基于ABAQUS的双T板极限承载力的非线性有限元分析

采用ABAQus有限元分析软件对双T板进行了极限承载力的非线性分析。对双T板在不同荷载作用下的受力情况进行了数值仿真,为进一步进行双T板的设计计算提供了参考。     

物联网在我国电梯行业中的应用与发展方向

介绍了电梯物联网的概念,分析了日本和中国电梯物联网的发展现状．重点研究了国内电梯物联网的发展方式,提出了我国电梯物联网的发展方向。     

钢铅粘弹性阻尼减震结构抗震性能分析研究

提出了钢铅粘弹性阻尼器,对钢铅粘弹性阻尼器构造进行了介绍,对阻尼器进行了性能试验.基于阻尼器试验结果,采用PERFORM 3D软件中的三线性模型对阻尼器单元进行模型,对布置钢铅粘弹性阻尼器结构和无耗能支撑的普通结构进行了多遇地震和罕遇地震作用下的非线性时程分析.分析结果表明:采用三线性模型模拟阻尼单元得出的滞回曲线饱满,与试验滞回曲线吻合的较好,分析时采用三线性模型模拟阻尼器的滞回性能是可行的;钢铅粘弹性阻尼减震结构的层间位移和剪力相比于普通结构都有明显减小,能较好地控制结构的地震反应;在罕遇地震作用时钢铅粘弹性阻尼器能吸收大量地震输入结构能量,减小结构构件产生的塑性变形,保护主体结构安全.     

装配整体式空间钢网格盒式结构在多层大跨工业厂房中的应用

贵州省瓮安县创业园钢结构厂房工程采用装配整体式空间钢网格盒式结构,盒式结构是由钢网格承重式墙架和钢空腹夹层板楼盖结合形成的。采用以层为单位、以单元组装墙架和楼盖的形式来完成多层工业厂房的建设。此种新型结构体系具有用钢量小、跨度大、施工速度快、施工文明的特点。详细介绍了此种新型结构体系的设计要求和施工工艺,对相关工程设计有一定的借鉴作用。     

既有屋面防水喷涂聚脲整体翻新技术

我国既有屋面防水改造面临工作量日多,且无相关技术规范、完善的系统设计以及适用的材料等问题,喷涂聚脲防水涂料性能优异,以它为主构建的无缝防水体系适用于各类屋面,工程防水效果显著、施工简便。     

硅酮密封胶中矿物油增塑剂的应用及其检测方法研究

介绍了国内建筑硅酮密封胶中矿物油增塑剂的品种、性能和应用情况,分析了滥用矿物油增塑剂产生的危害,概述了基于热失重方法定量检测硅酮密封胶中矿物油增塑剂含量的研究结果,提出了改进检测方法包括选择较高试验温度和较长加热时间的建议.     

肇庆高新区垃圾中转站项目全过程造价管理实践

搞要:通过肇庆高新区垃圾中转站项目建设管理实践,探讨建筑工程项目各阶段造价管理的特点和重点,其中决策阶段重点是加强对项目建议书及可行性研究报告投资估算的审核和审批;设计阶段是加强对初步设计总概算和项目预算书的审定;招投标阶段是确定合理的控制价,完善合同条款;施工实施阶段是控制材料价格,减少设计变更;竣工验收和项目后评价阶段是加强对竣工结算的审核等。本文的经验可为建设工程项目管理提供一些借鉴。     

Preparation of a novel chelating resin bearing amidinothiourea moieties and its removal properties for Hg(II) ions in aqueous solution

A novel chelating resin bearing amidinothiourea (ADTU) moieties was prepared by chloroethyl crosslinked polystyrene (CMPS) with ADTU in the presence of a phase transfer catalyst. Fourier transform infrared spectra (FT-IR) and scanning electron microscopy (SEM) were used to characterized the resulting chelating resin. The saturated adsorption capacity of Hg(II) ions estimated from the Langmuir model was up to 1215 mg g^?1at 313 K. Furthermore, the resin was able to selectively separate Hg(II) from multicomponent solutions with Cd(II), Co(II), Cu(II), Zn(II), Mg(II) and Pb(II). The desorption process showed the mercury recovery reached to 99.2% under eluting condition of 1 M HCl + 8% thiourea.     

Preparation and characterization of the modulus intermediate layer in carbon fiber/epoxy composites by depositing sepiolites

An important aspect in development of multi‐scale reinforced composites is their mass production which can be easily realized. In this article, the sepiolites (Si12O30Mg8(OH)4(OH2)4·8H2O) are directly deposited onto the surface of JH‐T800 carbon fibers for the first time with no need for removal of the commercial sizing agent. The sepiolites adhering to the carbon fibers are uniformly distributed with random orientation, and participated in the formation of high modulus intermediate layer encompassing the carbon fiber. After the deposition of sepiolites, the interfacial shear strengths (IFSS) of the carbon fiber/epoxy composites are significantly improved as shown in single‐fiber composite fragmentation tests. Compared to the commercial carbon fiber composites, the sepiolite‐deposited fiber composites also exhibit obvious improvement in the interlaminar shear strength and flexural strength. As a new kind of multi‐scale reinforcement with industrial application value, the sepiolite‐deposited carbon fibers can further raise the level of mechanical properties of the existing carbon fiber reinforced composites. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43955.     

High‐performance polymer‐supported extractants with phosphonate ligands for scandium(III) separation

As the market demand for scandium has grown, a great deal of interest has been generated in its recovery. To substantially simplify the process and provide a green alternative for scandium separation, novel polymer‐supported extractants containing di(2‐ethylhexyl) phosphonate and bis(2,4,4‐trimethylpentyl) phosphonate, [D201][DEHP] and [D201][C272] are proposed because they demonstrate improved adsorption capacity and selectivity toward scandium(III). Scandium(III) adsorption is significantly affected by the solution pH, with the maximum adsorption occurring at a pH of approximately 0.78. The batch adsorption data fit well with the Langmuir isotherm and pseudo‐second‐order kinetic models. A combination of the Fourier transform infrared and XPS spectra suggest that the complexation of oxygen atoms in phosphate groups with scandium(III) is the predominant adsorption mechanism. Additionally, the two resins were used to recover scandium from leaching liquor of nickel laterite ore. [D201][DEHP] exhibits unusual selectivity for scandium and low competitive behavior with other metals, thus increasing its market potential. © 2016 American Institute of Chemical Engineers AIChE J, 62: 2479–2489, 2016