综合精品_淫语对白_亚洲一线二线在线观看_自偷自拍av_女m被主人虐玩调教91_青草精品视频_一乃葵在线_村上里沙在线观看_国产精品刺激_日韩精品视频免费_国产又黄又猛又粗_3d蒂法精品啪啪一区二区免费_日韩一本在线_奇米精品一区二区三区四区_日本三级黄色录像

PDF全文閱讀

朱兆斌

 

（杭州鐵路設(shè)計(jì)院有限責(zé)任公司 ，浙江 杭州 310005)

摘   要 ：為研究交通荷載下 Kelvin 地基上混凝土路面的厚板動(dòng)力響應(yīng)規(guī)律，將混凝土路面板視為有限寬度的無限長厚板，將交通荷載視為混凝土路面上的矩形運(yùn)動(dòng)荷載，應(yīng)用層合板理論，采用三角級(jí)數(shù)與傅里葉變換， 得到運(yùn)動(dòng)荷載作用下混凝土路面厚板波數(shù)－頻率內(nèi)的響應(yīng)積分形式解，再利用傅里葉數(shù)值逆變換方法得到了路面板的撓度與內(nèi)力響應(yīng)。結(jié)果表明： 在荷載速度較小時(shí)，路面板的撓度和彎矩 、剪力在縱向上均呈對稱分布；隨著速度增加，縱向上的撓度與內(nèi)力分布開始變得不對稱， 同時(shí)撓度和彎矩 、剪力幅值不斷減小。荷載頻率對 路面板撓度和內(nèi)力的影響與荷載速度類似。此外， 當(dāng)運(yùn)動(dòng)荷載中心逐漸靠近寬度端部時(shí)，路面板內(nèi)部的響應(yīng)呈現(xiàn)先增大后減少的趨勢。

關(guān)鍵詞：交通荷載 ；Kelvin 地基 ；層合板理論 ；荷載速度 ；路面板撓度

中圖分類號(hào)：U416. 216           

文獻(xiàn)標(biāo)志碼：A           

文章編號(hào)： 1005- 8249   (2024)  06- 0124- 08

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.023

 

ZHU Zhaobin

(Hangzhou Railway Design Institute Co. ，Ltd. ，Hangzhou 310005 ,   China)

Abstract：To study the dynamic response law of thick pavement resting on the Kelvin foundation due to a moving load, the thick concrete pavement is modelled as an infinite laminated slab with finite width, the traffic load is modelled as a local rectangular uniform load on the pavement. Dynamic responses of the pavement due to the traffic load are first derived in the form of integral function based on the laminated plate theory, trigonometric series and Fourier transformation technique in the wavenumber and frequency domain. The response results of the pavement are finally obtained using numerical inverse Fourier transformation method. The results show that the distributions of pavement’s deflection, bending moment and shear force in the longitudinal direction are almost symmetric when load velocity is small. When the load velocity continues to increase, the distribution becomes asymmetric and the amplitudes of deflection, bending moment and shear force decrease continuously. The effect of load frequency on the dynamic response of pavement is similar to that of load velocity. Furthermore, when the center of traffic load approaches the end of pavement in the transverse direction, the dynamic response increases slightly at first and then rapidly reduces in the end.

Keywords :  traffic load;  Kelvin foundation;  laminated plate theory;  load velocity;  pavement deflection

作者簡介： 朱兆斌  (1977—) ,   男 ，本科 ， 高級(jí)工程師 ，研 究方向： 交通工程及地下工程研究與設(shè)計(jì)。

收稿日期：2023- 05- 10