钢筋混凝土平面框架结构的破坏过程分析-结构工程专业论文.docxVIP

钢筋混凝土平面框架结构的破坏过程分析 摘 要 本文提出了一个适合实际应用的钢筋混凝土框架结构的破坏过程模型，通过改进计 算结构软科学的基本算法实现了分析结构破坏过程的算法，以此为工具跟踪了一些结构 的破坏过程并得出这些结构的实际安全度。 本文分析研究了钢筋混凝土杆件的软科学特性，把钢筋混凝土杆件截面的力学性质 简化为两个阶段并采用塑性铰模型作为杆件截面进入非线性后的宏观模型。在此基础 上，本文认为结构破坏的机制是由于塑性铰的产生导致结构的超静定次数减少最终成为 崩塌机构。 针对这个结构破坏模型，本文提出广义单元刚度阵的概念改进了传统的杆件结构计 算力学理论，并介绍了运用渐进累计破坏过程分析方法作为结构破坏过程的分析策略。 文中详细讨论了影响塑性铰出现的因素以及塑性铰的有哪些信誉好的足球投注网站对策。对于程序实现中的一些 关???技术，文中也作了重点介绍。最后，本文运用所提出的分析方法对复杂荷载作用下 的复杂结构的破坏过程进行了分析。 关键词：塑性铰，广义单元风度阵，渐进累计破坏过程  THE ANALYSIS OF THE DNMAGE PROCESSES OF THE PLANE R．C．FRAMEWORK Abstract The paper proposes a model ofthe damage processes ofreinforced concrete ffameworks， and give the algorithm of the model by improving the traditional structural analysis method． Through this way,the damage processes of some structures are traced、Ⅳim safety level evaluations． The paper studies the mechanical properties of reinforced concrete beams，and simplify the properties as bi—linear model and adopt the plastic hinge when the section come to yield． Based on this，the collapse mechanism of a structure is that the occurrence of plastic hinges lead to the reduction ofthe degree ofthe statical indeterminancy ofthe structure． According to this damage model，the paper proposes the concept of the generalized element stiffness matrix to improve the tradional structural analysis theory,and then the analysis method of successive cumulative damage processes is in仃oduce．The factors influencing the occuTTence ofplastic hinges and the searching strategy of new plastic hinges are discussed in detail and the key techniques in programming are also emphasized．Lastly,a complicated structure subjected to complicated loads is analysed through the approach presented in the papers． In addition．the problems conceming programming with C抖language for structttral analysis are also discussed． KEYWORDS：Plastic analysis，generalized element stiffness matriX，successive cumulative damage processes of structure． II  符号说明 厂v：钢筋屈服强度，M·Pa／m2 E，：钢筋弹性模量，M·Pa／m2 正：混凝土强度，M·Pa／m2 E。：混凝土弹性模量，M·Pa／m2 2 A∥