本文選題：懸索橋 + 主纜��； 參考：《長(zhǎng)安大學(xué)》2014年碩士論文

【摘要】：近年來(lái)隨著大跨徑懸索橋在我國(guó)的蓬勃發(fā)展，該橋型越來(lái)越受到工程界的重視和青睞。懸索橋主要由主纜、主塔、加勁梁及吊索等結(jié)構(gòu)組成，其中主要結(jié)構(gòu)受拉、材料利用效率較高。主纜材料常采用高強(qiáng)鋼絲，比起其他材料更能經(jīng)濟(jì)合理地適用于修建大跨徑橋梁。通�？紤]大跨徑懸索橋柔性較高的特點(diǎn)，其線形易受現(xiàn)場(chǎng)施工條件、臨時(shí)設(shè)施以及環(huán)境溫度的影響，所以懸索橋施工控制的關(guān)鍵在于對(duì)主纜線形的精確計(jì)算，這也是近年來(lái)懸索橋施工控制的研究成為熱點(diǎn)問(wèn)題的主要原因之一。 本文是圍繞橋梁結(jié)構(gòu)監(jiān)控工作而展開(kāi)的，重點(diǎn)針對(duì)宜昌市廟嘴大江懸索橋進(jìn)行分析。全文應(yīng)用BNLAS軟件，對(duì)單跨838m懸索橋采用分段懸鏈線理論進(jìn)行施工控制計(jì)算。線形計(jì)算的主要內(nèi)容包括：主纜、吊桿、背索、扣索的無(wú)應(yīng)力下料長(zhǎng)度。通過(guò)計(jì)算成橋合理線形，反推結(jié)構(gòu)空纜線形并對(duì)跨中標(biāo)高及各索鞍預(yù)偏值進(jìn)行計(jì)算。具體針對(duì)懸索橋主纜施工特點(diǎn)、受力特點(diǎn)，對(duì)大跨徑懸索橋主纜施工監(jiān)控中的若干問(wèn)題進(jìn)行研究，，著重分析了不同溫度效應(yīng)下主纜施工控制參數(shù)、索股架設(shè)施工控制方面的內(nèi)容。研究了不同溫度下索股架設(shè)對(duì)主索鞍偏位的影響，探討了索股架設(shè)過(guò)程中遇到的問(wèn)題及對(duì)策，并對(duì)主纜架設(shè)的控制成果進(jìn)行分析預(yù)判。 在理論分析與實(shí)際計(jì)算的基礎(chǔ)上，提出了大跨徑懸索橋施工控制的部分參考意見(jiàn)。這些結(jié)論以期為該類橋型設(shè)計(jì)、施工提供可行的參考和借鑒，同時(shí)為大跨徑懸索橋在建設(shè)過(guò)程中的監(jiān)控提供有效依據(jù)。
[Abstract]:In recent years, with the vigorous development of long span suspension bridge in our country, the bridge type has been paid more and more attention and favor by the engineering circles. The suspension bridge is mainly composed of main cable, main tower, stiffened beam and sling, among which the main structure is pulled and the material utilization efficiency is high. High-strength steel wire is often used in main cable materials, which is more economical and reasonable than other materials in building long-span bridges. Considering the characteristics of high flexibility of long-span suspension bridge, the alignment of suspension bridge is easy to be affected by site construction conditions, temporary facilities and ambient temperature, so the key of construction control of suspension bridge is to calculate the main cable shape accurately. This is one of the main reasons why the construction control of suspension bridge has become a hot issue in recent years. This paper focuses on the bridge structure monitoring work, focusing on Yichang Miaozui Dajiang suspension bridge. Using BNLAS software, the construction control calculation of single span 838m suspension bridge is carried out by using the theory of segmental catenary. The main contents of linear calculation include: main cable, suspender rod, back cable, buckle cable. Through the calculation of the reasonable line shape of the bridge, the empty cable shape of the backward thrust structure is calculated, and the elevation in the span and the pre-deflection value of each cable saddle are calculated. According to the construction characteristics and stress characteristics of the main cable of the suspension bridge, this paper studies some problems in the construction monitoring of the main cable of the long-span suspension bridge, and emphatically analyzes the construction control parameters of the main cable under different temperature effects. Construction control of cable strands erection. The effect of cable strands erection on the saddle deviation of main cables at different temperatures is studied, the problems encountered in the process of cable strands erection and the countermeasures are discussed, and the control results of main cable erection are analyzed and forecasted. On the basis of theoretical analysis and practical calculation, some references for construction control of long span suspension bridge are put forward. These conclusions are expected to provide a feasible reference and reference for the design and construction of this type of bridge, and provide an effective basis for the monitoring and control of the long-span suspension bridge in the course of construction.
【學(xué)位授予單位】：長(zhǎng)安大學(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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