无粘结预应力锚索在岩质边坡支护加固工程中的应用

首先将无粘结预应力锚索与普通锚杆（索）在边坡支护加固中的性能进行了对比分析,并以大连某大型岩质边坡支护加固工程为实例,分析总结了无粘结预应力锚索在岩质边坡支护中的设计方法、关键施工技术。     

分段前进式超前深孔注浆地层预加固技术

介绍了分段前进式超前深孔注浆和TGRM分段前进式超前深孔注浆工艺的构成与特点,并用北京不同地层条件下的工程实例,进一步显示了该工艺适合在北京绝大部分地层注浆施工、注浆材料性能针对性强、机械设备成本费用低、工程质量有更大的安全系数、更环保的特性。     

日本年轻建筑师的现状——1960年代的这一群

一人脉对照 1 日本现代建筑师溯流 引领日本现代建筑进人成熟时期的领袖人物非丹下健三莫属。由师从丹下的模文彦（1928年-）、黑川纪章（1934年-）以及大高正人（1923年-）、菊竹清训（1928年-）等4人在1960年代创导的新陈代谢运动，使主流的欧美建筑界开始认真关注一个亚洲的小国——日本的建筑活动。可以说新陈代谢运动是日本现代建筑发展的基石也是随后其建筑发展的原动力。     

《中国建筑文化之西渐》的研究框架

《中国建筑文化之西渐》系“中国建筑文化研究文库”的第26号专著。该文介绍了国内外在中国建筑文化西传史领域的研究状况，以及作者在资料零散情况下所采用的研究方法和在专题选择、时期划分等方面的特点，探索了一些新的史学方法在比较建筑史领域的应用。     

Sorbed atrazine shifts into non-desorbable sites of soil organic matter during aging

Soil-chemical contact time (aging) is an important determinant of the sorption and desorption characteristics of the organic contaminants and pesticides in the environment. The effects of aging on mechanism-specific sorption and desorption of atrazine were studied in soil and clay slurries. Sorption isotherm and desorption kinetic experiments were performed, and soil-water distribution coefficients and desorption rate parameters were evaluated using linear and non-linear sorption equations and a three-site desorption model, respectively. Aging time for sorption of atrazine in sterilized soil and clay slurries ranged from 2 days to 8 months. Atrazine sorption isotherms were nearly linear (r(2)>0.97) and sorption coefficients were strongly correlated to soil organic carbon content. Sorption distribution coefficients (K(d)) increased with increase in age in all five soils studied, but not for K-montmorillonite. Sorption non-linearity did not increase with increase in age except for the Houghton muck soil. Desorption profiles were well described by the three-site desorption model. The equilibrium site fraction (f(eq)) decreased and the non-desorbable site fraction (f(nd)) increased as a function of aging time in all soils. For K-montmorillonite, f(nd) approximately 0 regardless of aging, showing that aging phenomena are sorbent/mechanism specific. In all soils, it was found that when normalized to soil organic matter content, the concentration of atrazine in desorbable sites was relatively constant, whereas that in non-desorbable site increased. This, and the lack of aging effects on desorption from montmorillonite, suggests that sorption into non-desorbable sites of soil organic matter is primary source of increased atrazine sorption in soils during aging.     

A numerical imperfection sensitivity study of cold-formed thin-walled tubular steel columns at uniform elevated temperatures

A numerical study is carried out on cold-formed rectangular hollow section columns to evaluate the sensitivity of column failure strength to initial imperfections, stress–strain relationships and to assess the existing design methods. It is shown that the magnitude of initial local buckling imperfection has a significant effect on the ultimate strength of short columns where failure is predominantly local buckling. Its effect on long columns is relatively small. Similarly the magnitude of initial global imperfection has more influence on the ultimate strength of a long column, whose failure is governed by global buckling, than on short columns, where local buckling controls. The shape of the stress–strain relationship of cold-formed steel will have noticeable effect on the column failure load. Current design methods, for high temperatures in ENV1993-1-2 and for ambient temperature in ENV1993-1-3, can provide a valid basis of calculation but modification will be necessary, depending on the exact model of stress–strain relationship of cold-formed steel at elevated temperatures.     

锚焊U形钢板加固钢筋混凝土梁的抗弯性能研究

设计了3根锚焊U形钢板加固的混凝土梁试件,并进行了四点弯曲加载试验,获得试件的破坏形态、荷载-挠度曲线、钢板和混凝土界面滑移情况以及各材料在加载过程中的应变发展情况,分析了加固梁的受力模式.采用有限元软件ABAQUS分析配筋率、抗剪螺栓间距、抗屈曲螺栓数量和钢板厚度对加固梁性能的影响特征和变化规律.试验结果表明,锚焊U...     

高层建筑电气设计中低压配电系统安全管理

现如今,随着城市化进程的不断加快,高层建筑的规模也在不断扩大,其不仅满足了人们的住房需求,而且也提升了城市的整体形象.要想进一步提高高层建筑的功能作用,就要以用电安全为基础,对高层建筑低压配电系统的安全设计和管理给予高度的重视.结合当前高层建筑电气设计中常见的几种低压配电系统类型以及在运行过程中诱发安全事故产生的主要原...     

无支撑支护前排倾斜双排桩内力变形性状

以武汉长江Ⅰ级与Ⅱ级阶地过渡区某深基坑采用前排倾斜双排桩支护为例,整理了桩身水平位移监测资料并分析了其发展规律,同时又进一步建立有限元数值模型,分析了开挖过程中桩身位移与弯矩的发展规律.研究结果表明,倾斜双排桩相较于常规双排桩有一定的优越性.     

应急传染病医疗设施建造综述

将新冠肺炎疫情期间应急救治临时医疗用房项目所采用的集装箱箱式房建筑,与SARS疫情期间建造的小汤山医院的建筑进行了对比.从建筑形式、基础类型、封堵工艺、屋面工艺、立体穿插思路、BIM技术应用和集装箱规格尺寸等方面,研究了应急传染病医疗设施在工程建造方面的进展,整理了集装箱箱式房的相关标准,并对应急传染病医疗设施建造的未...