| 刘霞,易伟建.钢筋混凝土平面构件的配筋优化[J].计算力学学报,2010,27(1):110~114 |
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码上扫一扫！ |
| 钢筋混凝土平面构件的配筋优化 |
| Reinforcement layout optimization of RC plane components |
| 投稿时间：2008-01-23 修订日期：2008-11-22 |
| DOI：10.7511/jslx20101018 |
| 中文关键词: 钢筋混凝土构件 结构优化设计 拉压杆模型 配筋优化 |
| 英文关键词:reinforced concrete structural optimization strut-and-tie model reinforcement layout optimization |
| 基金项目:国家自然科学基金(50908082)资助项目. |
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| 摘要点击次数: 1886 |
| 全文下载次数: 1961 |
| 中文摘要: |
| 钢筋混凝土D区构件由于不满足平截面假定,以往多采用试验加经验的方法进行配筋设计,误差较大,结果多偏于保守。由于钢筋混凝土构件是由钢筋和混凝土两种材料组成的复合构件,它的工作本质可抽象为由混凝土压杆和钢筋拉杆构成的、形状自由的拉压杆模型。引入一种新的结构优化方法"遗传演化算法"建立反映构件最实质工作机理的拉压杆模型,在所获拉压杆模型的指导下,拉杆位置布置受拉钢筋,压杆位置认为由混凝土承担,完成钢筋混凝土D区构件的配筋设计。首先以一根钢筋混凝土简支深受弯构件为例证明这种方法的可行性,根据所求得的拉压杆模型配置的钢筋数量少于现行规范用量。另外这种方法还被证明能方便地找到包括钢筋混凝土简支深受弯构件、牛腿、框架节点等典型D区构件的拉压杆模型,并据此给出相应的配筋指导。 |
| 英文摘要: |
| Plane section assumption is not suitable for D-regions in reinforced concrete structure whose reinforcement layout design is often directed by experiment results and experience which induces some error and conservative results to the reality design. Reinforced concrete is a composite material and it works as a strut-and-tie model made of concrete compressive rods and steel tensile bars. A new optimal method named genetic evolutionary algorithm is used here to build the strut-and tie model reflecting the mechanic characteristic of reinforced concrete structures Concrete rods are appointted to the places of strut and steel bars are appointted to the places of tie according to the strut-and-tie model. A simply supported deep beam was quoted here first to finding its strut-and-tie model and corresponding reinforcement assembly. The total areas of resisting reinforcements determined by strut-and-tie model were less than that determined by the active code. The new method was also determined to design some representative structures like corbels and beam-column connections conveniently. |
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