Study On Static And Dynamic Detection And Evaluation Methods Of Bearing Capacity Of Oblique Plate Beam Bridge

Inclined beam bridge not only can improve the road line form and the orientation city street conditions, make the whole circuit flowing freely, but also because the inclined beam bridge fixs to set up to make circuit and bridges grow shorten, thus economical use the ground, material and investment, raise the economic performance.Therefore, along with the quick development of the high grade highway and city stereoscopic transportation, the inclined beam bridge were signed to hand over the engineering in the high grade highway and city by the extensive application in.The inclined plank( beam) bridges are usually concrete .The common material used in concrete bridges construction is a kind of compound material which takes the cement sand syrup as the corpus, and the aggregate as the reinforced material.While modeling,for there always exests the interiorly tiny crevice, tiny crack,the concrete material present a state of sparse distribution and microcrack dispersion.Carrying the lotus function outside the environment factor and under, the bridge structure,especially under the lotus function over a long period of time ,make internal and original blemish of concrete expand, and become macroscopic crack of the certain size.This will make concrete of strength, just the degree descend, even breaking.Therefore, to the harm examination and the loading ability valuations that the inclined plank( beam) bridge carries on science, understand the actual condition of the current and inclined plank( beam) bridge well, can provide the basis with the existing bridge for the economic dependable land utilization, avoid the occurrence of the disaster trouble.According to inspect the income data the cultural heritage and the union machines that can checks, the research of abroad to inclined beam bridge is also not enough mature, and time across the degree very greatly, the earliest research can trace back to till 1948.And till now, also did not stagnate to the research of the inclined beam bridge.But for all that, also have no on the history at some expect to appear to study the high tide at that time.There are several method in the inclined beam bridge designing theories and methods as following,1, methods in experiment2, numerical analytic method3, the method that the positive bridge theories revise4, statistical methodThe research of our country to inclined bridge mainly is a last century 80's later of affair, can induce to the research of the inclined bridge the following what time:1, there are few research institutes2, dispersion of research power.Similar to the circumstance of the abroad, the domestic also did not appear the high tide of study the inclined bridge in somely at that time expect.3, The range of research is very narrow.The lotus carries the horizontal research for distribute big part is with revise the positive bridge lotus to carry horizontal distribute to compute method for lord.4, Study and actual become disjointed.Even in the inclined plank beam bridge, the theories analyzes the calculating and anti- dint to distribute is hard with actual circumstance to fit together, this is to say, the conditional processing of boundary is far not satisfied.In the field of the examination and the of the evaluation of loading abilities of the plank beam bridge, there are few documents to read.Zhou Lu,Guan Guodong and Xie Yanping adoption plank hull unit to a 45°of inclined hand over a box of beam bridge to carry on the calculation analysis, study inclined hand over the bridge with positive the bridge calms down to carry the on trial different characteristics, putting forward inclined hand over the bridge to calm down to carry to experiment the reasonable to add to carry the vehicle to arrange the method, combine current inclined hand over the bridge design in in common use simplification calculate way, the engineering examine personnel can compare to handle expediently inclined hand over the bridge calm down carry experiment calculation analysis problemThis text introduced first inclined hand over the dead load of the plank beam bridge to add to carry the project to really settle the method;Introduced immediately after at experiment the lotus to carry the function under, inclined hand over the calculation method and environments of the plank beam bridge mechanics parameter( measure to order of should the dint, move) to encourage the mold态parameter withdraws the method;End, make use of the above-mentioned method to round the high-speed k39 of city to the long spring inclined handed over the plank beam bridge to carry on the examination and load the ability to assess, this text mainly openned the exhibition following research work.Fasten the theories according to the beam, the adoption dint method calculation the lotus carries horizontal to distribute, adopting the list to across inclined prop up the beam ESS mode to compute the single beam of inside dint, thus made sure inclined hand over the quiet dint of the plank beam bridge to add to carry the position.The space method of adopt the space beam compute inclined hand over the plank beam bridge at experiment the lotus carries the function under of quiet mechanics parameter( measure of the point to move, should dint), the dynamics parameter( flap the type, frequency).Introduce the extraction method of modal parameter when inclined plank beam bridge is under environment stimulation.According to the above-mentioned method assurance the Liaocheng Expressway Circling City k39 inclined plank beam bridge of dead load and carrying the position and motives to experiment the project, Liaocheng Expressway Circling City k39 inclined plank beam bridge to carry on dead,live load examination, carried on the loading ability to assess to this bridge according to the examination data.