钢-混凝土组合扁梁受弯性能理论分析与试验  

Theoretical Analysis and Experimental Study on Bending Behavior of Steel-Concrete Composite Flat Beams

作　　者：龚超[1] 康浩 侯兆新[1] 王玉银[3] 梁伟桥 张国伟 Chao Gong;Hao Kang;Zhaoxin Hou;Yuyin Wang;Weiqiao Liang;Guowei Zhang(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;China Highway Engineering Consultants Corporation,Beijing 100089,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]中国公路工程咨询集团有限公司,北京100089 [3]哈尔滨工业大学土木工程学院,哈尔滨150090 [4]北京建筑大学土木与交通工程学院,北京100044

出　　处：《钢结构（中英文）》2020年第6期41-49,共9页Steel Construction（Chinese & English）

基　　金：国家重点研发计划项目(2016YFC0701201)。

摘　　要：钢-混凝土组合扁梁楼盖以其楼盖结构高度小、防火性能好、下表面平整观感好、便于管线铺设以及在经济跨度范围内梁高更小的优势,在国外(特别是英国和北欧地区)得到了较广泛的应用。实际工程中,钢-混凝土组合扁梁楼盖应用较多的是SP预应力混凝土叠合楼板和深肋压型钢板组合楼板,用于住宅建筑时,存在以下不足:1)钢梁下翼缘外露,需要进行防腐防火保护;2)深肋压型钢板组合扁梁下翼缘不平整需做吊顶,增加了成本和结构高度;3)SP预应力混凝土叠合楼板和深肋压型钢板组合楼板均为单向板,导致楼盖厚度较大,且楼盖高度难以进一步降低等,制约了钢-混凝土组合扁梁楼盖在实际工程中的应用。为此,提出了预制叠合密肋楼板和预制叠合密肋楼板组合扁梁楼盖的概念,预制叠合密肋楼板由预制带肋底板和现浇层组成,可实现双向传力。由于该新型预制叠合密肋楼板组合扁梁楼盖区别于传统的SP预应力混凝土叠合楼板和深肋压型钢板组合扁梁楼盖,为研究该新型组合扁梁楼盖预制叠合密肋楼板与钢梁协同工作性能及其设计方法,结合某高层钢结构住宅示范工程的设计,对该新型钢-混凝土组合扁梁的受弯性能进行了理论分析与试验研究。设计制作了2个预制叠合密肋楼板组合扁梁试验试件,主要变化参数为钢梁腹板开孔形式和剪力键设置方式。钢梁采用焊接不等翼缘钢梁,楼板采用预制叠合密肋楼板,预制板均不出筋。钢材牌号为Q345B,楼板混凝土强度等级为C35,钢筋为HRB400级。试件计算长度为3 800 mm,几何长度为4 000 mm。通过试验研究该新型钢-混凝土组合扁梁的承载能力、延性、变形性能、裂缝开展、应力及应变发展情况等。在试验研究的基础上,提出了预制叠合密肋楼板组合扁梁抗弯极限承载力计算简化假定,并基于破坏强度理论推导了预制叠合密肋楼�The steel-concrete composite slim floor has the advantages of small height of the floor structure,good fire resistance,good appearance of the lower surface,easy pipeline laying,and smaller beam height in the economic span,and has been widely used in foreign countries(especially the United Kingdom and Northern Europe).The steel-concrete composite slim floor commonly used in the actual project is SP prestressed hollow slab and deep deck steel plate composite floor.When used in residential buildings,there are the following deficiencies:1)The lower flange of the steel beam is exposed,requiring anti-corrosion and fire protection.2)The uneven bottom flange of composite slim beam with deep deck needs to be suspended,which increases cost and structural height.3)SP prestressed hollow slab and deep rib profiled steel plate both are one-way slabs,which results in a large floor thickness,and it is difficult to further reduce the height of the floor,which restricts the application of the steel-concrete composite slim floor in practical projects.To this end,this paper presents the concept of prefabricated concrete hollow slab and composite slim beam with concrete hollow slab.The prefabricated concrete hollow floor is composed of prefabricated concrete hollow slab and cast-in-place concrete,which can achieve two-way force transmission.Because this new type of composite slim beam with concrete hollow slab is different from the traditional SP prestressed hollow slab and deep rib profiled steel plate.In order to study the cooperative working performance and design method of the new composite slim beam with concrete hollow slab,theoretical analysis and experimental study of the bending performance of the new steel-concrete composite slim beam with concrete hollow slab were carried out.In this paper,two specimens of composite slim beam with concrete hollow slabs were designed and manufactured.The main changing parameters were the opening pattern of steel beam webs and the settings of shear keys.The steel beams are welded unequal fla

关 键 词：组合扁梁 PBL剪力连接件 受弯性能 理论分析 试验研究 

分 类 号：TU398.9[建筑科学—结构工程]