楼面主梁消防车等效均布荷载取值研究

Study on equivalent uniform live load on main floor beam for fire engines

关于楼面板消防车等效均布荷载的研究目前已经比较成熟,而针对楼面主梁消防车等效均布荷载的研究一直比较匮乏。我国现行《建筑结构荷载规范》(GB 50009—2012)规定的楼面主梁消防车等效均布荷载是以楼面板消防车荷载为基础乘以一个折减系数,这种做法误差较大。利用ANSYS有限元分析软件的APDL语言进行移动荷载作用下的编程,计算出消防车阵列在平面任意分布下楼面主梁的荷载效应,由此得到楼面主梁的消防车等效均布荷载。经过大量计算,综合考虑主梁跨度、柱网尺寸、次梁布置对其的影响,归纳出一定的规律。

The research on the equivalent uniform load of the floor for fire engines is relatively mature now,but the research on the equivalent uniform live load of the floor beam for fire engines is scarce. The load on floor beam for fire engines specified in the current Load code for the design of building structures（ GB 50009—2012） is multiplied by a reduction factor based on the floor load for fire engines,which has a large error. APDL language in ANSYS finite element analysis software was used for programming of moving load,to calculate the load effect of the main floor beam for fire engines array in arbitrary distribution,thus obtaining equivalent uniform live load of the main floor beam for fire engines. After a lot of calculations,some rules were summed up considering the effects of main beam span,column grid size and layout of secondary beam on the equivalent uniform live load.