Research The Pedestrian Suspension Bridge Dynamic Characteristics Of Structure

Pedestrian suspension bridge design principle mainly borrowed from auto suspension bridge,comprehensive consideration is relatively small,also have great spanning capacity,appearance modelling beautiful and other characteristics,and its construction speed and good economy,the advantages of easy to adapt to all kinds of conditions.Its widely in our country main construction in the mountains and numerous scenic spots and the Midwest in the main reason is to think about economy,size and construction difficulty and the surrounding environment coordination,brings very much convenience for residents and visitors.This paper,based on the engineering example of two pedestrian suspension bridge,through the finite element program Midas modeling calculation and analysis.Prophase of the project is located two bridge modeling analysis and calculation,the design review,puts forward the relevant data,sorting out the monitoring report,the middle monitor at the scene of the projet implementation,to master didn't step needed parameters in actual construction data,and related data measurement,after the construction completion after finishing to build two new Bridges for compared with original design to,this kind of bridge is summarized in the construction andcontrol process should pay attention to the problem and the relevant measures.Through further for structure dynamic analysis,simulation pedestrians through the whole bridge,verify the structural vibration response and pedestrian comfort after through the construction site monitoring,to more deep understanding of pedestrian suspension bridge,which determine the thesis research direction.Because of our country has not yet been published formal specification for pedestrian suspension bridge construction so far,most of the construction of pedestrian suspension bridge is usually a bridge engineer according to their own experience and explore to set up,at this stage of its main theoretical research from the dealership suspension bridge,the construction process is also a reference to the car suspension bridge construction scheme to implement,its main consideration and reduces the vehicle dynamic load of impact coefficient and windward side is far less than the car suspension bridge,is the pedestrian moving load increases,the pedestrians through the whole bridge on the structure vibration response and feedback to the pedestrian comfort,through the analysis of the theory of finite element modelingIntroduces the comfort level specification for each country and basic information and data modeling,simulation in two ways(one pedestrians and three columns pedestrians)pedestrian loads,each kind of pedestrian load mode in horizontal and vertical force f,achieved through the pedestrian bridge deck different time of a particle to simulate pedestrian moving load to the structure of the incentive effect,analyzes the structure of its vibration mode and pedestrians with different frequency through the whole bridge,it is concluded that the vibration response of structure,according to the national standard to judge your comfort level;Under various conditions of structure vibration acceleration is very small,but the horizontal displacement and vertical displacement value of relatively large,which can be considered horizontal,vertical displacement and torsion separately formulate comfort requirements.This paper also introduces the structure of the change itself various wind resistance measures of vibration mode,according to choose the wind vibration response analysis measures of economy.