共查询到20条相似文献,搜索用时 234 毫秒
1.
2.
本文根据文献[1]及文献[2]试验研究结果,对采用碳纤维增强材料(CFRP)包裹与传统木结构加固方法相结合的古建筑木结构加固技术在工程实例中进行了探索应用,应用结果表明该方法可更好地实现古建筑木结构的保护性加固。 相似文献
3.
木结构古建筑是中国古老文明的载体,木结构古建筑的安全检测与鉴定,是进行修缮修复工作必不可少的重要环节。通过了解建筑的历史沿革和现状,检测构件的完损情况、力学性能和变形情况,依据实测参数进行结构分析,评定建筑的安全性能。所得结论可以为古建筑的修缮加固提供依据,为建筑健康档案的建立提供基础数据。鉴定的方法和内容,可以为木结构古建筑相似工程提供参考。 相似文献
4.
为保护古建筑,采用归纳及分析方法,对中国古建筑木结构的抗震构造评估进行了探讨.基于《古建筑木结构维护与加固技术规范》相关规定,对古建筑木结构抗震构造的评估内容进行了论述;基于古建筑抗震构造评估现状,对现有的评估方法进行了归纳和汇总;基于2个典型实例,对古建筑木结构抗震构造评估内容和方法提出了相关建议.结果表明:中国古建... 相似文献
5.
6.
7.
中国木结构建筑类型多样、历史悠久,承载着浓厚的中国特色建筑文化,具有极高的历史、文化和艺术价值。然而,随着时间的推移,木结构古建筑在自然环境和人为因素下,受到了不同程度的破坏。因此,对木结构古建筑的加固技术研究,尤为重要。以福州某木结构古建筑的修缮加固工程为例,研究木结构古建筑的加固技术。结果表明,通过增加钢结构支撑与碳纤维增强材料CFRP加固技术,使得古建筑既能满足新的使用要求,又能很好地保持古建筑的原貌。 相似文献
8.
9.
古建筑木结构加固方法研究 总被引:6,自引:0,他引:6
中国古建筑以木结构为主,具有悠久的历史和文化价值,保护意义重大.本文作者根据木结构古建筑特点,讨论了木结构的不同破坏症状,如开裂、糟朽、挠度及拔榫等.在此基础上,主要讨论了木构件的各种加固方法.如采用墩接法加固柱根,采用嵌补法加固开裂构件,采用铁件加固法加固榫卯节点或裂缝较大构件,采用支顶加固法改善木梁弯曲受力状况,采用化学加固法对结构进行防腐加固,采用FRP法加固梁、柱及榫卯节点等.最后,结合工程实际,对几种常用的加固方法进行数值模拟分析,获得了加固前后的结构内力及变形数据,得出了对于不同的破坏类型,采取适当的加固方法均可有效提高木结构受力性能的结论.随着科技发展,更经济、有效的加固方法将用于古建筑木结构保护中. 相似文献
10.
中国古建筑是中国传统文化的重要载体,古建筑多以木结构为主;受自然环境、人为及历史变迁等因素的影响,古建筑的承载力和稳定性不断下降,会演变成体系性破坏。如何根据木结构的损伤特征,采取适合的修缮方法,是从事文物修缮、保护及管理工作者的责任所在。本文通过对孟庙启圣寝殿金柱的加固处理,探讨古建筑木结构加固方法,为古建筑木结构修缮加固提供一种借鉴。 相似文献
11.
Composite Floors made of Steel Fibre Reinforced Concrete and Timber For many years the timber‐concrete composite construction is known and approved particularly with regard to the revaluation and strengthening of timber beam ceilings. The benefits are an obvious increase of the load bearing capacity, a reduction of the deflection, a better vibration behaviour of the ceiling and an improvement of building physical properties like sound insulation and fire resistance. The reinforcement of the concrete slab is necessary, but leads to a large slab thickness in connection with the necessity of a sufficient concrete cover and to disadvantages during the execution of construction work. Therefore it is reasonable to replace the conventional reinforcement by steel fibres. This paper reports on two building projects and their associated experimental pre‐tests, in which steel fibre reinforced concrete was applied for the strengthening of timber beam ceilings. 相似文献
12.
Innovative concretes for timber‐concrete composite constructions. Timber‐concrete composite constructions are currently applied mainly for new buildings or when strengthening existing timber beam slabs. The load bearing capacity of timber‐concrete composite slabs is essentially affected by the material properties of the concrete slab and timber beam itself as well as the efficiency of bond between both parts. As nowadays a wide spectrum of different innovative concretes is available their applicability for timber‐concrete composite constructions has to be verified. In the following the focus is set for self‐consolidating concrete, steel fibre reinforced concrete, structural lightweight concrete, high‐strength and ultra high‐strength concrete. The advantages but also disadvantages of these concretes will be explained considering structural, economic and processing aspects and building physics. 相似文献
13.
传统木结构建筑的加固修缮设计原则和方法都与现代木结构和混凝土结构的加固有所区别,留园曲溪楼加固修缮设计中,较全面地分析了传统木结构建筑加固修缮设计中应考虑的若干关键问题,包括残损状况分析、基础加固、木构件加固、木构架整体加固等。采取以文物保护原则为基准,以传统工艺和新材料相结合的加固设计理念。 相似文献
14.
15.
木结构房屋的抗震性能及保护措施 总被引:9,自引:1,他引:8
从木结构房屋的构造形式特点出发 ,研究了不同烈度地震作用下木结构房屋的震害特点 ,并以西安回民保护区典型木结构房屋为例 ,按 8度抗震设防考虑 ,分别对木结构房屋的纵向、横向进行了内力分析和承载力计算 ,并利用通用有限元程序ANSYS对木结构房屋进行了三维空间分析。通过平面与空间的计算 ,指出木结构房屋抗震存在的问题 ,讨论了对木结构房屋应采取的抗震保护措施 相似文献
16.
为了有效提升古建木梁的承载能力,提出采用拉区粘贴纤维复合材料、压区内嵌钢筋的复合加固方法。对11根矩形木梁进行三分点加载试验,主要考虑加固方法、受拉区名义配筋率和木材种类等影响因素,观察并记录试件的受力过程及破坏形态,获取试件的荷载 挠度曲线及荷载 应变曲线,进而分析各因素对木梁抗弯性能的影响。研究结果表明:仅拉区加固时,木梁试件的承载力、刚度和延性随着受拉区名义配筋率的增加而提高,但提升幅度不显著;拉压区复合加固木梁的承载力及刚度均高于仅拉区加固木梁,采用拉压区复合加固能显著提高原木梁的承载力及刚度,但其延性略有降低;在相同加固方法下,加固松木木梁的承载力及刚度提高幅度要优于杉木木梁。加载过程中,木梁跨中截面应变沿高度方向基本符合平截面假定,木材与加固材料的应变基本一致,表明拉压区复合加固方法可以保证木材与加固材料间的协调工作。基于试验结果,提出拉压区复合加固木梁的承载力计算模型,其理论计算值与试验结果吻合良好。 相似文献
17.
CFRP布包裹加固旧木柱轴压性能试验研究 总被引:7,自引:0,他引:7
本文进行了6根CFRP包裹加固旧木柱轴压性能试验研究。试验结果表明,CFRP布环箍加固的侧限约束作用可以提高木柱的强度约10~20%。并显著改善木柱的变形性能。 相似文献
18.
The combustibility of timber is one of the main reasons that many building regulations strictly limit the use of timber as a building material. Fire safety is an important contribution to feeling safe, and an important criterion for the choice of building materials. Historically, the combustibility aspect of wood has been a disadvantage for using timber as a construction material. The main precondition for an increased use of timber in buildings is providing adequate fire safety. This paper reviews the opportunities and challenges to reach this goal by implementing Fire Safety Engineering and Performance Based Design principles. 相似文献
19.
Hybrid bridges with log‐glued‐laminated timber. In Germany, timber as load‐bearing element of bridges is only used for the construction of foot‐ and bicycle viaducts. The development of new timber‐based products and modern technologies gives interesting chances for timber bridge‐building in future. Main beams with high stiffness and stability of dimension can be produced by log‐glued lamination of timber. Efficient hybrid cross‐sections of superstructures as timber‐concrete‐composite constructions can be made by the combination of beams consisting of log‐glued‐laminated timber and concrete deck slab. For road bridges, these hybrid cross‐sections could be used alternatively to conventional methods of construction. The following paper gives a review of the development status of timber‐concrete‐composite construction in bridge building and shows static and constructive specifics. 相似文献