The Distinguish Of Tall And Erect Structure Stress Ground Under Wind Load Based On Blurred Mode Distinguish

High-rise tower structures are one kind of high structures, relatively small extent in cross section, lateral load mostly effect slightness configurations. High-rise tower structures such as transmission tower, mast and television tower etc are one kind of structure shape directly relating with the human lifeline, which are widely applied in the many fields of national economy construction. Due to the characteristic of its highness and flexibility, the structures are sensitive to the action of wind. Under the action of strong wind, it occurs to suffer from the collapse of structures. Fuzzy mode identification is a method using spot and non-damage equipment,getting structure internal information and analyzing all kinds characters of structure response,then acquiring the structures change due to damage and degeneration. How to monitor and diagnose the capability of a structure and predict the damage before the disaster is become a research issue now.The degree of difficulty of recognize of stress ground is ,owing to economy, the quantity of wind pressure sensor on the reality structure is very limited opposite to the all node on the roofing. In order to use few wind pressure sensor as far as possible, using blurred pattern distinguish is very important.This test base on the achievement at home and abroad, on the background of Hefei television tower, use large-scale limited unit software, get the strain and stress ground of structure on the different pulsation wind affect. On the basis of blurred pattern distinguish indirect principle, use the reality survey strain of limited few key pole to distinguish the whole structure corresponding stress field.1. research the mechanics model of Hefei TV tower, build three dimensions limited unit pole model, draw front six steps mode, get into the analysis of motive attribute.2. Assume Davenport's power manual density function to calculate every node wind load on the different pulsation wind effect, calculate every pole stress and strain. Derive calculate formula for equivalent node wind load. And calculate structure stress caused by pulsation wind stress.3. According to blurred mode distinguish indirect principle, use limited few key pole survey strain distinguish the whole structure stress ground.4.discuss the result of Hefei TV tower stress ground blurred mode identification, the result prove this test example could distinguish the high-rise stress ground effectively, it would provide count reference for stress ground of kinds of structures.The method this test adopt can recognize the stress ground of High-rise tower structureswhich is under the wind load. And it can well recognize the degree of wind only use few critical bar. Thereby get all the internal force of bar in the structure. So we can only dispose only few sensor to mentor the whole structure working state.