本文選題：橋梁工程 + 非線性行為��； 參考：《公路交通科技》2014年05期

【摘要】：蝶形拱橋造型獨(dú)特其主梁部分的非線性行為規(guī)律相對(duì)其他拱橋較為難掌握,傳統(tǒng)未充分考慮非線性影響的設(shè)計(jì)方法已不再適用。在自編程序的基礎(chǔ)上,全面分析了各種非線性因素下蝶形拱橋主梁部分的非線性行為并研究了外傾角、矢跨比、含鋼率等設(shè)計(jì)參數(shù)的影響及規(guī)律。結(jié)果表明:拱肋單元的梁柱效應(yīng)對(duì)主梁彎矩的影響是不利的,而主梁?jiǎn)卧牧褐?yīng)能夠有效地抵消這種不利影響;主梁彎矩的非線性行為規(guī)律相對(duì)撓度更加復(fù)雜;未加載側(cè)邊梁的影響系數(shù)受偏載距離的影響較大;各梁跨中撓度和彎矩的影響系數(shù)均隨主拱肋外傾角的增大而增大;主拱肋含鋼率和索拱平面間夾角對(duì)主梁非線性行為的影響可以忽略。
[Abstract]:Compared with other arch bridges, the nonlinear behavior of the main beam of butterfly arch bridge is difficult to master, and the traditional design method, which does not fully consider the nonlinear influence, is no longer applicable. Based on the self-compiled program, the nonlinear behavior of the main girder of the butterfly arch bridge under various nonlinear factors is comprehensively analyzed, and the influence and regularity of the design parameters such as the inclination angle, the rise-span ratio and the steel ratio are studied. The results show that the Liang Zhu effect of arch rib element is unfavorable to the moment of the main beam, but the Liang Zhu effect of the main beam element can effectively counteract the adverse effect, and the nonlinear behavior law of the main beam moment is more complex than that of the deflection. The influence coefficient of unloaded lateral beam is greatly affected by offset distance, and the influence coefficient of deflection and bending moment of each beam is increased with the increase of the inclination angle of the main arch rib. The influence of the steel content of the main arch rib and the angle between the plane of cable arch on the nonlinear behavior of the main beam can be neglected.
【作者單位】： 中鐵大橋勘測(cè)設(shè)計(jì)院集團(tuán)有限公司;四川巴陜高速公路有限責(zé)任公司;交通運(yùn)輸部公路科學(xué)研究院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51138007) 國(guó)家科技支撐計(jì)劃項(xiàng)目(2011BAJ09B02)
【分類號(hào)】：U448.22

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相關(guān)期刊論文 前8條

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本文編號(hào)：1881597