共查询到19条相似文献，搜索用时 125 毫秒
1.
粘钢技术因施工工艺简便、效率高、成本低和效果明显等优点而被广泛应用于房屋建筑及桥梁工程加固。本文通过框架梁加固的运用实例,分析粘钢技术的加固方案、构造及施工要求。 相似文献
2.
介绍了粘钢加固技术的特点、优势及应用范围;通过对某医院病房大楼框架梁的加固实例,分析了粘钢加固技术的设计计算方法以及施工工艺流程,验证了粘钢加固技术的有效性和综合效益。 相似文献
3.
钢筋混凝土梁粘钢加固的抗震性能研究 总被引：1，自引：0，他引：1
本文通过两榀框架试件(框架梁经过粘钢加固)在低周反复荷载下的结构性能的对比试验,研究了粘钢加固梁的承载力、变形能力、延性等抗震指标以及其破坏机制.试验结果表明,在设计上用粘钢加固的方法来提高框架梁的抗震能力是可靠的,粘贴钢板可以显著提高梁的承载力和刚度.本文还比较了几种锚固方式的结果,对粘钢加固混凝土梁的设计提出了一些建议. 相似文献
4.
丁斌 《温州职业技术学院学报》2008,8(4):45-47
钢筋混凝土的加固问题一直是国内外致力研究的一个课题。在众多混凝土加固方法中,外包粘钢加固法由于具有简单、快速、不影响结构外形等优点在建筑及公路桥梁中应用广泛。采用外包粘钢加固法由于灌浆料的不同,加固效果也有一定的差别。试验证明,采用钢板和CGM填料加固混凝土柱不仅可行,且效果良好。 相似文献
5.
韩艳丽 《杨凌职业技术学院学报》2009,8(2):46-48
钢板内衬加固技术是对已出现裂缝的钢笳砼管道进行加固补强,提高管道使用寿命的方法之一。该技术被广泛应用于水利设施的除险项目中。本文通过对宝鸡峡信邑沟水库除险加固工程放水洞钢板内衬加固施工中的钢板内衬应力分析、钢板制作和安装、接触灌浆等步骤的描述来阐述钢板内衬加固施工工艺简单、效果好等特点。 相似文献
6.
实际工程中经常遇到混凝土构件斜截面粘钢加固的问题，通过结构试验，本得出了斜粘钢板的最佳锚固方式以及构件开裂后卸荷斜粘钢板抗剪承载力计算方法，可供工程加固计算时参考。 相似文献
7.
李利 《成都航空职业技术学院学报》2006,22(2):42-44,46
文章分析了钢筋砼结构裂缝产生的原因,重点介绍了对裂缝状态的判定,阐述了裂缝修补和补强的基本方法,提出了对钢筋砼裂缝的预防措施。 相似文献
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9.
黄晓兰 《四川职业技术学院学报》2013,23(3):154-156
本文根据粘钢加固混凝土梁各种组成材料的布置特点,选用分离式模型,建立粘钢加固梁的有限元模型,采用不同厚度的钢板粘贴混凝土梁进行有限元仿真分析.分析结果显示,相同外荷载作用下,钢板厚度增加,界面剥离破坏荷载增加,当厚度超过一定值时,剥离破坏先于弯曲破坏,也就说在没有充分发挥梁弯曲承载力的情况下,结构就发生了破坏了. 相似文献
10.
混凝土结构粘钢加固是一种民用建筑工程的加固技术。目前,钢板贴合加同技术已经是一项成熟的加固技术,在房屋、道路、桥梁及电力、水利工程等混凝土结构维护改造加固材料及施土中已有所应用,其中以民用建筑行业应用的最为广泛。 相似文献
11.
后张法预应力构件施工改进及质量控制 总被引：2，自引：0，他引：2
广东省茂名学院图书馆工程主梁采用有粘结预应力混凝土结构和目前国内最先进的HVM系列锚具及高强度钢绞线。并在施工方法上作了改进。经济效果更加明显。工程质量进一步提高。 相似文献
12.
Retrofitting of RC Slabs Against Explosive Loads 总被引：1，自引：0，他引：1
OEHLERS Deric John 《天津大学学报(英文版)》2006,12(Z1)
With the increase of terrorist bomb attacks on buildings, there is a need to develop advanced retrofitting techniques to strengthen structures against blast loads. Currently, several guidelines including an Australian version for retrofitting reinforced concrete (RC) structures are available for the design of retrofitting systems against seismic and monotonic loads using steel or fibre reinforced polymer (FRP) plates that can be either adhesively bonded to the surface or near surface mounted to the concrete cover. However, none of these guidelines provide advice suitable for retrofitting structures subjected to blast loads. In this paper, numerical models are used to simulate the performance of retrofitted RC slabs subjected to blast loads. Airblast pressure distributions on the surface of the slabs estimated in a previous study are used as input in the analysis. A material damage model developed previously for concrete and an elastoplastic model for steel bars are employed in this research for modelling reinforced concrete behaviour due to explosive loads. The material models and blast loading are coded into a finite element computer program LS-DYNA3D to do the analysis. With the numerical model, parametric studies are conducted to investigate RC slabs retrofitted by either externally bonded or near-surface mounted plates or GFRP sheets subjected to blast loads. Discussion is made on the effectiveness of the retrofitting system for RC slabs against blast loads. 相似文献
13.
在总结已有预应力砼技术优缺点的基础上，提出横张预应力砼技术的基本概念与设计。它的使用能明显节约钢材、简化工艺、提高工效，具有很好的技术经济效益。 相似文献
14.
Dynamic tests of three bonded and two unbonded full-prestressed concrete beams were carried out.The purpose was to seek the relation between prestressing force and natural frequency.Test results indicate that the frequency of prestressed concrete(PSC)beam increases with the increase in prestressing force approximately.The results are different from the dynamic characteristics of isotropic material beam subjected to compressive axial force which were put forward by Clough et al.The reason is that the beams were considered as isotropic,homogeneous,linear elastic material in the traditional analysis method.However,more accurate results are required in the analysis of frequency of PSC beam.The constitutive mode of PSC member is analyzed based on microstructure of concrete in this paper.The orthotropic linear elastic mode is used to analyze the relation between dynamic frequency and prestressing force of concrete beam,at the same time the equivalent stiffness of prestressed tendon relating to the prestressing force is added to the bending deformation stiffness of the beam.The analytical value agrees well with the test result,indicating that the current analysis method in this paper is feasible to full-prestressed concrete beam. 相似文献
15.
栾军 《辽宁科技学院学报》2009,11(1):10-11
文章从设计、原材料、施工方法等入手,即采用抗裂筋、混凝土掺外加剂以及加强保温、保湿养护等技术工艺后,使超长超深地下综合管沟外壁混凝土裂缝问题得到了有效的控制。 相似文献
16.
为了确定钢筋、环氧树脂以及木材能否粘结在一起正常使用,仿照钢筋混凝土的拉拔试验作木材的拉拔试验,结果表明木材、钢筋和环氧树脂胶能较好的粘结在一起,这为钢筋增强木结构的可能性提供了重要支撑。 相似文献
17.
大跨预应力混凝土连续刚构桥墩梁结合部位受力复杂,且布置数量较多的预应力钢束,是刚构桥中的关键部位。结合昆明市城市三环路东段工程预应力混凝土连续刚构桥的设计方案,利用有限元分析软件ANSYS对墩梁固接区进行精细有限元局部分析,得到施工阶段及运营阶段墩梁固结区的应力分布。结果表明该结构预应力配束合理,施工阶段及运营阶段应力均满足设计规范要求。 相似文献
18.
Corbels support the crossbeams of half-through arch bridges. They are prone to cracking easily due to their characteristics and complicated loading conditions. Based on a practical diagnosis of a bridge crossbeam, we bonded steel plates onto bridge corbels to strengthen them. We carried out a numerical analysis on the effectiveness of the reinforcement by using the commercial sof~are ANSYS. The numerical analysis shows that the stresses near the section break increased slightly, but the variation amplitude was small and all the stresses were within an allowable range. The loading test indicates that it is feasible to strengthen the corbel with vertical bonded steel plates. Therefore, the reinforcement is effective and economical. This reinforcement method is suitable for this type of corbel and can be applied in similar cases. 相似文献
19.
INTRODUCTION Creep is an internal characteristic of concrete under long-term load. A long time has elapsed since the first discovery of concrete creep in 1907 by Hatt. Many researches have been devoted to this complex problem ever since. However, despite major suc-cesses, the creep phenomenon is still far from being fully understood, even though the phenomenon has occupied some of the best minds in the field, such as Glanville, Dischinger, Troxell, Pickett, Neville, etc. Creep phenome… 相似文献