【摘要】：近年來，我國交通事業(yè)隨著經(jīng)濟(jì)和社會(huì)的發(fā)展得到了快速發(fā)展，公路和鐵路里程在不斷增大，公路等級(jí)逐漸提高，高標(biāo)準(zhǔn)鐵路開始大范圍修建，交通行業(yè)在國民經(jīng)濟(jì)生活中發(fā)揮的作用越來越大。目前我國所修建的各種橋梁結(jié)構(gòu)絕大部分為鋼筋混凝土和預(yù)應(yīng)力混凝土結(jié)構(gòu)。在橋梁結(jié)構(gòu)設(shè)計(jì)時(shí)，，為了單純?cè)黾咏Y(jié)構(gòu)安全性或者經(jīng)濟(jì)性，使得橋梁結(jié)構(gòu)的設(shè)計(jì)過于安全或者材料節(jié)省過多導(dǎo)致結(jié)構(gòu)安全度降低。橋梁結(jié)構(gòu)設(shè)計(jì)的合理性，直接關(guān)系到橋梁的安全、經(jīng)濟(jì)與耐久。橋梁設(shè)計(jì)應(yīng)與交通特性和發(fā)展趨勢(shì)相適應(yīng)。 在設(shè)計(jì)中，對(duì)于標(biāo)準(zhǔn)跨徑橋梁設(shè)計(jì)可根據(jù)標(biāo)準(zhǔn)圖進(jìn)行設(shè)計(jì)，而對(duì)于非標(biāo)準(zhǔn)跨徑或需要對(duì)標(biāo)準(zhǔn)圖中設(shè)計(jì)參數(shù)進(jìn)行修改時(shí)，設(shè)計(jì)參數(shù)和含鋼量等一系列的設(shè)計(jì)指標(biāo)對(duì)橋梁的設(shè)計(jì)和經(jīng)濟(jì)投入起著控制作用。結(jié)合以前橋梁建設(shè)中出現(xiàn)的問題，如何利用設(shè)計(jì)參數(shù)控制設(shè)計(jì)和優(yōu)化設(shè)計(jì)指標(biāo)值得探討。如果設(shè)計(jì)指標(biāo)過低或者過高就會(huì)造成橋梁設(shè)計(jì)的不合理，非常容易導(dǎo)致事故的發(fā)生或者資金的浪費(fèi)。因此研究中小跨徑簡(jiǎn)支梁橋設(shè)計(jì)參數(shù)取值十分必要。 本文主要研究設(shè)計(jì)參數(shù)的變化趨勢(shì)以及設(shè)計(jì)參數(shù)對(duì)橋梁設(shè)計(jì)指標(biāo)的影響。分析設(shè)計(jì)參數(shù)，對(duì)其變化趨勢(shì)進(jìn)行研究。通過對(duì)設(shè)計(jì)參數(shù)的分析研究非標(biāo)準(zhǔn)圖設(shè)計(jì)時(shí)設(shè)計(jì)參數(shù)的控制和選擇，為設(shè)計(jì)指標(biāo)的設(shè)定提供參考，可以對(duì)橋梁設(shè)計(jì)工作起到積極作用。
[Abstract]:In recent years, with the rapid development of economy and society, the mileage of highway and railway is increasing, the grade of highway is gradually improved, the high standard railway begins to be built on a large scale, and the transportation industry plays a more and more important role in national economic life. At present, most of the bridge structures built in our country are reinforced concrete and prestressed concrete structures. In the design of bridge structure, in order to simply increase the safety or economy of the structure, the design of the bridge structure is too safe or the material saving is too much, which leads to the reduction of the safety degree of the structure. The rationality of bridge structure design is directly related to the safety, economy and durability of the bridge. Bridge design should be in line with traffic characteristics and development trends. In the design, the design of the standard span bridge can be designed according to the standard drawing, while for the non-standard span or the need to modify the design parameters in the standard drawing, a series of design indexes, such as design parameters and steel content, play a role in controlling the design and economic input of the bridge. Combined with the problems in bridge construction, how to use design parameters to control the design and optimize the design index is worth discussing. If the design index is too low or too high, it will lead to unreasonable bridge design, which can easily lead to accidents or waste of funds. Therefore, it is necessary to study the design parameters of small and medium span simply supported beam bridges. In this paper, the changing trend of design parameters and the influence of design parameters on bridge design index are studied. The design parameters are analyzed and the changing trend is studied. Through the analysis and study of the design parameters, the control and selection of the design parameters in the design of non-standard drawings can provide a reference for the setting of the design index, and can play an active role in the design of the bridge.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.5

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