For reinforcement concrete corbel with the shear span to depth ratio ( a / ho ) less than 1 , has its performance of mechanics that is close to cantilever deep beams , it is an important kind of components in architectural structure which sustains roof trusses , brackets , tray " beams , frame " beams , wall " beams and crane " beams 剪跨比a h _ 0 1的短钢筋混凝土牛腿,其受力性能接近于悬臂深梁,在建筑结构中是支承屋架、屋面梁、托架、托架梁、框架梁、墙梁和吊车梁等的重要构件。
Supervision and consultation projects completed : ( 1 ) jiangsu xindadou square ( 50 , 000m2 , two 30 - story buildings ) , worked as chief supervision engineer ( consultation ) ; ( 2 ) " yanqiao overpass service center of xicheng highway ( the first overpass type service center on highway in china ) , worked as chief supervision engineer ( consultation ) ; ( 3 ) the ninth 5 - year - plan updating technology project of huaiyin tobacco plant , 50 , 000m2 , worked as chief ( supervision and consultation ) ; ( 4 ) the softy testing , analysis and consultations of nanjing international conference and exhibition center , site - erected structure , 75m span steel roof truss ( the largest one in china ) , worked as chief of test and consultation ; ( 5 ) " the consultation service of the testing , analysis and update technology of the reliability of the joints of intermediate floor slabs , beams and columns of base beam of sanshanjie station of nanjing metro " etc 完成"江苏新大都广场( 5万多平方米,二幢30层) "建设监理咨询(总监) ; "锡澄高速堰桥跨线服务区(国内首座) "建设监理咨询(总负责) ; "淮阴卷烟厂9 . 5技改项目( 5万多平方米) "建筑监理咨询(总负责) ;主持了"南京国际会展中心75m跨钢屋架(国内最大距)现场施工安装结构安全性测试分析咨询" ; "南京地铁三山街站中楼板及底板梁柱节点构造技术安全可靠性的测试分析与技术改进咨询服务"等项目。
For the first problem , these article firstly intruduce the national grading rule of u . s . a and then give a lot of detail about the mentions of the conformation and construction of foudation , basement , wall , floor and roof . additionally , the article illustrate how the wood - frame - construction house proofs the dame , the fire and the termite 对于第一个问题,在现场调研以及查阅相关文献的基础上,文章对美国的《国家等级标准》进行了介绍,同时对轻型木构小住宅的基础、地下室、墙体、楼地层、屋架屋面的构造做法、施工技术进行了详细叙述,另外对轻型木构小住宅的防虫、防潮、防火技术也进行了说明。
Cross - check the main roof truss roof installation quality of the surface is not perpendicular to the vertical center two blocks ; roof surface pressure chord of the roof truss vertical bending side , we must ensure that such errors do not exceed the allowable deviation to ensure roof stability and comply with the design requirements of the state by force 屋架安装质量主要检查屋架跨中对两支座中心竖向面的不垂直度;屋架受压弦杆对屋架竖向面的侧面弯曲,必须保证上述偏差不超过允许偏差,以保证屋架符合设计受力状态及整体稳定要求
Limited company of adornment of wall of hua guang act of lukewarm state city is with production , design , construction wall of large glass act , granite does the wall that hang act , aluminous model the building act wall such as board act wall and daylighting top , gauze wears project of project of roof tuss of project , light qualitative steel , steel structure , 97 people of existing worker , among them title of high school class 48 people , fixed assets many yuan 500 温州市华光幕墙装饰有限公司是以生产、设计、施工大型玻璃幕墙、花岗岩干挂幕墙、铝塑板幕墙等建筑幕墙及采光顶、金属网架工程、轻质钢屋架工程、钢结构工程、铝合金门窗、塑钢门窗等林型金属结构工程以及建筑内外墙涂料施工的专业公司,现有职工97人,其中高中级职称48人,固定资产500多万元。
The main work of this paper was as fellows : ( 1 ) generalized the development of pre - stressed steel structure in our nation and abroad , and pointed out the main problem in practice ; ( 2 ) presented the mechanism of pre - stressed steel structure and revealed its applicable range ; ( 3 ) established the optimization design model for pre - stressed steel structure , which accounts for constraints on stresses and displacements of structure ; ( 4 ) brought forward the optimization design method , which combined linear programming and the principle of full restriction , through which we can obtain the magnitude of each time pre - stress and the optimized sections of each members of structure ; ( 5 ) analyzed the best times of pre - stress and pointed out that 2 ~ 3 times is preferable ; ( 6 ) conducted optimization design on large - space steel roof , horizontal parallel steel truss with local cables , horizontal parallel steel truss with global cable , and ultra - static steel truss , the result of which indicated that the multiple pre - stress structure is very economic ; ( 7 ) compared different schemes of cable placement for horizontal parallel steel truss , and the results showed that the local cable only unloaded the second girders , but had no response on the first girders and stomach poles , while global cable could unload the second girders and the stomach poles outside of turning point of cable , thus proving that global cable is more economic than local - cable 本文的主要工作是:对国内外预应力钢结构的发展历史及现状作了综述和总结,指出当前预应力钢结构工程实践中存在的主要问题;阐述了预应力钢结构的受力机理,并指出预应力钢结构的适用范围和特点;在考虑结构应力和变位约束的条件下,建立预应力钢结构优化设计模型;提出多次预应力钢结构优化设计方法和步骤,采用线性规划和满约束准则相结合的优化方法,可优化设计出施加的每一级预应力的大小,并得到结构各部分的优化截面;对多次预应力最佳的施加次数作了分析,并建议以2 3次为宜;为验证文中理论和方法,分别对大跨多次预应力钢屋架、局部布索的水平平行弦钢桁架、整体布索的水平平行弦钢桁架和局部布索的超静定钢桁架等算例进行了优化设计,经济效益明显;对水平平行弦钢桁架的几种施加预应力的方案进行比较,对于局部布索,预应力只对下弦起到卸载作用,对上弦和腹杆基本不起作用;而整体布索预应力除对下弦卸载外,对索折点以外部分腹杆也起到卸载作用,经济效益好于局部布索。
This product is mainly used for prestressed and post - tensioning technology in large , medium and small sizes of various of pc structures , and widely used for civil engineering construction of large scale railroad , high - way bridges , buildings , truesses , overhead crane beams , industrial and civil prefabricated concrete floor , wall board , trbular piles , power line poles , power line poles , pc water pipes , tv towers and nuclear power station , etc 主要用于制作先、后张法的大、中、小型各种结构形状的预应力混凝土构件,如铁路、公路、屋架、吊车梁、工业民用预制板、墙板、管桩、电杆和预应力混凝土水管、电视塔、核电站等工程建设上。
The eye was , for a long time , wholly lost in this labyrinth , where there was nothing which did not possess its originality , its reason , its genius , its beauty , - - nothing which did not proceed from art ; beginning with the smallest house , with its painted and carved front , with external beams , elliptical door , with projecting stories , to the royal louvre , which then had a colonnade of towers 久而久之,目光深深陷入这迷宫里,把您也看得出神了,在迷宫里,从那门面雕梁画栋、外部屋架木头结构、大门扁圆、楼层悬垂的最末等的房舍,直至当时塔楼如列柱林立的富丽堂皇的卢浮宫,无一不是匠心独运,合情合理,才华横溢,美不胜收,无一不是艺术的结晶。