Research On Seismic Performance Of The Long-cantilever Space Steel Truss Structure

The long-cantilever space steel truss structure can satisfy the modern stadiumawning architectural aesthetics requirements of light and beautiful, modeling novel,so becoming more and more popular in practical engineering applications. While suchstructure design must be considered a variety of load effect, complicated structure,especially in high intensity area, the earthquake response factors are more difficult tograsp, combined with the stadium awning is more and more important position inmodern life, So strengthen the seismic performance study of the long-cantilever spacesteel truss structure is particularly urgent.In this paper, Based on the certain city central stadium awning project in Henanprovince as the research object, With the finite element analysis software MIDAS,adopt different seismic analysis method for seismic response of the long-cantileverspace steel truss structure carried on the thorough analysis, specific as follows:1. Analysis the natural vibration characteristic of the long-cantilever space steeltruss structure. In this paper, based on introduce the dynamic characteristics under thepremise of theory and engineering background briefly, using the finite elementsoftware MIDAS established the long-cantilever space steel truss finite elementmodel, and first carry on the static characteristic analysis, to determine the rationalityof the design of the structure member, study the characteristics of the static response.On this basis, analysis the modal, get the natural vibration characteristic of thestructure. In order to study the influence factors of structural natural vibrationcharacteristics further, change the related parameters of the structure model, such ascantilever length, leg height, constraints between commons, through the in-depthcomparative analysis, serve as a reference for the further study of this kind ofstructure.2. Analysis the integrity of the long-cantilever space steel truss structure.According to structure characteristic, selected the single structure, three-commonstructure and the overall structure of the analysis model, under the action of the static and the displacement and internal force response analysis under seismic action,at the same time, study the different structure of the natural vibration characteristics,for the structural design, put forward some useful suggestions.3. Analysis the seismic response of the long-cantilever space steel truss structure.Using the modal decomposition response spectrum method and dynamic time historyanalysis method respectively, analysis the seismic response of the structure, mainlyconsidering the vertical seismic action on the internal force responses anddisplacement response of the structure influence, Comparative analysis the action ofhorizontal earthquake and horizontal+vertical seismic action, and two methods ofseismic analysis results contrast research, summarizes some characteristics of thedynamic response of this structure, provides reference for similar structure design andresearch.