發(fā)布時(shí)間：2018-04-18 17:44

  本文選題：自錨式懸索橋 + 空間主纜��； 參考：《長(zhǎng)沙理工大學(xué)》2014年碩士論文

【摘要】：空間自錨式懸索橋空纜狀態(tài)的主纜在自重作用下處于豎直平面內(nèi),成橋狀態(tài)主纜受到只有橫向傾角吊索的張拉力作用而成為空間主纜。在主纜線形由平面到空間的轉(zhuǎn)化過程中,主纜受鞍座、索夾等的約束和吊桿力的作用,兩鞍座間主纜將產(chǎn)生一定的扭轉(zhuǎn)。本文在國(guó)家自然科學(xué)基金項(xiàng)目“空間主纜懸索橋自適應(yīng)的構(gòu)形與效應(yīng)協(xié)調(diào)控制的理論與方法”的資助下,以杭州江東大橋主橋?yàn)楣こ瘫尘?采用ANSYS有限元模型和實(shí)體空間主纜模型試驗(yàn)相結(jié)合的方法,對(duì)平行鋼絲主纜由平面狀態(tài)向空間狀態(tài)轉(zhuǎn)換過程的主纜截面扭轉(zhuǎn)特性進(jìn)行了研究。主要工作成果如下：(1)試驗(yàn)方案的確定。在綜合考慮經(jīng)濟(jì)性、模型材料、制作工藝以及實(shí)驗(yàn)室條件等的基礎(chǔ)上,利用幾何相似比原理,確定試驗(yàn)?zāi)Ｐ偷膸缀慰s尺比為1：15,并對(duì)試驗(yàn)?zāi)Ｐ椭械年P(guān)鍵構(gòu)件進(jìn)行了設(shè)計(jì)制作,制定了試驗(yàn)的設(shè)計(jì)工況和加載方案。(2)試驗(yàn)處理方法的研究。通過量測(cè)加載前后關(guān)鍵點(diǎn)位上三測(cè)點(diǎn)蒼蠅拍子的空間坐標(biāo),利用幾何位置與扭轉(zhuǎn)角的關(guān)系,計(jì)算平行鋼絲主纜在任意空間角度下的線形和截面扭轉(zhuǎn)角。(3)主纜截面扭轉(zhuǎn)角的理論研究。分析了吊桿傾斜角的大小和主纜抗扭轉(zhuǎn)剛度值的選取這兩個(gè)方面對(duì)平行鋼絲主纜扭轉(zhuǎn)角的影響,并對(duì)主纜集束體抗扭剛度的取值范圍和影響因素進(jìn)行了分析,通過建立平行鋼絲主纜扭轉(zhuǎn)計(jì)算的ANSYS有限元模型,對(duì)主纜截面扭轉(zhuǎn)角的變化規(guī)律進(jìn)行了研究。(4)主纜截面扭轉(zhuǎn)角的實(shí)測(cè)數(shù)據(jù)分析。通過量測(cè)主纜關(guān)鍵點(diǎn)位在各工況下的主纜截面扭轉(zhuǎn)角,分析在索夾的安裝情況和主纜抗扭剛度保持不變的情況下,吊桿力的大小和吊桿橫橋向與鉛垂線的夾角等因素的改變對(duì)主纜截面扭轉(zhuǎn)角的影響,并根據(jù)模型試驗(yàn)結(jié)論提出了對(duì)施工控制的建議。(5)主纜截面扭轉(zhuǎn)角的理論計(jì)算結(jié)果與實(shí)測(cè)結(jié)果對(duì)比分析。將理論計(jì)算結(jié)果與實(shí)測(cè)數(shù)據(jù)進(jìn)行比較,結(jié)合實(shí)際情況分析產(chǎn)生誤差的原因,研究平行鋼絲主纜的扭轉(zhuǎn)特性。上述研究,為實(shí)際施工控制的指導(dǎo)和空間主纜扭轉(zhuǎn)特性理論與方法的建立提供了一定的參考價(jià)值。
[Abstract]:The main cable of the space self-anchored suspension bridge is in the vertical plane under the action of self-weight, and the main cable in the state of the bridge becomes the main cable of the space by the tension of only the transverse slanting slings.In the process of transforming the main cable form from plane to space, the main cable is restrained by saddle, cable clip and the force of suspender, and the main cable between the two saddles will produce a certain torsion.Supported by the National Natural Science Foundation of China "Theory and method of coordinated configuration and effect Control of Space main Cable suspension Bridge", this paper takes the main bridge of Jiangdong Bridge in Hangzhou as the engineering background.Based on ANSYS finite element model and solid space main cable model test, the torsional characteristics of the main cable section in the process of transition from plane state to spatial state of parallel steel wire main cable are studied.The main work results are as follows: 1) determination of the test plan.On the basis of comprehensive consideration of economy, model material, manufacturing process and laboratory conditions, the geometric scale ratio of the test model is determined to be 1: 15 by using the principle of geometric similarity ratio, and the key components in the test model are designed and manufactured.The design condition and loading scheme of the test are established.The space coordinates of the fly racket at the three measuring points on the key points before and after loading are measured in excess, and the relationship between the geometric position and the torsion angle is used.A theoretical study on the calculation of the torsional angle of the main cable section of parallel steel wire at any space angle and the torsional angle of the cross section of the main cable.In this paper, the influence of the angle of slant and the selection of the torsional stiffness of the main cable on the torsion angle of parallel steel wire main cable is analyzed, and the range and influencing factors of the torsional stiffness of the main cable cluster are analyzed.By establishing the ANSYS finite element model for calculating the torsion of parallel steel wire main cable, the variation law of the torsional angle of the main cable cross-section is studied and the measured data of the torsional angle of the main cable section are analyzed.The torsion angle of the main cable cross section at the key points of the main cable under various working conditions is measured in excess. The analysis is made on the condition that the installation of the cable clamp and the torsional stiffness of the main cable remain unchanged.The influence of the force of the suspension rod and the angle between the transverse bridge of the suspension rod and the lead vertical line on the torsional angle of the main cable section,According to the conclusion of the model test, the theoretical calculation results of the torsion angle of the main cable section and the measured results are compared and analyzed.The torsional characteristics of the main cable of parallel steel wire are studied by comparing the theoretical results with the measured data and analyzing the causes of the errors in combination with the actual situation.The above research provides a certain reference value for the guidance of practical construction control and the establishment of torsional characteristic theory and method of space main cable.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.25

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本文編號(hào)：1769398