismantled rod members of the second rod member group which is connected to the second upright post are successively simulated and analyzed after each single rod member of the second rod member group which is connected to the second upright post is dismantled, and after being dismantled, a rod member that results in a greatest stress change of the at least one of non-dismantled rod members of the second rod member group which is connected to the second upright post is determined as the first key rod member;   a second round of simulation, in which, on a basis of dismantling the first key rod member, stress changes of the at least one of non-dismantled rod members of the second rod member group which is connected to the second upright post are further successively simulated and analyzed after each single rod member of the second rod member group which is connected to the second upright post is dismantled, and after being dismantled, a rod member that results in a greatest stress change of the at least one of non-dismantled members of the second rod member group which is connected to the second upright post is determined as the second key rod member; and   repeating above simulating and analyzing processes until a portion of the grid structure collapses, thereby identifying all the key rod members included in the key rod member group corresponding to the second upright post.   
     
     
         6 . The grid structure dismantling method of  claim 1 , wherein the grid structure comprises a rectangular square pyramid grid structure, the second rod member group comprises a plurality of web rods, each of the plurality of upright posts is connected to a plurality of corresponding web rods which form a respective one of the key rod member group corresponding to the each of the plurality of upright posts. 
     
     
         7 . The grid structure dismantling method of  claim 1 , wherein the grid structure comprises a rectangular square pyramid grid structure, the second rod member group comprises a plurality of web rods, each of the plurality of upright posts is connected to a plurality of corresponding web rods which form a respective one of the key rod member group corresponding to the each of the plurality of upright posts, and the plurality of upright posts comprise a first upright post, a second upright post, and a third upright post; wherein the first upright post is adjacent to the second upright post, wherein the second upright post is adjacent to the third upright post; wherein the dismantling comprises:
 dismantling all corresponding web rods connected to the first upright post;   retaining at least one of corresponding web rods connected to the second upright post, and dismantling other web rods connected to the second upright post except the at least one of the corresponding web rods which is retained;   dismantling all corresponding web rods connected to the third upright post; and   dismantling at least one of the web rods retained at the second upright post.   
     
     
         8 . The grid structure dismantling method of  claim 1 , wherein the grid structure comprises a rectangular square pyramid grid structure, the second rod member group comprises a plurality of web rods, each of the plurality of upright posts is connected to a plurality of corresponding web rods which form a respective one of the key rod member group corresponding to the each of the plurality of upright posts, the plurality of upright posts comprise a first upright post, a second upright post, a third upright post, and a fourth upright post; and the first upright post, the second upright post, the third upright post and the fourth upright post are arranged in sequence at four corners of a rectangle; wherein the dismantling comprises:
 dismantling all corresponding web rods connected to the first upright post;   retaining at least one of corresponding web rods connected to the second upright post, and dismantling other web rods connected to the second upright post except the at least one of the corresponding web rods which is retained;   dismantling all corresponding web rods connected to the third upright post; and   dismantling all corresponding web rods connected to the fourth upright post.   
     
     
         9 . The grid structure dismantling method of  claim 1 , further comprising: breaking roof panels around the plurality of upright posts and around the plurality of rod member groups before dismantling the plurality of the key rod member groups. 
     
     
         10 . The grid structure dismantling method of  claim 1 , further comprising: preparing a lifting device to allow a person to be hoisted in air to dismantle the plurality of key rod member groups before dismantling the plurality of key rod member groups.