外套钢框架加层结构选型及应用研究

以某加层改造工程为背景,在满足安全、经济、方便施工,尽量不影响业主正常使用的前提下,通过对8种完全分离式外套钢框架加层结构的力学性能、耗钢量、施工难度、对业主影响程度等指标进行系统分析研究,为进一步设计提供依据,供类似工程参考。     

北16井区改善注水开发效果研究

针对北16井区构造复杂,储层非均质性强的特点。在油藏注水开发中,部分水井欠注,注采压差大,渗流阻力大等问题。采取了高压注水,分注,调剖等措施,以调整注采结构,完善注采系统。该措施实施后有效控制了含水上升速度,提高了注水波及系数,使得该区块注水开发效果得到改善。     

2205双相不锈钢的焊接工艺研究

在2205双相不镑钢焊接过程中,通过对焊缝金属和焊接热影响区内金属相变的分析研究,总结出了合理的焊接工艺。     

钢筋混凝土和钢纤维混凝土杂散电流腐蚀实验研究

依据地铁杂散电流对地下金属物质发生阳极氧化的电化学腐蚀机理,模拟了钢筋混凝土和钢纤维混凝土试件的杂散电流腐蚀实验。通过两种不同材料在相同的杂散电流环境中进行模拟腐蚀比较,分析了钢筋混凝土和钢纤维混凝土在抵制杂散电流腐蚀的耐久性和破坏形式方面的异同。结果表明,两种材料的耐久性能差异较大,破坏形式也不同,相同条件下,钢纤维混凝土的耐久性能显著降低。     

首都国际机场T3A主楼防雷、接地工程施工

介绍了首都国际机场3号航站楼T3A主楼,利用建筑结构构建防雷、接地体系,利用钢管柱柱内空间构建设备管路敷设通道,以及具有防水、屏蔽功能的罗盘箱的等电位联结。     

延安火车站站房及雨棚结构设计

该文介绍了延安火车站站房结构选型、大跨预应力混凝土结构和钢屋盖的设计,并重点介绍了站台雨棚张弦梁的设计、计算和构造做法。     

Mit Schrauben Bewehren – Neue Ergebnisse

Self‐tapping screws as reinforcement – new results. Self‐tapping continuously threaded screws can be used as elements for reinforcement or joints in timber construction because of their high axial strength and excellent bonding properties. The layout of the reinforcing or joining screws can be derived from strut‐and‐tiemodels which are common in concrete design and follow the internal flow of forces. Several series of tests in 2007 already showed the high potential of this construction method on various joint details and reinforced timber elements. Based on this success in 2008 further tests were taken out on joints and timber beams with altered and more sophisticated screw configurations. Hereby the load‐bearing capacity of timber beams reinforced with steel lamellas and rigid frame corners connected with self‐tapping screws was extraordinary and demonstrated once more the high potential of this design method.     

交联聚乙烯HIC在美国处置场应用实践及对我国的启示

简要介绍了从美国引进的交联聚乙烯高完整性容器(HIC)及其在美国Clive和Barnwell处置场的应用实践,对交联聚乙烯HIC在我国应用中存在的自由水含量、累积剂量、辐照分解气体、外包装等主要问题和解决思路进行了探讨,期望能对交联聚乙烯HIC在我国的处置方案的选择提供一些参考。     

A method of modeling residual stress distribution in turning for different materials

This paper introduces a more comprehensive experimental model which has the capability of predicting residual stress profile. The main advantage of this model over the existing models that it provides the effect of machining parameters on maximum residual stress and determines both the location and depth of this maximum residual stress. Five different materials namely; stainless steel-304, steel-37, 7001 and 2024-aluminum alloys and brass were machined by turning utilizing one of experimental design techniques based on response surface methodology. Tensile strength of these materials and both cutting speed and feed rates are considered as three input parameters affecting residual stress distribution. The residual stress distribution in the machined surface region was determined using a deflection-etching technique. It is proposed here that the residual stress profile is a deterministic function of the three input parameters used. Also, it is postulated that the residual stress profile along the depth beneath surface is a polynomial function of the depth beneath surface and the coefficients of this polynomial are, in turn, functions of the input parameters. The model has been developed and has been checked for accuracy.     

汽车用钢现状及其在邯钢的发展

伴随着汽车行业的快速发展,对汽车用钢的需求持续旺盛,国内汽车钢产量的发展进入高峰期。简要介绍了国内汽车钢的发展现状,对汽车钢的发展做了展望,结合邯钢汽车钢生产建设情况,阐述了邯钢汽车钢的品种研发情况。