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bridges in china

bridges in china'meaning
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  • It ' s the first time clearly and systematically to present the concepts of restraint influence coefficient of steel to strain increment , to curvature increment and to deflection increment due to creep which are different each other . theoretical formulae are established , and approximate formulae are also obtained while considering the characteristics of common - used concrete and ambient condition of real bridges in china . so , an approximate restraint influence coefficient method to analyze the effect due to creep and shrinkage in pc bridges is put forward , and the equations to estimate second - force due to creep considering influence of steel in system - transferred continuous pc bridges is also established
    本文首次清晰而系统地提出了钢筋对徐变的不同效应(徐变应变、徐变曲率、徐变上拱)约束影响系数的概念,建立了相应的计算式;结合我国普遍采用的混凝土的徐变特性和桥梁的构造特点及工作中南大学博士学位论文摘要环境特征,给出了具有较高计算精度的实用计算式;在此基础上,建立了桥梁徐变效应近似分析的钢筋约束影响系数法,并推导出了考虑钢筋影响的超静定梁徐变次内力的近似计算式,可方便地应用于桥梁研究和设计中。
  • The shantou bay suspension bridge is the first mordern suspension bridge in china its substructures are mainly towers and anchorages this paper presents some of the key techniques of the substructures construction , including the cable anchorage system setup , the hydrated heat control in the anchorage , construction of the foundation and bearing plate of the tower in the ocean , the control of tower construction , etc
    汕头海湾大桥是我国第一座现代悬索桥下部结构主要包括索塔和锚碇本文介绍了该桥下部结构施工的一些关键技术环节,包括主缆锚碇锚固系统的安装,大体积混凝土的温控防裂,主塔基础和承台的海上施工,塔柱滑模施工控制等
  • Hence , on the basis of research achievements of other countries , the mechanical characteristics of the statically indeterminate composite bridge is analyzed in this thesis by utilizing the large universal finite element software , msc / nastran and msc / patran , to promote the application and development of the composite bridge in china
    为此,本文在总结各国研究成果的基础上,利用大型通用结构分析程序msc nastran和msc patran ,对超静定组合梁桥的受力特性进行了分析研究,目的是推动这一结构形式在中国的应用和发展。
  • This paper has studied and set up a supervision and control system based on the backing item of jinzhou yangtze river bridge with main span of 500m , by analyzing the development of construction control of cable - stayed bridges in china and abroad , foreword calculation of 250 work cases of plane bar fem , adoption of advanced equipment and devices , quick analysis of gathered data research of karemen filtering method , least square and gray model gm ( 1 , 1 ) into the identification of the real state and precuts and effective manage mechanism
    本文以荆州长江公路大桥主跨500米的混凝土斜拉桥施工为应用背景,通过分析目前国内外大跨度混凝土斜拉桥施工控制现状,结合该桥施工实践,运用平面杆系有限元计算理论对大桥250个工艺进行正装计算,采用先进测试设备和仪器,利用计算机快速分析处理技术对现场监测系统收集的数据进行误差分析,系用卡尔曼滤波法、最小二乘法和灰色理论gm ( 1 , 1 )进行结构真实状态的识别和后期预测,通过科学高效的监控管理机制的运行和监控实践,探索并建立了一套适合于大跨度混凝土斜拉桥的施工监测监控体系。
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