碳纤维复合材料加固混凝土结构技术施工优越性

碳纤维复合材料加固混凝土结构具有不破坏原结构,施工方法简便,加固后能使结构满足设计要求等优点.本文通过其性能特点、力学性能、加固设计方案依据等的论述,指出了碳纤维复合材料在施工方面的优越性.     

CFRP加固钢筋混凝土结构的技术与应用

碳纤维复合材料（CFTP）具有比强度比模量高、耐腐蚀、可设计性好且成型容易等优异特性；采用碳纤维复合材料加固钢筋混凝土结构，完全避免了传统加固方法施工周期长、难度大、费用高、不能加固曲面等形体复杂构筑物等缺点；综述了国内外有关CFRP加固钢筋混凝土结构的技术与应用的最新进展。     

碳纤维复合材料在水利水电加固工程中的应用

碳纤维复合材料加固修复混凝土结构技术近年来在房建、桥梁等领域得到了广泛应用,而针对水利水电加固工程中的防水、防腐蚀及构件不规则等特点,碳纤维复合材料则更具有适用性。鉴于此,基于水利水电加固工程视角,介绍了碳纤维复合材料与粘结材料的特性及其加固技术的功能和特点,阐述了利用碳纤维材料加固水利水电结构的几个工程实例,并对碳纤维复合材料在水利水电结构加固中的应用前景作了分析。     

土木工程中碳纤维复合材料的运用研究

碳纤维复合材料是随着纤维增强材料的一个重要组成部分,碳纤维复合材料对于结构补强加固十分有效,其施工质量高,施工效率高,加固效果和综合效益好,具有轻质高强、可设计性强的特点。因此,对碳纤维复合材料的研究和探索,一直是土木工程中关注的重点内容。     

碳纤维加固技术在慈城新天地商业用房中的应用

碳纤维复合材料是新兴高强材料,具有强度高、自重轻等优良性能。相比传统结构加固方法,它高强,高效,施工快捷,使用面广,具有非常广泛的发展前景。本文简介炭纤维复合材料在结构加固中的设计计算及施工方法。     

浅析碳纤维布加固砌体结构新技术

碳纤维又称碳纤维增强复合材料(Carbon Fiber Reinforced Polymer,简称CFRP)广泛应用混凝土结构加固技术,而粘贴碳纤维布对砌体结构进行加固仍处于试验研究的初始阶段。粘贴碳纤维布加固是提高砌体结构抗剪承载力和延性的非常有效的办法。本文主要介绍碳纤维布加固砌体结构的工作原理,施工步骤,总结了碳纤维布加固技术的优点,通过试验进一步探究碳纤维布在受剪构件中的力学性能。     

碳纤维布在加固工程中的应用

碳纤维布作为一种常用的复合材料,凭借着自身重量轻、强度高、施工操作高效等优势,被广泛地应用于旧桥加固工程中,为了提高旧桥加固效率和效果,本文首先以"广州港务局西基桥"为例,根据碳纤维布的主要特点,从工艺材料准备、粘贴碳纤维布典型工艺流程、关键工序施工要点等方面入手,探讨了碳纤维布粘贴施工工艺。最后,将本文所提出的碳纤维布粘贴施工工艺应用于工程实践中,结果表明:本文所提出的碳纤维布粘贴施工工艺具有非常高的可靠性和可行性,不仅可以实现对桥跨结构的科学加固,还能保证桥跨结构加固效果,其加固效果完全符合现有使用功能的需求。     

国内首个碳纤维加固领域技术规范出台

<正>2019年3月18日,国内首个碳纤维复合材料加固修复化工管道技术规范正式出台。该技术规范由上海石化、哈尔滨工业大学等单位负责起草,对碳纤维复合材料加固修复金属化工管道的材料性能指标、设计方法、施工方法、检验与验收方法等做了明确要求,对碳纤维加固行业健康发展具有重要意义。     

碳纤维复合材料在十字河大桥结构加固中的应用

论述了碳纤维复合材料加固技术应用于枣庄市十字河大桥的加固施工过程和关键技术.经静载和动载测试证明该工程加固效果良好,碳纤维复合材料加固技术具有广阔的推广前景.     

碳纤维复合材料的新应用

本文介绍了国外碳纤维复合材料片及其在修补加固钢筋混凝土结构中的应用情况、碳纤维复合材料片修补加固工艺的特点和对钢筋混凝土结构物修补加固的效果及推广应用前景。     

钢骨混凝土结构在石化类结构设计中的应用

介绍了钢骨混凝土结构的特点、设计原理和模型分析，并结合实际工程，提出了施工中需注意的若干事项。     

Principles and practices of adhesive bonded structural joints and repairs

Adhesive bonding has been used for a number of decades for construction of aircraft components. Light weight sandwich construction and structural bonded joints form a major proportion of modern aircraft. Bonded patches are also used for repair of sandwich panels, cracks in metallic structure or reinforcement of deficient structures. The in-service durability of bonded structures and repairs has varied dramatically, with some structures and repairs providing life-of-type service and others failing in a very short time, leading to a poor acceptance by aircraft operators of adhesive bonded structures and repairs. A corresponding reluctance has occurred amongst manufacturers and repair authorities to accept the superior performance of adhesive bonding which has been demonstrated in laboratory and field trials over a number of decades. The variability of bonded joints can occasionally be traced to deficient bonded joint design, but usually the deficiency lies in a lack of understanding of the adhesive bonding processes. If some basic principles are applied (and preferably embodied in some form of design and processing standard for airworthiness certification) reliable adhesive bonded structures and repairs would achieve a significantly superior performance over conventional mechanically fastened systems. This paper details basic principles required for the production of strong, durable adhesive bonds.     

Glued joints in hardwood timber

The use of glued joints offers an option with ample aesthetic and functional possibilities in the design of wood structures. This type of joint is used since years 1970 in countries of North and Central Europe, for the design and construction of glulam (glued laminated timber) structures. This has led to diverse investigations in the experimental analysis of joints made with steel bars glued-in glulam subjected to axial loads. It led to diverse formulae of empirical base for the design of the same ones. Of these empirical formulae, the proposal of Riberholt is considered to be a pioneer. Likewise, the Eurocode 5 has included in more recent years a formula for the design of these unions, though only as an Informative Annex.From these precedents, our research equipment has developed an extensive experimental campaign directed to evaluating the adjustment of these proposals to the design of joints in elements made with hardwood saw timber. This can be of great usefulness in works of restoration, because glued joints have an enormous potential for repairing old structures.In this paper, diverse experimental campaigns made with threaded steel bars glued-in hardwood saw timber of high density are described.     

环形支撑在软土层异形深基坑中的应用

城市内的深基坑工程的周边环境通常比较敏感、复杂,存在老的浅基础建筑、构筑物和地下管线等,基坑工程的施工往往受到环境制约。这些敏感环境对基坑施工产生的变形要求要求严苛。本文以南京城区内某软土层深大基坑工程为背景,介绍了环形支撑的设计方案,结合实测数据,说明环形支撑在软土层异形深基坑中有效的保护了周边环境,取得了良好的社会效益,可为类似敏感环境条件下的软土层异形深基坑工程设计提供借鉴和参考。     

FRP桥梁上部结构的撞击破坏实验研究

近年来,纤维增强复合材料(FRP)已经在桥梁工程中获得了逐步推广和应用,尤其是在人行天桥的设计和建设中。但是,超高车辆撞击城市桥梁上部结构的事故频繁发生,严重威胁城市交通的正常运行。为确保FRP结构能更广泛地应用于城市桥梁中,提高其作为上部结构的抗撞能力,需要深入研究超高车辆-FRP结构碰撞机理。本文基于碰撞试验,对典型的超高车辆-桥梁上部结构碰撞进行了模拟,确定了此类梁的撞击破坏过程,位移响应,作用方式和损坏机理。分析结果将用于有限元分析和验证中,从而改进FRP上部结构应对此类冲击荷载时的结构响应。     

结构施工时变内力分析

将使用阶段的结构作为受力分析对象是目前结构设计的常规做法,其结果是结构的最终内力、变位等与施工过程无关,这不符合工程实际情况,而现行的结构工程施工内力有限元法并没有提供相应的公式能解决这个问题。利用施工过程时变有限元分析方法对结构施工内力进行几何非线性分析,使计算结果更符合结构施工的实际情况,全过程跟踪分析结构在施工各阶段以及施工完毕时的变量,指出结构工程设计考虑施工过程时变效应影响的重要性。     

Lightweight fire protection of steel framed buildings: Comments on russian experience in use of light weight fire protection coverings for steel frame buildings

In recent year, increased attention, linked to the use of new structural design criteria and materials, has been given to maintaining the integrity of buildings and structures exposed to fire. Structures are now designed using lighter structural shapes and consequently differ from earlier, more traditional buildings, in terms of their resistance to the effects of the high temperature of fire. Contemporary structures are less expensive. Advance in building construction technology also result in faster erection.     

13.00-24平地机轮胎的设计及改进

介绍了13．00－24平地机轮胎的结构设计、施工设计及为解决卸胎困难所采取的放大着合直径、减小胎圈宽和调整钢丝圈与胎体帘布层结构等改进措施，经过成品轮胎性能检测及解剖国外样品轮胎进行对比分析，结果表明，改进后既达到了预期效果，又使单胎节约原材料成本98．06元。     

基于Polyflow模拟的塑木建筑墙板异型材机头流道设计

以典型的宽幅大厚度聚氯乙烯(PVC)塑木建筑墙板为研究对象,以实际配方、工艺参数和设备结构参数为模拟条件,借助Polyflow有限元模拟软件,分析了机头压缩比、分流支架、阻力元件等结构对机头挤出过程速度场和压力场的影响,以熔体流速均匀分布为优化目标来逐步指导新流道的设计,获得了较优的机头流道结构参数,实现了基于流场模拟...     

Desktop manufacturing of complex objects,prototypes and biomedical scaffolds by means of computer‐assisted design combined with computer‐guided 3D plotting of polymers and reactive oligomers

Computer‐assisted design and image processing were combined with computer‐guided one‐ and two‐component air‐driven 3D dispensing of hotmelts, solutions, pastes, dispersions of polymers as well as monomers and reactive oligomers to produce solid objects with complex shapes and tailor‐made internal structures. During the 3D plotting process either individual microdots or microstrands were positioned in order to construct complex objects, fibers, tubes and scaffolds similar to non‐wovens. The resolution was in the range of 200 μm and depended upon inner nozzle diameter, air pressure, plotting speed, rheology, and plotting medium. Plotting in liquid media with densities similar to that of the dispensing liquid eliminated the need for construction of temporary support structures. The design capabilities of this computer‐guided 3D plotting process was demonstrated using conventional moisture‐curable silicone resin.