普通钢筋混凝土结构设计中应注意的若干问题

简要介绍了普通钢筋混凝土结构设计中结构计算模型的建立、梁板计算模式的确定以及计算参数的取值等几方面应注意的问题，提出了相应的处理方法和要求。     

某高层住宅楼转换层施工案例分析

讨论了厚板迭合层的几种施工方法，并对其中二次迭合成型施工法进行了详细的论述，通过具体案例分析，进行了技术经济比较，为类似工程的应用提供了参考。     

剪力环对钢管混凝土粘结强度影响的试验

通过对3根设置剪力环，3根不设剪力环，直径相同、厚度相同的试件进行研究，分析了钢管与混凝土之间的粘结性能、破坏机理，探究了影响其强度的主要因素．     

钢筋混凝土旧桥常见病害产生原因及防治

根据对十余座桥梁检测情况以及相关献，论述了既有钢筋混凝土桥梁常见病害情况，分析了病害的发生原因。并提出了初步防治建议，它涉及确定既有钢筋混凝土桥梁的技术状况，采用相应的加固、改善措施，确保既有桥梁的安全性等方面。     

混凝土斜裂纹损伤断裂分析

混凝土构件中宏观裂纹尖端附近，伴随有损伤，随着损伤的发展，微裂纹集度不断增大，合并形成宏观裂纹，本文将Mazars混凝土损伤模型应用于混凝土断裂分析中，带斜裂纹的构件受拉应力作用时，将产生Ⅰ、Ⅱ型复合裂纹．本文分析了宏观裂纹尖端附近区域的损伤，所得结果与最大拉应力理论的结果比较相符。     

钢管混凝土的等效本构关系研究

在总结现有钢管混凝土本构关系分析的基础上,将钢管混凝土简化为同一尺度的横观各向同性体来研究,并在弹性条件下利用应变能相等原理得到了宏观弹性系数,同时根据试验结果假设进入弹塑性阶段后各模量为二次抛物线变化,建立了钢管混凝土这种组合结构新的等效本构关系.并结合具体算例研究了弹性条件下材料强度变化和含钢率对各模量的影响,同时与前人的研究结果进行了比较,结果表明,该本构关系具有理论依据明确,参数易确定,能很好地反映组合构件材料物理性能的优点,为钢管混凝土结构进一步进行数值分析奠定了基础.     

轴向压力下刚性支承矩形钢板件屈曲弹性分析

通过对钢管混凝土中外包钢管板件的屈曲弹性分析，目的在于研究钢管内填混凝土后钢板件的抗屈曲能力．在钢管混凝土中，核心混凝土可以被看作刚性材料；对于组成钢管的矩形钢板件而言，当其与刚性材料并置时钢板的屈曲仅发生外凸．根据小挠度理论，用迦辽金方法计算具有刚性支承的矩形板件的弹性屈曲，并得到了屈曲系数k．计算结果表明：由于核心混凝土的存在，钢管抵抗屈曲的能力比无内填混凝土的空钢管抵抗屈曲的能力有显提高．     

Calculating the elastic moduli of steel-fiber reinforced concrete using a dedicated empirical formula

The equivalent inclusion method (EIM) is adopted to study the characteristics of the equivalent material properties of steel-fiber reinforced concrete as a function of the volume fraction and the length to diameter ratio of the fibers. It is found that the equivalent material moduli of concrete reinforce with randomly orientated and distributed fibers are insensitive to the length to diameter ratio of the steel fibers. A set of empirical formulae is then proposed for the purposes of engineering applications. The proposed empirical model can simplify the calculation of the equivalent material moduli. Verifications of the proposed empirical formulae with the EIM model and with experimental data are performed with two examples. The first is a compression test. The second is 4 point bending test. The empirical formulae, based on the equivalent inclusion method proposed in this study, represent an alternative means of quickly calculating the effective elastic modulus of steel-fiber reinforced concrete materials.     

Escapable Conclusions: Toomela (2003) and the Universality of Trait Structure.

A. Toomela (2003) concluded that personality structure may be shaped by a cultural mechanism, word meaning structure, and that the apparent universality of the Five-Factor Model (FFM) was the result of inadequate sampling of concrete thinkers. A reanalysis using targeted rotation showed that the intended structure was generally replicated; small deviations in the most concrete thinkers were probably due to measurement error. The reanalysis authors found no evidence of structural differences in a second sample of adults classified as concrete or abstract thinkers. The FFM structure has been replicated in many samples containing individuals with cognitive or educational limitations; observer ratings may be preferred if these limitations are severe. To date, there is no compelling evidence that culture affects personality structure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of superstructure flexibility on strength of reinforced concrete bridge decks

This research studies the impact of the relative rigidity between the concrete bridge deck and the remaining structural components of the bridge superstructure on the behavior of the concrete deck. The study uses non-linear 3-D FEM models, which are developed using ANSYS 5.7 software package. Experimental data from one-span non-composite bridge superstructure are used to validate and calibrate the proposed FEM models. A series of parametric studies is conducted with respect to three parameters: (a) composite action, (b) slenderness ratio, and (c) presence of diaphragms. The analysis results are discussed in detail and conclusions on the behavior of the bridge deck are presented.