基于PKPM仿真的地下室框架梁经济性研究

Economics Research of Basement Frame Beam Based on PKPM Simulation

通过对单位体积混凝土、单位体积钢筋造价目标函数的建立,结合双筋截面梁的计算式及其假定,并对双筋截面梁的计算式进行推导演变,最终得出双筋截面梁的极优经济配筋率指标。接着采用PKPM软件对两层纯地下室进行建模模拟(采用16宫图),并对该模型的地下室顶板梁的不同截面尺寸进行试算,然后对试算的结果进行统计分析,验证了双筋截面梁的极优经济配筋率指标的正确性。该思路的提出为建筑结构设计人员对经济性梁截面的设计提供了参考,为房地产开发企业评估设计公司的设计成果提供了依据,也为结构优化工作提出了新的思路。

This paper established the cost objective function for the unit volume of concrete and unit volume of reinforced steel.Then,combined with the computation formula and assumptions of the double-reinforced cross-section beam,the calculation formula of the double-reinforced cross-section beam was deduced and evolved.Finally,the index of the excellent economic reinforcing rate of the double-reinforced cross-section beam was obtained.On the base of that,the two layers of the pure basement(16 palace diagram was used)were modeled and simulated by PKPM software,and the different section sizes of the basement roof beams of the model were tested.The statistical analysis of the trial calculation results verifies the correctness of the excellent economic reinforcement ratio index of the double-reinforced cross-section beam.The proposal of this idea provides a reference for structure designers to design economical beam sections,provides a basis for real estate development enterprises to evaluate the design results of design companies,and opens up a new direction for structural optimization work.