机动法评定既有结构楼板承载力的简化方法  

A Simplified Method for Evaluating Floor Bearing Capacity of Existing Structures by Means of Mobility Method

作　　者：封云 王艳平 卢淑雯 刘洋 袁哲峰 FENG Yun;WANG Yanping;LU Shuwen;LIU Yang;YUAN Zhefeng(National Engineering Research Center of Building Technology,Beijing 100013,China;China Academy of Building Research,Beijing 100013,China)

机构地区：[1]国家建筑工程技术研究中心,北京100013 [2]中国建筑科学研究院有限公司,北京100013

出　　处：《工程质量》2020年第6期86-89,共4页Construction Quality

摘　　要：为解决既有建筑使用过程中局部区域使用功能改变后,楼板承载力需要进行评定的问题,论文提出了一种楼板承载力评定的简化方法。楼板几何条件、强度及钢筋配置可现场检测,截面的抵抗弯矩可以计算得出,利用塑性铰线理论的机动法评定楼板承载力,评定过程中不再使用楼板设计中求解内力的传统方法,而是在单位转角下,根据抵抗能与外力做功的比较进行评定。同时还提供了考虑薄膜效应提高承载力的量化计算方法。In order to solve the problem that the floor bearing capacity needs to be evaluated when local area changed in existing buildings,a simplified method for floor bearing capacity assessment is proposed.Floor geometric conditions,strength,and steel bar configuration can be determined on-site,then,the resistance moment of the section can be calculated based on these domains.The plastic method of plastic hinges could be used to evaluate the bearing capacity of the floor instead of the traditional method by solving internal forces in floor design.The unit corner based on the comparison of resistance energy and external force workmanship can be evaluated.At the same time,a quantitative calculation method is provided to improve the bearing capacity by considering the thin film effect.

关 键 词：机动法 楼板承载力评定 薄膜效应 

分 类 号：TU37[建筑科学—结构工程]