受弯构件截面形状对工程造价的影响研究

通过对矩形、工字形、T形、圆形和环形等5种截面形状受弯构件进行对比分析,研究了不同截面形状对工程造价的影响.计算了T形受弯构件和环形受弯构件在不同截面尺寸比例下的抗弯截面系数,得出了承载性能随截面尺寸比例的变化规律,从而可通过调整受弯构件截面尺寸比例对工程造价进一步优化.     

钢筋混凝土受弯构件的塑性设计分析

推导出钢筋混凝土受弯构件无量纲形式弯矩与曲率之间关系的表达式，并绘制出相应的Ｍ↑－－Ｋ↑－曲线。对矩形截面受弯构件截面总转动能力和塑性转动能力进行详细分析，为钢筋混凝土结构塑性设计提供参考资料。     

现浇钢筋混凝土受弯构件加固补强简易方法

主要介绍现浇混凝土受弯构件造成承载力不足的原因,对混凝土受弯构件进行加固补强的理论基础,以及加固补强方法--体外配筋补强法的计算依据和注意事项.     

环形截面钢筋混凝土偏心受压构件正截面承载力计算实用方法

环形截面钢筋混凝土偏心受压构件正截面承载力计算会有求解超越方程的问题。本文提出了首先判断出方程解所在的区间,然后用平分法迭代解超越方程的方法。     

钢结构受弯构件挠度的容许值

在修订“钢结构设计规范））（GBJ17—88）构件变形一章时，作者曾作了大量的分析研究工作，对钢结构受弯构件，特别是吊车梁挠度、墙梁挠度容许值进行了探讨，本文提出了有关观点和结论，可供工程设计参考。     

不等肢L形截面钢筋混凝土双向压弯构件正截面承载力的研究

通过对不等肢L形截面的钢筋混凝土柱在不同的荷载角度时的正截面承载力进行非线性电算分析,揭示了不等肢L形截面双向压弯构件正截面承载力的变化规律。     

钢筋混凝土柱截面转换技术与应用

本文阐述了一种柱截面转换的方法,以适应上下楼层不同使用功能的要求,分析了由此引起的构造节点和层刚度的变化,并提出了解决的办法。     

关于钢筋混凝土施工技术的探讨

现代建筑对钢筋混凝土的施工要求越来越高,钢筋混凝土的灌注是每个工程最重要的环节,要求一次灌注,不间断浇筑。由于混凝土本身的属性,会受温度的影响,一段时间后会出现裂缝等问题,需要施工后精心养护。本文将简单介绍混凝土施工质量的控制,对一些问题提出一些改进的意见。     

钢筋混凝土结构的腐蚀与加固

以天津天铁冶金集团有限公司受腐蚀比较严重的铸铁机钢筋混凝土框架为例,分析了其腐蚀的原因和机理,介绍了对其采取的加固方法并提出了一些防腐蚀的措施。     

新型复合材料钢纤维混凝土的性能与应用

本文结合钢纤维混凝土的性能机理,对钢纤维混凝土多项性能进行分析,并根据钢纤维混凝土独特的性能,展望钢纤维混凝土应用前景。     

Confinement Effectiveness in Rectangular Concrete Columns with Fiber Reinforced Polymer Wraps

An innovative mechanistic based method for passive confinement efficiency estimation is proposed based on the extension to rectangular sections of the pulley model previously proposed by the writers. A refined finite element model was developed using a nonlinear concrete constitutive law in order to analyze stresses in columns passively confined with fiber reinforced polymer wraps. Rectangular and square cross sections of variable corner radii were investigated with reference to a circular cross section. Results showed an increase in corner stresses with sharper corner radii, a localization of failure at the corners, and a decrease in confinement effectiveness with an increase in the rectangularity of the cross section or an increase in corner sharpness. A rigorous numerical method for calculating geometric confinement efficiency factors is proposed and typical factors are calculated and compared with the predictions of the simple pulley model showing good agreement.     

钢筋混凝土结构火灾后性能及加固方法

文章讨论了火灾后钢筋、混凝土及钢筋砼材料性能及钢筋混凝土构件承载力、刚度变化,提出火灾后损伤评价方法及目前国内的加固方法。     

钢筋混凝土池及基础的爆破拆除

在龙口粉丝厂的技术改造中,利用水压爆破等一系列控制爆破技术,成功地将位于车间内的大型钢筋砼泡料池群以及由方立柱和平台组成的基础部分进行了拆除.     

Ductile Design of Reinforced Concrete Beams Retrofitted with Fiber Reinforced Polymer Plates

For reinforced concrete beams retrofitted with fiber-reinforced polymer (FRP) plates, an analytical method is derived for determining the allowable plate area to achieve a targeted value of ductility. Nonlinear models for concrete and reinforcement are applied, and the effects of concrete confinement and spalling and of FRP plate rupture are considered. The derivation of equilibrium and compatibility equations for a rectangular cross section is presented, and the solution to the nonlinear equation for determining the allowable plate area is demonstrated with examples. Analytical results are compared with numerical and experimental data reported in the literature. Subsequently a simplified version of the method is derived, based on regression analysis, to relate the curvature ductility to the FRP plate ratio. It is noted that additional conditions need to be checked to ensure ductile performance, such as local failure of the concrete layer between tension reinforcement and FRP plate or debonding of the plate itself.     

Analytical Model for FRP-Confined Circular Reinforced Concrete Columns

One disadvantage of most available stress–strain models for concrete confined with fiber-reinforced polymer (FRP) composites is that they do not take into consideration the interaction between the internal lateral steel reinforcement and the external FRP sheets. According to most structural concrete design codes, concrete columns must contain minimum amounts of longitudinal and transverse reinforcement. Therefore, concrete columns that have to be retrofitted (and therefore confined) with FRP sheets usually contain lateral steel. Hence, the retrofitted concrete column is under two actions of confinement: the action due to the FRP and that due to the steel ties. This paper presents a new designed-oriented confinement model for the axial and lateral behavior of circular concrete columns confined with steel ties, FRP composites, and both steel ties and FRP composites. Comparison with experimental results of confined concrete stress–strain curves shows good agreement between the test and predicted results.     

层布式钢纤维混凝土在旧路面补强中的应用

介绍层布式钢纤维混凝土的路用性能，结合井冈山市城区路网改造工程的设计、施工情况，阐述了层布式钢纤维混凝土在旧路面改造中的应用。     

钢骨混凝土偏压长柱受力性能试验研究

为了研究细长钢骨混凝土柱在偏心荷载作用下的性能,文章进行了10根钢骨混凝土偏心受压长柱的试验,主要变化参数为混凝土强度、试件长细比和荷载作用偏心距。主要研究了柱子的长细比、荷载作用的偏心距及混凝土强度对柱子承载力的影响。