發(fā)布時間：2018-05-13 21:16

  本文選題：多塔斜拉橋 + 汽車荷載響應(yīng)　； 參考：《同濟大學(xué)學(xué)報(自然科學(xué)版)》2014年01期

【摘要】：結(jié)合車輛荷載研究技術(shù),以三塔斜拉橋為例,分析了該結(jié)構(gòu)在隨機車流作用下的總體荷載響應(yīng)特性,深入研究了實際汽車荷載響應(yīng)與規(guī)范荷載模型計算值差別,探討了車流隨機特性參數(shù)對結(jié)構(gòu)響應(yīng)特性影響.結(jié)果表明:我國《公路橋涵設(shè)計通用規(guī)范》(JTG D60—2004)的汽車荷載模型對多塔斜拉橋估計過高,交通運營狀態(tài)和日均交通量、重車混入率交通特性等參數(shù)對汽車荷載響應(yīng)影響顯著,對不平衡加載敏感不同的效應(yīng)顯示出對隨機車流不同的響應(yīng)特性.說明現(xiàn)有規(guī)范基于影響面確定加載范圍的極端加載方式及荷載取值無法反映多塔斜拉橋的實際汽車荷載響應(yīng)狀況,建立反映實際狀況的荷載模型可考慮引入多參數(shù)多級別的性能設(shè)計思想.
[Abstract]:Combined with vehicle load research technology, taking three-tower cable-stayed bridge as an example, the overall load response characteristics of the structure under the action of random traffic flow are analyzed, and the difference between the actual vehicle load response and the calculated value of the code load model is deeply studied. The influence of the random characteristic parameters of the vehicle flow on the response characteristics of the structure is discussed. The results show that the vehicle load model of JTG D60-2004) has a significant effect on vehicle load response, such as the overestimation of multi-tower cable-stayed bridge, the traffic operation state and daily average traffic volume, the traffic characteristics of heavy vehicle mixing rate, and so on. Different effects sensitive to unbalanced loading show different response characteristics to random traffic flow. It shows that the extreme loading mode and load value of the existing code based on the influence surface can not reflect the actual vehicle load response of multi-tower cable-stayed bridge. The multi-parameter and multi-level performance design idea can be taken into account in the load model which reflects the actual situation.
【作者單位】： 同濟大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金(51108338)
【分類號】：U448.27;U441.2

【參考文獻】

相關(guān)期刊論文 前3條

1 樓莊鴻;多孔斜拉橋[J];公路交通科技;2002年02期

2 阮欣;周小q，

本文編號：1884830