本文選題：橋梁空心高墩　切入點(diǎn)：塑性鉸　出處：《青島理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：地震一直以來都是土木工程領(lǐng)域的一重大難題，破壞巨大而又難預(yù)測，而且同時(shí)我國地貌類型錯(cuò)綜復(fù)雜，，山區(qū)面積多，所以西部的公路鐵路線路不可避免的要跨越深溝險(xiǎn)壑，這就使得橋梁在線路中往往要占到很大的比例，山區(qū)橋梁運(yùn)用高墩能夠使得橋型更加合理、經(jīng)濟(jì)、節(jié)約成本。而對于通常的高墩橋梁結(jié)構(gòu)都不屬于一般的規(guī)則橋梁范疇，該類橋梁的抗震設(shè)計(jì)現(xiàn)如今國內(nèi)外都沒有現(xiàn)成的規(guī)范可依。所以，研究一個(gè)專門對于高墩橋梁的抗震設(shè)計(jì)新理念，深入研究橋梁高墩的抗震設(shè)計(jì)問題，以此來提高我國高墩橋梁的抗震能力，是非常有必要的。 本文運(yùn)用非線性有限元分析軟件ABAQUS對典型的鋼筋混凝土空心高墩的延性性能以及抗震設(shè)計(jì)方法進(jìn)行了研究，主要有以下這幾個(gè)方面的研究工作： ①介紹了高墩的延性類別、塑性耗能機(jī)制、延性指標(biāo)及延性構(gòu)造措施等延性抗震設(shè)計(jì)方法； ②運(yùn)用非線性有限元分析軟件ABAQUS對典型的鋼筋混凝土空心高墩進(jìn)行模擬，分析其軸壓比、縱向配筋、橫向約束配箍及混凝土強(qiáng)度等因素對墩柱延性抗震的影響，比較在不同情況下截面的曲率延性系數(shù)，從而得到這幾個(gè)因素對典型的鋼筋混凝土空心高墩延性性能的影響； ③結(jié)合第四章的影響高墩延性抗震的軸壓比、配筋、混凝土等的因素分析結(jié)果，提出并驗(yàn)算了一種鋼筋混凝土空心高墩的延性抗震優(yōu)化方案，增大塑性鉸區(qū)外截面的強(qiáng)度，通過對比分析在不同地震強(qiáng)度下墩柱的塑性鉸單元分布、最大延性系數(shù)及墩頂位移來驗(yàn)證其對延性抗震的影響。 最后，總結(jié)了本文中的成果及不足之處，對空心高墩延性的分析研究提出了進(jìn)一步的研究方向。
[Abstract]:The earthquake has always been a major problem in the field of civil engineering. The damage is huge and difficult to predict. At the same time, the geomorphology of our country is complicated and there are many mountainous areas, so the highway and railway lines in the west inevitably have to cross deep gully and gully danger. This makes bridges often account for a large proportion of the lines. The use of high piers in mountain bridges can make the bridge more reasonable, economical and cost effective. But for the normal bridge structures with high piers, they are not in the general category of regular bridges. Nowadays, there are no ready-made codes for aseismic design of this kind of bridges at home and abroad. Therefore, a new concept of seismic design for bridges with high piers is studied, and the problem of seismic design of high piers of bridges is deeply studied. It is necessary to improve the seismic capacity of high pier bridges in China. In this paper, the ductility and seismic design methods of typical reinforced concrete hollow high pier are studied by using nonlinear finite element analysis software ABAQUS. The main contents are as follows: 1. The ductile seismic design methods of high pier, such as ductility type, plastic energy dissipation mechanism, ductility index and ductile structural measures, are introduced. The nonlinear finite element analysis software ABAQUS is used to simulate the typical reinforced concrete hollow high pier, and the influence of axial compression ratio, longitudinal reinforcement, transverse confined hoop and concrete strength on the ductility of pier column is analyzed. By comparing the curvature ductility coefficient of the section under different conditions, the influence of these factors on the ductility of typical reinforced concrete hollow high pier is obtained. Based on the results of the analysis of the factors such as axial compression ratio, reinforcement, concrete and so on, which affect the ductility of high pier in Chapter 4th, a ductility seismic optimization scheme for hollow high pier of reinforced concrete is proposed and verified to increase the strength of the section outside the plastic hinge area. The effect of plastic hinge element distribution, maximum ductility coefficient and pier top displacement on ductile earthquake resistance is verified by comparing and analyzing the plastic hinge element distribution, maximum ductility coefficient and pier top displacement under different earthquake intensity. Finally, the achievements and shortcomings of this paper are summarized, and the further research direction of the ductility of hollow high piers is put forward.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U443.22;U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉慶華,閻貴平,陳英俊;低配筋混凝土橋墩抗震性能的實(shí)驗(yàn)研究[J];北方交通大學(xué)學(xué)報(bào);1996年05期

2 王克海;李茜;韋韓;;國內(nèi)外延性抗震設(shè)計(jì)的比較[J];地震工程與工程振動(dòng);2006年03期

3 梁智W

本文編號：1633001