共查询到20条相似文献,搜索用时 234 毫秒
1.
将建筑信息模型(BIM)技术应用于轻型木结构建筑工程中,结合轻型木结构框架体系的特点,针对木框架结构建模效率低容易出错等问题,基于Dynamo可视化编程平台开发了墙体和楼盖的快速建模参数化工具,通过调用建筑模型和输入结构参数便可快速自动地创建出轻型木结构框架。 相似文献
2.
介绍轻型木结构楼、屋面板冲击荷载性能试验的条件、装置和方法,根据规范要求研制加载装置,并进行木结构用意杨结构胶合板的冲击荷载性能试验研究,旨在为国产速生林用于轻型木结构的研究提供一些试验数据。试验结果表明:与国外结构胶合板具有相同厚度的轻型木结构用意杨屋面板和楼面板,其冲击荷载受弯性能均优于我国木结构工程施工质量验收规范标准要求。 相似文献
3.
钉连接是木结构中重要的连接节点,在轻型木结构建筑的剪力墙中起到重要的承载作用。不论国内还是国外,结构胶合板、定向刨花板、冷杉木材都是木结构建筑中主要的建筑材料。笔者研究了不同覆板类型与冷杉木材钉连接的动态荷载性能,对不同厚度胶合板、定向刨花板、钉直径与冷杉的连接性能进行了对比(静态荷载和动态荷载)研究。结果表明,钉直径、覆板种类和厚度对动态载荷性能、破坏位移影响显著,10D钉连接冷杉和不同覆板材料时,连接性能最佳;相同厚度的定向刨花板比结构胶合板与冷杉的连接性能好;厚度为16 mm的结构胶合板具有良好的连接性能。本研究为轻型木结构的建造提供理论和实际测试依据。 相似文献
4.
《林产工业》2017,(8)
基于中国国情的轻型木结构屋面板的应用研究对于轻型木结构建筑在中国的发展有着重大的推动作用。以适于中国国情的定向秸秆板作为轻型木结构建筑的屋面板,通过试验研究其作为屋面板的集中静载和冲击荷载性能。研究结果表明:定向秸秆屋面板干湿状态下,集中静载的平均挠度分别为5.56mm和6.23mm,极限荷载分别为2821N和2778N,在冲击荷载达到规定的102N·m(即冲击高度达到760mm)的情况下其平均挠度分别为5.46mm和6.09mm,极限荷载分别为3257N和3094N。与国内外常用的轻型木结构屋面板相比,定向秸秆板作为屋面板其集中静载和冲击荷载性能均优于相关标准要求。 相似文献
5.
为促进木结构建筑减振降噪研究,以一栋普通轻型木结构建筑和一栋葡萄牙软木优化轻型木结构建筑为研究对象,采用瞬态激励法和现场声压级法,分别测试两栋建筑的动力参数(频率、峰值加速度、阻尼比)和隔声量,并进行相关分析。结果表明:两种轻型木结构建筑均符合舒适度要求,同时软木优化轻型木结构建筑的平均阻尼比比普通轻型木结构建筑高1.6%;在关闭门窗,交通噪声源和扬声器噪声源共同作用情况下,软木优化结构建筑的平均隔声量比普通结构高4.6 dB(A);其中软木优化结构的减振降噪性能好于普通轻型木结构建筑,可以明显改善木结构建筑楼盖振动特性和隔声效果。上述以期为轻型木结构建筑的减振降噪优化设计工作提供技术支撑,具有工程应用价值。 相似文献
6.
7.
8.
介绍平台框架式木结构的结构形式,并对其设计方法进行探讨,在此基础上以一栋建筑面积30m2、单层框架式木结构房屋为实例,参照最新的木结构设计规范以及相关荷载设计规范,采用LRFD法对结构所承受的荷载以及主要构件进行设计。通过此设计实例,分析轻型木结构的设计步骤,提出一些我国在木结构设计和研究方面所存在的问题,为相关设计和研究人员提供参考。 相似文献
9.
10.
11.
12.
13.
儒家思想是渗透到中国古代社会生活各个领域的正统哲学和伦理观念,它对中国木结构建筑有着深远影响。因此,中国木结构建筑的研究不应该只从"历史"和技术发展入手,还要将文化和建筑的发展结合起来。介绍并分析了儒家文化对中国古代木结构建筑发展的影响,概述儒家思想影响下的中国古代木结构建筑哲学,分析了木结构建筑设计中儒家思想传承与发展的不足,并提出了相应对策,以期为中国木结构建筑的创新和发展提供借鉴。 相似文献
14.
15.
ZHUJiao-jun LIXiu-fen GondaYutaka MatsuzakiTakeshi 《林业研究》2004,15(4):305-312
One of the most important and frequently studied variable in forests and the most basic element in governing transport processes of airflow is wind speed. The study of wind profile, defined as the change of wind velocity with height, and wind velocity are important because of tree physiological and developmental responses. Generally, wind profiles above the ground or at a canopy surface follow classical logarithm law, but wind profiles in a single tree and in a forest stand are not logarithmic. This paper summarizes the results of wind profile studies within a single tree, in a forest stand, above the forest canopy and in a forest area from recent research in a coastal pine forest. The results demonstrate that: 1) wind profiles with in a single conifer tree crown showed an exponential function with height, 2) wind profiles in forest stands were able to be expressed by attenuation coefficient of wind, 3) wind profiles over a forest canopy could be determined using profile parameters (friction velocity, roughness length and displacement), and 4) for a forest area, the extreme wind speed could be predicted reasonably using the methods developed for the design of buildings. More research will be required to demonstrate: 1) relationships between wind profiles and tree or stand characteristics, 2) the simple methods for predicting wind profile parameters, and 3) the applications of wind profile in studies of tree physiology, forest ecology and management, and the detail ecological effects of wind on tree growth. 相似文献
16.
17.
18.
Summary Applying modern methods of analyzing floor, wall, and connection subsystems in light-frame wood buildings requires information on the stiffness of nailed joints under long-term loads. Because this information can best be derived by testing nail-joint specimens under constant loads, theoretical procedures were developed that use test data for constant loads to predict stiffness under variable in-service loads; five nonlinear, viscous-viscoelastic models were develpoed on the basis of existing formulations of creep and mechanisms of load transfer between nails and wood. The models incorporated the modified superposition and strain-hardening principles in describing responses to discrete or continuous loading functions. Tests have shown that the models closely predict creep slip of typical nailed joints.This research was jointly supported by the Forest Research Laboratory, Oregon State University, and the Cooperative State Research Service, U.S. Department of Agriculture, Special Grant 85-CRSR-2-2553. This is Paper 2288 of the Forest Research LaboratoryFormerly Graduate Research Assistant Forest Research Laboratory 相似文献
19.
20.
The study of seed dispersal has received considerable attention in tropical ecology with emphasis placed on its role in the maintenance of species diversity. Since seeds of numerous high-value tropical timber trees are nominally or actively wind dispersed, the subject is also of interest to tropical foresters. In central Africa, up to 70% of harvested timber trees are wind dispersed, including African mahoganies of the genus Entandrophragma. The dual goals of managing many remote areas in central Africa for both biodiversity and timber production values has led to the consideration of low impact logging techniques. In the Central African Republic, increasing light downwind of Entandrophragma has been proposed as a way of increasing regeneration and recruitment of these trees. Mean wind direction at the time of dehiscence of Entandrophragma angolense and Entandrophragma cylindricum was compared with compass orientation of seed shadows for five individuals in mature, undisturbed forest. Mean wind direction was found to be toward the northeast for morning, afternoon, and daily winds and was significantly different from the orientation of seed shadows for all trees. Mean branch direction did not vary significantly from a random pattern, but matched the direction of the seed shadow better than wind direction did. It is concluded that harvesting interventions aimed at increasing light downwind of Entandrophragma will not necessarily benefit seedlings of the species at the study site and further silvicultural research is needed to determine appropriate management interventions, particularly in remote areas of Africa where conservation values are important. 相似文献