钢丝网架轻质墙板在房屋墙体工程中的应用

文章结合湖南信托大厦高层框剪结构工程概况,介绍了钢丝网架墙体施工技术的工艺流程,对其施工要点进行了详细阐述,并对该墙体工程进行了经济效益分析。结果表明,该板是理想的轻质节能墙体材料,对取代传统的粘土砖建筑有着积极的作用。     

轴心压力对Y型偏心支撑钢框架抗震性能的影响

偏心支撑钢框架是在支撑钢框架的基础上改进的一种新型抗侧力体系,该体系结合了中心支撑钢框架强度、刚度高和抗弯框架延性、耗能性能好的优点,是适用于高烈度地震区的一种有效的抗侧力结构体系。同时,由于多高层钢框架的广泛应用,其层数不同将会导致柱轴心压力的不同。本文通过应用ANASYS有限元程序对其在不同轴心压力下的受力性能进行分析。     

复杂海域环境下钢栈桥的设计与验算

沿海路改桥项目施工过程中常规的施工便道及施工平台无法满足桥位处复杂的海域环境要求,而复杂海域环境下钢栈桥结构常年经受大风及波浪冲击作用,结构受力复杂,需要进行特殊设计与验算。本文在已有研究成果的基础上设计了复杂海域环境下钢栈桥搭建方案,考虑钢栈桥在正常使用和台风期停工两种施工情况,采用Midas/Civil建立钢栈桥有限元分析模型,进行了多种典型工况下主要构件应力、钢管桩桩底反力及钢管桩嵌固点的验算。验算结果表明设计的钢栈桥满足项目施工要求,作为临时通道能够有效的解决桥梁的施工作业问题,对复杂海域环境下钢栈桥的设计与验算具有借鉴意义。     

钢铁工业发展周期及中国钢产量饱和点预测

通过对美国、日本钢铁工业发展阶段的分析和产量曲线拟合,总结钢铁工业发展规律,验证产业生命周期理论的可行性。基于目前我国钢铁工业处于成长期向成熟期过渡阶段的判断,使用产业生命周期曲线拟合预测,得到中国粗钢产量预计在2020年前后达到饱和,饱和值水平约7.7~8.5亿吨。     

利用钢结构建筑残值证券化实现钢铁资源储备

在地球资源枯竭之前,为了国家在未来的国际资源争夺战中占领制高点,应未雨绸缪对资源实现大规模的战略储备。当前,利用我国建筑业高速发展机遇期,大规模推广钢结构建筑以求较大规模钢铁集中消耗形成＂藏钢于屋＂即可实现钢铁资源的战略储备,这样一种储备不会影响钢铁资源在建筑中使用价值的发挥,从而规避了＂冬眠＂式储备。钢结构建筑成本高是制约其发展的瓶颈,根据钢结构建筑中钢材易集中回收以及残值较高的特点,文章提出了钢结构建筑残值证券化的新概念。采用钢结构建筑残值证券化手段,可以让证券持有人在分享因资源枯竭或通货膨胀带来的丰厚收益的同时分担高昂的建造成本,从而能够使国家以超低成本或零成本实现大规模钢铁资源战略储备。     

Sewers,wastewater and newspapers: the early environmental debate on water pollution in Turku,Finland, 1887–1934

Abstract

A century ago, city dwellers became increasingly aware of urban environmental problems caused by the waste products of industry and the growing population. Like elsewhere in Europe, water pollution became an acute issue also in the city of Turku, in south west Finland, The sewer system built after 1895 discharged all the municipal and rapidly increasing industrial wastewater untreated into the River Aura in the centre of the city, As a result, the quality of the river water worsened rapidly, and the first complaint on this was published in the local newspaper in 1899. In this study we document the press debate on river water quality and wastewater problems in the local newspapers of Turku for the period from 1887 to 1934, when the plan for a wastewater treatment plant was finally completed (the plant was, however, not built until 1966). The failure of the city administrators to present any solution to the river pollution problem caused the first major public environmental debate in the city at the turn of the 20^th century. Our results show that (1) sewers were recognized by newspapers as the primary cause of worsened river water quality, (2) the necessity of a wastewater treatment plant was understood long before the actual plan was drawn up, (3) the local industries were hardly ever criticized in public for water pollution, and (4) the initiative for improvements was considered to be the responsibility of the city administrators. The debate in the local press was often hectic, many decades before the 1960s, when the environmental debate is commonly said to have started.     

精细化管理在油气输送钢管制造企业中的构建与实施

论述了以＂五精四细＂为模式的精细化管理在渤海石油装备华油钢管公司内的构建和实施。详细阐述了＂五精四细＂的基本内涵,即五精之精化、五精之精髓、五精之精品、五精之精通、五精之精密、四细之细分、四细之细密、四细之细化、四细之细则。通过实施精细化管理,企业管理水平得到全方位提升     

加强对水工钢闸门的管理与维护

防腐、防漏、防振是水工钢闸门日常管理和维护的主要内容，针对闸门操作频繁而由非专职人员来管理的情况，介绍了对水工钢闸门的常用管理与维护方法。     

钢框架结构设计简介

阐述了钢框架结构的应用领域及优缺点,对钢框架的设计方法及设计过程做了简述,最后得出钢框架的设计心得。     

The Gradual Response of Market Power to Mergers in the U.S. Steel Industry

Studies of the impact of horizontal mergers on market power typically impose an immediate adjustment of market power following a merger. This paper adopts an alternative procedure to estimate the effect of four mergers on market power in the U.S. steel industry. Namely, by estimating a switching regression model that incorporates profit-maximizing behavior, the results show that mergers generally increased market power in the steel industry. However, it did take some time for market power to fully adjust after each merger.