【正文】
s phenomenon is accuracy of the present solution is con_rmed by paring it with the modal superpositionsolution for the special case of a simply supported circular curved beam. Then, the proposedprocedure is applied to investigate the dynamic behaviour of circular curved beams subjected toa moving load, the magnitude of which is a function of time. Finally, for practical interests, the impact factors for displacement and internal reactions of circular curved beams are considering the ejects of the moving speed and the excitation frequency of the load, and theRadius of curvature, number of spans, span length, and damping of the curved beam.MATHEMATICAL FORMULATION AND SOLUTIONSA planar curved member is shown in Figure 1, in which the X and Zaxis is the principalCensorial axes of the beam section. The Saxis coincides with the censorial axis wi。 7] applied the modal to investigate the dynamic responses of a single, simply supported curved beam a moving load or moving mass, in which Lasso’s equation for thin walled beam [8] was and Wilson [9] conducted a laboratoryscale experiment to study the vibrations of curvedSpans for mass transit systems. Chug and Pinjarkar [10], Rabizadeh and Shore [11], and Schellinget al. [12] applied various types of _nite element formulations to analyze the dynamic responses of curved boxgirder bridges subjected to a moving load, while Huang et al. [13] solved for the case with transit vehicles simulated by sprung masses. Recently, Wilson et al. [14] employed normalmode method to analyze continuous curved are two main disadvantages of using the modal superposition (or normal mode) techniqueto solve the problems with a moving load. One is that the mode shapes and natural to be found _rest, which, in general, is not an easy task, especially for curved beams between the shear force and the moments and for multispan beams. The other is that force is not continuous at the loading point, and using _nite continuous modes to prescribeThis discontinuity results in Gibb39。 dynamic stones method moving load。附錄2An accurate solution for the responses of circular curvedbeams subjected to a moving loadSUMMARYIn this paper, an accurate and elective solution for a circular curved beam subjected to a moving load , which incorporates the dynamic stones matrix into the Lap lace transform technique. In the Lap , the dynamic stones matrix and equivalent nodal force vector for a moving load are based on the general closedform solution of the deferential equations for a circular curved to a moving load. A parison with the modal superposition solution for the case of a curved beam contras the high accuracy and applicability of the proposed solution. The at any desired location can easily be obtained with high accuracy using the proposed solution, large number of elements are usually required for using the _niter element method. Furthermore, the jumpBehaviors of the shear force due to passage of the load is clearly described by the present solution Gibb39。此外,在圖3中可以看出,無(wú)的現(xiàn)象觀察當(dāng)前解決剪力, 所以本辦法規(guī)定的反應(yīng)較為穩(wěn)定,在這種情況下為剪力。 (見(jiàn)圖3)。氮和L分別為方程(22)。用數(shù)字方式取得上市成果,也是在為態(tài)疊加欄解決。在這種情況下,相當(dāng)于一公里的速度v= 以下反應(yīng)結(jié)果:曲梁的幾何特性與平方截面審議結(jié)果如下: 住宅(曲率半徑)=五十米,開(kāi)角=細(xì)比=70。簡(jiǎn)單的方式支持零出平面位移美、捻角、彎矩的MZ。圖3。通常這不是一項(xiàng)容易取得方式除在特殊情況下曲梁與簡(jiǎn)支疆界。 這種算法是一個(gè)準(zhǔn)確的參數(shù):粘連(產(chǎn)品左旋和N),達(dá)峰,和A一般來(lái)說(shuō)通常應(yīng)該結(jié)構(gòu)將作粘連50、5000、并有5至10正如伊利諾[19]。亞南[21]查伊利諾優(yōu)勢(shì)的技術(shù)比其他計(jì)劃。拉普拉斯數(shù)值逆變換拉普拉斯數(shù)值逆變換技術(shù)研發(fā)伊利諾[19]這里通過(guò)。為了系統(tǒng)地編寫(xiě)程序解決類(lèi)似的解決方法,使姚元本人的方程:給予齊解方程式(11)從明定邊界條件。 (七)多次根方程式可能只發(fā)生在特殊情況下, 可以稍微改變?yōu)樽儞Q參數(shù)。和同解:同解假設(shè)為在以下形式解決:可以這樣表示:S是拉氏變換參數(shù)這是一個(gè)復(fù)雜的數(shù)目和集等于 , 在計(jì)算方程(2a)-(2c)假設(shè)零初始條件已適用。權(quán)證18%的粘性阻尼慣性載有關(guān)于Z軸、十極慣性矩,聚丙烯外部裝載。圖2. 正面位移和內(nèi)力的第n元素那里是電子楊氏模、剪切模[18]集體單位體積,截面積、3,4面積慣性矩的Z軸,極慣性矩十頁(yè)的外部載荷。 協(xié)調(diào)制度、積極進(jìn)行橫向彎梁內(nèi)力。 S三軸線與主軸軸線曲率半徑不斷的鋼筋邸粒方程管出平面運(yùn)動(dòng)平面曲線梁計(jì)算出平面位移美、彎曲旋轉(zhuǎn)、扭角作為[16][17]數(shù)學(xué)上的定義于求解。最后位移和內(nèi)部因素影響的反應(yīng)是圓曲梁值超常的。本辦法是準(zhǔn)確的解出特殊疊加態(tài)對(duì)簡(jiǎn)支梁的彎矩。內(nèi)部評(píng)估的基礎(chǔ)上,反應(yīng)在拉普拉斯域精確解十分準(zhǔn)確。為了避免這些弊端的方法和姚元法本文包含了一個(gè)程序,拉氏變換成動(dòng)態(tài)矩陣性病煩躁。此外,在每次一步中有哪些因素待定負(fù)荷將要進(jìn)入改造負(fù)荷相當(dāng)于該單元節(jié)點(diǎn)力。 [4]獻(xiàn)了傳統(tǒng)姚元解、楊、林[5]采用動(dòng)態(tài)冷凝技術(shù)提高自己制訂解決1997/195元電子存儲(chǔ)。另外就是不連續(xù)的剪力荷載點(diǎn) 1997/195連續(xù)處當(dāng)出現(xiàn)間斷的現(xiàn)象可用這種方式得出結(jié)果, [15]。 [14]受雇正常模式方法分析連續(xù)彎梁。 [13]對(duì)于解決過(guò)境車(chē)輛模擬嶄露頭角群眾。威爾遜[9]約瑟夫和進(jìn)行實(shí)驗(yàn)室規(guī)模的實(shí)驗(yàn)研究振動(dòng)弧形跨度為謝林等。[4]獻(xiàn)了傳統(tǒng)姚解、楊、林[5]采用動(dòng)態(tài)冷凝技術(shù)提高自己解決速度1997/195元電子存儲(chǔ)。大部分的研究工作就是直梁式問(wèn)題。關(guān)于這一主題的研究工作可追溯到19世紀(jì)[1]。 性病煩躁法動(dòng)態(tài)引言梁動(dòng)態(tài)響應(yīng)負(fù)荷是引起了人們很特別地關(guān)注。 移動(dòng)荷載。位移和內(nèi)部因素的影響反應(yīng)。內(nèi)部反應(yīng)在任何地點(diǎn)隨時(shí)可以取得預(yù)期的高精度利用提出的解決而大量分子往往利用1997/195元方法所需. 此外,跳板的行為剪力由于通過(guò)負(fù)荷顯然形容目前的未經(jīng)解決的現(xiàn)象,這是不能達(dá)到的態(tài)疊加解決方案。在拉普拉斯領(lǐng)域性動(dòng)態(tài)矩陣節(jié)點(diǎn)力向量,相當(dāng)于一個(gè)移動(dòng)荷載的基礎(chǔ)上,一般封閉形式的解方程邸粒圓形彎梁受移動(dòng)載荷。 黃曉明 ,2005:353610 ,1999:565711 . 人民交通出版社,:9310012 張起森 ,1999:6613 ,2001:666714《公路工程技術(shù)標(biāo)準(zhǔn)》(JTG B01—2003)15《公路路基設(shè)計(jì)規(guī)范》(JTG D30—2004)16《公路瀝青路面設(shè)計(jì)規(guī)范》(JTG F40—2004)17 ,2001劉黎萍 孫立軍 瀝青路面結(jié)構(gòu)設(shè)計(jì)中的壽命周期費(fèi)用分析,山東交通學(xué)院學(xué)報(bào)20021819 Chavez D. J. Mountain Biking : Direct, Indirect, and Bridge Building Management Styles. Journal of Park and Recreation Administration. Volume 14. 1996:2135.Chavez D. J., P. L. Winter, and J. M. Bass. Recreation20 Mountain Biking : A Management Perspective. Journal of Park and Recreation Administration. Volume :2936. ,2006:61628 ,:1721755 周亦唐 張維全 ,2005:29503參考文獻(xiàn)1兩年多來(lái),景教授不僅在學(xué)業(yè)上給我以精心指導(dǎo),同時(shí)還在思想、生活上給我以無(wú)微不至的關(guān)懷,在此謹(jǐn)向景老師致以誠(chéng)摯的謝意和崇高的敬意。深深地感染和激勵(lì)著我。致 謝本研究及學(xué)位論文是在景海河和楊海濤二位老師的親切關(guān)懷和悉心指導(dǎo)下完成的。限于時(shí)間和經(jīng)驗(yàn)等方面的原因,在設(shè)計(jì)中難免有不盡合理和完善之處,敬請(qǐng)指正。設(shè)計(jì)應(yīng)達(dá)到的技術(shù)要求為滿足實(shí)際施工要求,即所設(shè)計(jì)的內(nèi)容正確、可行。本設(shè)計(jì)的內(nèi)容全面地包含了交通土建專(zhuān)業(yè)所學(xué)知識(shí),是一次全面的設(shè)計(jì)演練。結(jié)構(gòu)設(shè)計(jì)考慮了便于施工,安全,經(jīng)濟(jì)合理等因素,具有較好的安全性,適用性及耐久性。本畢業(yè)設(shè)計(jì)課題為《東深高速公路K23+500~K27+000段施工圖設(shè)計(jì)》,要求對(duì)東深高速公路進(jìn)行路線、路基路面工程施工圖設(shè)計(jì)。本設(shè)計(jì)完全根據(jù)新規(guī)范進(jìn)行設(shè)計(jì)的,采用了當(dāng)今最前沿的設(shè)計(jì)方法。 論畢業(yè)設(shè)計(jì)是大學(xué)本科教學(xué)計(jì)劃中最后一個(gè)重要的教學(xué)環(huán)節(jié),是對(duì)自身綜合應(yīng)用所學(xué)的道路橋梁基礎(chǔ)理論的培養(yǎng),也是進(jìn)行道路橋梁工程設(shè)計(jì)或科學(xué)研究的綜合訓(xùn)練,是前面各個(gè)教學(xué)環(huán)節(jié)的繼續(xù)、深化和拓寬,是培養(yǎng)自身綜合素質(zhì)和工程實(shí)踐能力的重要階段。:其他工程幾沿線設(shè)施第二部分: 設(shè)備及工具、器具購(gòu)置費(fèi):路基工程第二項(xiàng)公路工程概算費(fèi)用有建筑安裝工程費(fèi),設(shè)備、工具、器具、及家具購(gòu)置費(fèi),工程建設(shè)其他費(fèi)用,