建筑用钢筋商品化加工配送发展浅析

介绍了建筑用钢筋商品化加工配送技术的内容、国内外现状及发展前景，重点分析了钢铁企业发展该项目的优势和需要注意的问题，并提出了相应建议。     

GFRP在大客车上的应用

介绍玻璃纤维增强塑料在大客车造型设计上的应用及其制造工艺的发展趋势。     

Durability issues of FRP rebars in reinforced concrete members

The use of fibre reinforced polymers (FRPs) as rebars in reinforced concrete (RC) elements is a viable means to prevent corrosion effects that reduce the service life of members employing steel reinforcement. However, durability of FRP rebars is not straightforward as it is related to material properties as well as bar–concrete interaction. A state of the art of durability of FRP rebars is presented herein in order to highlight issues related to the material properties and interaction mechanisms which influence the service life of RC elements. The design approach implemented in international codes is discussed and the reduction factors taking into account the durability performances are summarized.     

HRB335钢筋伸长率低的原因分析

分析Φ32HRB335钢筋在常规力学检验中出现伸长率低的原因。结果表明，Φ32HRB335钢筋伸长率过低是钢材中组织疏松引起的。     

冷轧扭钢筋基本性能和钢筋混凝土构件设计技术

介绍冷轧扭钢筋的基本性能以及冷轧扭钢筋混凝土构件的设计与施工的技术要求和特点，要求做到既符合国家标准的基本原则，又达到了节省材料和安全可靠的目的。     

结舟成舰 创造辉煌：武城县玻璃钢工业常胜不衰的奥秘

概述山东省武城县玻璃钢工业的发展概况，总结该县发展玻璃钢工业的经验，并提出今后的发展方向。     

Plate bending behavior of a pultruded GFRP bridge deck system

The bi-directional plate bending behavior of a pultruded GFRP bridge deck system with orthotropic material and system properties was investigated by means of two full-scale experiments and numerical modeling. Furthermore, the maximum span of the deck between two main girders was determined using Eurocode loading and presupposing a maximum deflection ratio of span/300.

Compared to an isotropic plate-strip, the bi-directional behavior of the orthotropic deck was not very pronounced. Nevertheless, selecting experiment specimen with five profiles instead of only three reduced the maximum deflections at the serviceability limit state (SLS) by ca. 50%.

Therefore, since the SLS governs in the design of GFRP bridge decks, the possible contribution of bi-directional plate bending is not insignificant and should be considered and improved in order to fully exploit the potential of pultruded GFRP bridge decks.     

基于DSP的欧元水印条码识别系统的研究

水印条码是欧元引进的新防伪点,它携带欧元纸币的特定信息,因此研究出一套准确,快速识别欧元防伪条码的检测方法是有其实际意义和应用前景。本文采用TMS320VC5409数字信号处理器、MSP430单片机为主要器件,基于实现对欧元水印条码进行有效、准确、快速识别的目的,设计一套识别系统。并且对做出的系统电路进行实验研究,对采集到的不同纸币的水印条码曲线进行分析,并将新的面值为50欧元纸币的水印条码采集曲线与其他纸币的采集曲线进行分析比较,计算其相关度。最后结合水印的自身特点,水印条码的退化现象,以及实验条件等方面分析相关度出现较低现象的原因。最后对实验结果的误差进行分析,提出下一步研究的重点。     

铸铝转子导条断裂数灰色判定模型的建立

根据灰色理论模型GM(1,1),建立了异步电机鼠笼式铸铝转子导条断裂数的判定模型,并通过计算实例说明该灰色判定模型精度较高、计算方法简单.     

Turning of glass–fiber reinforced plastics materials with chamfered main cutting edge carbide tools

In this paper, the machinability of high-strength glass–fiber reinforced plastics (GFRP) materials in turning with chamfered main cutting edge of P and K type carbide tools have been investigated experimentally. Chip formation mechanisms have been obtained with respect to tip's geometries and nose radii. Experimental results for cutting forces were also taken with GFRP as the workpiece material. Force data from these tests were used to estimate the empirical constants of the mechanical model and verify its prediction capabilities. The results show good agreement between the predicted and measured forces. In this study, the nose radius R = 0.3 mm induces a decrease of the cutting force and the smallest cutting force values was achieved in the case of C_s = 20°, _S1(_S2) = −10°(10°) and R = 0.3 mm. Comparing the different P and K type of tools, K type tool is better than P type of chamfered main cutting edge tools. The theoretical values of cutting forces were calculated and compared with the experimental results; the forces predicted by this model were consistent with the experimental values.