考虑楼板空间组合效应的组合框架体系纤维模型

将正常使用极限状态和承载能力极限状态有效宽度公式与传统纤维模型相结合，通过修正楼板钢筋和混凝土材料的单轴本构关系，实现了一种改进的考虑楼板空间组合效应的纤维模型，利用该模型可以在组合框架体系非线性分析中采用高效的全杆系单元合理地考虑复杂楼板空间组合效应的影响。基于考虑楼板空间组合效应的纤维模型，开发了一套较为完整的组合结构非线性有限元分析程序COMPONA-MARC (Version 1.0)。最后，将开发程序应用于多个组合框架抗震试验的模拟，结果表明了本文模型可较为准确地模拟组合框架弹塑性全过程的楼板空间组合效应。

Fiber model of composite frame systems considering slab spatial composite effect

The formulas for calculating the effective flange widths at the serviceability and ultimate limit states are combined with the conventional fiber model so that an improved fiber model, which can reasonably consider the slab spatial composite effect, is realized through the modification of the uniaxial constitutive laws of slab reinforcement and concrete. When this model is adopted, only the efficient ‘line’ elements are required to reasonably consider the influence of the complex slab spatial composite effect in nonlinear analysis of composite frames. Furthermore, based on the proposed model, a complete program for non-linear analysis of composite structures COMPONA-MARC (Version 1.0) was developed. Finally, the simulations of several seismic loading tests of composite frames using the developed program show that the proposed model can accurately trace the elastic-plastic whole-process slab spatial composite effect of composite frames.