摘要
用区间有限元方法求解活荷载不利分布问题,在INTLAB[1]基础上完成了求解活荷载不利分布的区间有限元MATLAB程序,算例初步验证了该方法的可行性与准确性。研究了平面框架在不同层数、跨数及活荷载大小的情况下,活荷载的不利分布对梁弯矩的影响程度。算例表明:活荷载大小和框架层数是决定是否考虑活荷载不利分布的重要因素,特别对于高层建筑结构,随着层数增加活荷载的不利分布对梁端弯矩的影响程度显著增大,工程设计中应给予考虑。
The interval finite element method is used to solve the unfavorable distribution of live load. Codes based on INTLAB have been developed to implement the interval finite element calculations. The accuracy of the algorithm is verified using a numerical example. The influence of unfavorable live load distribution to beam moment has been studied with different number of floors, number of bays and live loads. Numerical examples show that live loads and number of floors are important factors in deciding whether to consider the unfavorable live load distribution. Especially for tall building structures, the number of floors has a significant influence.
出处
《工程建设与设计》
2012年第5期72-75,共4页
Construction & Design for Engineering
关键词
区间方法
框架结构
活荷载不利分布
interval method
frame structure
unfavorable live load distribution
