城市交通枢纽楼面活荷载等效方法研究  

Study on equivalent method of live load of urban transportation hub floor slab

作　　者：王士裴[1] 李雨航 张琳 李爱群 邓扬[2,3] Wang Shipei;Li Yuhang;Zhang Lin;Li Aiqun;Deng Yang(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing 100044,China;School of Civil&Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;College of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]北京未来城市设计高精尖创新中心,北京100044 [3]北京建筑大学土木与交通工程学院,北京100044 [4]东南大学土木工程学院,南京211189

出　　处：《建筑结构》2019年第24期60-66,共7页Building Structure

基　　金：国家自然科学基金项目(51878027)

摘　　要：提出了考虑单向板长宽比与公交车布置数量的等效均布荷载取值方法,并以某城市交通枢纽楼板为对象开展了楼面等效均布荷载取值研究。首先,在楼板上施加不同布置组合形式的公交车荷载,以确定公交车车轮最不利荷载位置。在此基础上,对规范取值计算出的等效均布荷载与实际车轮荷载进行对比,并引入单向板长宽比与车辆数量参数,在规范计算公式的基础上提出了改进的计算公式。结果表明:规范计算出的绝对最大弯矩不能很好地反映单向楼板受小面积局部荷载的受力特点;考虑长宽比与公交车数量的改进计算公式计算出的等效均布荷载所产生的结构响应与实际车轮荷载产生的结构响应较为相近,且偏于安全;楼板活荷载等效方法与楼板所在结构区域关系较小,均可采用改进计算公式进行计算。An equivalent uniform load method for considering the length-to-width ratio of one-way slab and public transit vehicle quantity was presented.The value of the equivalent uniform load of the slab was studied with a urban transportation hub floor as an object.Firstly,the public transit vehicle loads of different arrangement combinations were applied to the floor to determine the most unfavorable load position of the vehicle wheels.On this basis,the equivalent uniform load was calculated according to the code to compare with the actual wheel load,and the length-to-width ratio of the one-way slab and the vehicle quantity were introduced as coefficients.Finally,the improved formula are proposed based on the formula of code.The results show that the absolute maximum bending moment calculated by the code method cannot reflect the force and transmission characteristics of the small-area local load on the one-way slab,the structural response produced by the equivalent uniform load calculated by the improved formula including the coefficient of slab length-to-width ratio and vehicle quantity is similar to that of the actual wheel load,and it is safer.The improved equivalent method of the floor is less related to the area of the structure where the floor is located,and it is suitable for any area of the structure.

关 键 词：楼板长宽比 城市公交枢纽 大跨楼板 重载公交车 活荷载等效方法 

分 类 号：TU375.2[建筑科学—结构工程]