上海新国际博览中心钢结构安装技术

新国际博览中心是铸钢件管桁架柔性支撑体系，在安装中首次采用了台车胎架空中组装，地面滑移的施工新工艺，本介绍了现场组装焊接和安装技术要领，并对预应力杆的张拉技术和结构体系的关系作了探讨和总结，以供设计和施工参考。     

基于S3C4480单片机的数字化预应力张拉仪系统的设计

文中以三星S3C4480嵌入式微处理器作为硬件平台，通过移植嵌入式操作系统uClinux，实现对预应力张拉工艺的自动控制．该张拉仪具有精度高，实时性好，操作简单，显示直观，能自动生成并打印施工报表的优点、     

Fatigue behavior of RC beams strengthened with prestressed NSM CFRP rods

The fatigue performance of Reinforced Concrete (RC) beams strengthened using NSM CFRP rods was examined in this study. The testing matrix consisted of one un-strengthened beam and four beams strengthened using NSM CFRP rods prestressed to effective strain values of 0, 3260, 6899, and 9177 μ representing 0%, 20.4%, 43.1%, and 57.4% of the CFRP rod ultimate tensile strain, 1.6%. All beams were tested in four-point bending under fatigue conditions representing in-service loading for 3 million cycles at a frequency of 2 Hz. Upper and lower load limits were chosen to induce a stress range of 125 MPa in the tension steel during the first cycle. The fatigue results were compared with experimental test results of identical beams strengthened using prestressed NSM CFRP strips tested under identical fatigue conditions found elsewhere in literature. Test results showed that all strengthened beams experienced deflection increase lower than that of the un-strengthened beam which indicates the efficiency of the strengthening process in reducing the damage accumulation. Also, the percentage deflection increase as well as the stiffness degradation after 3 million cycles are almost the same for all the strengthened beams which indicates that damage accumulation is independent from the prestress level. The groove dimensionality, rather than the CFRP geometry, has a detrimental effect on the bond behavior.     

预应力锚索双层电隔离防护技术研究

介绍了预应力锚索电隔离防护技术及其测试方法,进一步研究了锚索双层电隔离防护技术的主要结构特点和技术性能,进行了锚索室外长期电隔离防护性能监测和我国台湾现场测试。研究结果表明采用环氧喷涂钢绞线和锚索波纹管组合的OVM双层电隔离防护锚索在潮湿等恶劣工况下能有效实施电隔离防护,其永久防护的隔离电阻值满足欧洲标准的要求。     

预应力混凝土空心板的极限计算方法与程序开发

采用预应力混凝土空心板的正截面承载力控制、裂缝控制及挠度控制状态下的极限计算方法和应用 Ｖｉｓｕａｌ Ｂａｓｉｃ ４． ０开发的计算程序,合理地优化了预应力混凝土空心板的设计方法,既节省钢材又提高了设计质量可供编制预应力混凝土空心板图集时参考。     

The simple model of cell prestress maintained by cell incompressibility

Living cells are reinforced by polymer fibers (the so-called cytoskeleton) which are responsible for their mechanical behaviour. There are many evidences that these fibres are prestressed without an external load. To include this prestress into mechanical models of living tissues is not an easy task. We propose an approach in which the intracellular prestress is maintained by the incompressibility of cells. A simple illustrative structure is studied in order to determine the dependence of stiffness on the level of prestress. Some macroscopic models of living tissues with prestressed cells are formulated. The results show a clear dependence of the macroscopic mechanical response on the level of prestress at microscale. The model exhibits some features of living cells (prestress-induced stiffening, strain hardening).     

预应力锚杆在加固围岩施工中的应用

本文详细介绍了一种新型结构的预应力锚杆的设计思想、结构原理、加工方法、施工程序及应用成果 ,实践证明该新型预应力锚杆在锚固工程中有着广泛的应用和发展前景     

预应力损失估算及控制措施

介绍采用分项法计算预应力损失的估算方法 ,并根据预应力损失原理提出控制预应力损失的几项措施 ,从而指导预应力结构的设计及施工     

钢带缠绕预应力模具缠绕过程的数值模拟

针对钢带缠绕预应力模具的缠绕过程,开展了定张力条件下缠绕过程的数值模拟,解决了模拟中出现的壳单元接触、沙漏现象、钢带抖动等方面的问题.根据研究结果发现,随着缠绕层数的增加,模具表面预紧力增长的速度减小;预紧力在轴向方向分布具有不均匀性,中间位置数值最大,由中间向两端逐渐减小,存在端部效应;圆周方向预紧力出现波动,且波动随缠绕层数的增加愈加剧烈;模具内表面节点径向位移比外表面大.     

焊接高强钢盖板的预应力钢梁的构造与实践

焊接高强钢盖板的预应力钢梁构造简单，刚度较大，节约钢材，是一种值得推广的结构型式。本介绍了这类预应力钢梁制造方法和计算方法，并通过工程实例说明其应用方法和经济效果。