The Yingxian Timber Pagoda' s most structural components are original, that is the most important cultural heritage for the study of Chi- nese architectural technology and rules for its long history and the complex construction. However, at present, the Timber Pagoda needs strengthening by reparative method due to out of repair for years. Worst of all, the second story of the Timber Pagoda leant severely due earthquakes and wars. In the past 80 yem's, more than tens domestic work units have been invited to participate in the study and conservation of the Timber Pagoda. The results of their research can be applied to design the conservation proposal. This paper summarizes and analyzes the research done on testing and monitoring the Timber Pagoda' s structure and put forward questions and suggestions for the relative researchers and engineers.

Angkor,a world cultural heritage site in Cambodia,has a very important role in architectural history.This is a very large,well-protected site and has great value in history,art and science.This paper describes studies of the architectural and structural forms of the Angkor Grottoes from the perspective of civil engineering.Based on on-site investigations,the main types of damage to the grottoes result from structural destruction and material destruction were determined.Different technologies,based on the type of destruction,should be used in conservation.

The newly-built south central railway of Shanxi will cross under Red Flag Canal which is a national key unit of cultural relics protection.We will assess whether the vibration of the train meets the allowed vibration standards of the ancient building when the operational train is in motion after the completion of the railway.In this paper,the Universal Mechanism software is used to establish a three-dimensional dynamic model of train-track,so as to get the wheel-rail force when the driving train crosses the track.Then we load the wheel-rail force on the finite element model of track,tunnel,mountain,and Red Flag Canal to calculate the dynamic response of the Red Flag Canal.The results of the study show that when the train crosses,the maximum point of vibration velocity in the canal is in the top of the external canal.The maximum speed of vibration is 1.1×10-4m·s-1,which can meet the requirements of anti-industrial vibration specification of ancient architecture.

<正>应县木塔是山西应县佛宫寺释迦塔的简称,外观五层六檐,主体结构实为九层(彩插图1)。其中,夹在相邻明层之间的四个结构层为平坐层(也称"暗层"),是一个中空的双层环状结构;其余五层为明层,每层均供奉佛像。每个结构层又都是由柱框层与铺作层组成的(图1),铺作层的构造对维持应县木塔整体

<正>应县木塔式建于辽清宁二年(1056年),高67.31m,是世界上现存木结构古建筑中具有如此规模和历史的文物建筑孤例。应县木塔本体是将1～2层的殿堂结构依次叠合而成,67.31m的高度使木塔自重大大增加,致使构架及

应县木塔建造于1056年,高达67.31m,而当时对木材横纹承压受力性能缺乏应有的知识,致使木塔下部1～3层柱顶水平木构件横纹承压应力严重超过设计值,产生不可恢复的承压变形,部分构件已严重劈裂。本文提出用玻璃纤维增强塑料(GFRP)棒局部增强横纹承压技术,短期荷载试验结果表明,组合木构件的横纹承压强度大幅度提高,刚度有所增加,其延性性能得到大的改善。在深入研究GFRP棒增强机理的基础上,提出了GFRP增强木材组合构件横纹承压承载力的简化计算公式。

轻型木结构住宅在我国已建成千余幢,随着经济进一步发展,北美木材商还将更多地向我国出口这种住宅,以满足新兴中产阶层提高居住条件的需求.轻型木结构的应用是木结构在我国停用二十来年后得到复兴的标志.这种房屋的楼盖主梁与搁栅、屋盖的脊梁与椽条、天棚搁栅及墙骨等主要承重构件皆采用规格材,因此确保规格材的安全可靠是轻型木结构施工质量的重中之重.所以,国家标准《木结构工程施工质量验收规范》GB 50206-2002将规格材应力等级的检验列为主控项目,属强制性条文.

The Larix gmelini is suggested by the authors to be used to repair the ancient wooden tower in Yingxian County of Shanxi Province in accordance with the provision of Technical Code for Maintenance and Strengthening of Ancient Timber Buildings,i.e. GB 50165--92. Since the checks during seasoning are more deeper than that of the other species and Yingxian County wooden tower is demanded to be handed down for thousand years after the repair, based on the testing results of an investigation for finding out the regularity of the seasoning checks and the contrast test of glued-laminated timber beams made of larch and fir, two measures to control seasoning checks are suggested: nail-connected beam of a pair of sawn timbers, the wide side of which is cut along diameter of the round timber; and glued_laminated timber. The checks of the timber members used to the repair of wooden tower in Yingxian County will be controlled within the limit stipulated in GB 50165--92.

本文通过哈尔滨市某高校教学实验楼木屋盖结构的可靠性鉴定实例,总结了长期服役的木结构可能发生的残损类型和原因;介绍了木材强度的检测和木构件强度等级的确定方法;通过主要承重构件的承载力和变形验算,证实该教学楼木屋盖仍可继续使用的可行性,并提出了相应的修缮加固措施.

In order to achieve a proper comprehension for stress-grade inspection of dimension lumber used for wood-frame construction stipulated in GB 50206-2002“Code for construction quality acceptance of timber structrues”,the relationship between the strength measured by bending test of dimension lumber and the design value of bending strength stipulated in GB 50005-2003“Code for design of timeber structures” was analyzed based on the reliability relax of timber structures.And the stress-grade assessment method of dimension lumber was suggested based on the sample inspection theory.An example of stress-grade inspection of dimension lumber was set for inspection organization.