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压杆-拉杆模型是复杂钢筋混凝土结构设计的标准方法之一,但很少扩展到浅梁的设计。钢筋混凝土梁压杆-拉杆模型的建立方法很多,但由这些方法得到的压杆-拉杆模型是否能反映结构最本质的受力状况尚无定论。该文采用寻优能力强的拓扑优化算法——遗传演化结构优化算法(GESO)来构造钢筋混凝土梁的压杆-拉杆模型,同时为了确保所得结果的最优性,采用经典的Michell准则和试验方法判断和解释GESO算法的计算结果。该文以跨高比从7变化到1的简支梁和两跨连续深受弯构件为例证明了采用GESO算法能构造满足Michell准则的钢筋混凝土梁压杆-拉杆模型,由该文总结出的钢筋混凝土梁的压杆-拉杆模型的规律有助于设计类似构件。
Pressed rod - Tie rod model is one of the standard methods for the design of complex reinforced concrete structures, but rarely extends to the design of shallow beams. There are many ways to set up the bar-rod model of RC beams. However, it is inconclusive whether the model of the rod-rod model obtained by these methods can reflect the most essential force of the structure. In this paper, the optimal optimization algorithm of genetic optimization algorithm (GESO) is used to construct the bar-rod model of reinforced concrete beams. In order to ensure the optimality of the obtained results, the classical Michell criterion and experiment Method to judge and explain the calculation result of GESO algorithm. In this paper, the simple beam and the two-span continuous deep bending member with span ratio varying from 7 to 1 are taken as an example to demonstrate that the GESO algorithm can be used to construct the bar-rod model of reinforced concrete beam that meets the Michell criterion. The law of the rod-rod model of reinforced concrete beams helps to design similar components.