Experimental Investigations on Punching Shear of Flat Slabs Made from Lightweight Aggregate Concrete

Archives of civil engineering

M. Gołdyn^1¹  Ł. Krawczyk^2²  T. Urban^4³  W. Ryżyński^3⁴ 

[1] Lodz University of Technology, 90-924, Łódź, Poland^1;Lodz University of Technology, 90-924, Łódź, Poland^2;Lodz University of Technology, 90-924, Łódź, Poland^4;State Higher Vocational School in Suwałki, 16-400, Suwałki^3

关键词: punching shear;    lightweight aggregate concrete;    fly ash;    shear stress;    double-headed studs;   

DOI  :  10.2478/ace-2018-0058

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

In the paper the results of experimental investigations concerning flat slabs made from reinforced lightweight concrete with sintered fly ash aggregate CERTYD were presented. In the research program 6 models made in a natural scale were included. The main variable parameter was slab longitudinal reinforcement ratio. The aim of investigation was the experimental verification of efficiency of double-headed studs as punching shear reinforcement. In the existing technical approvals such kind of reinforcement was allowed only in normal concrete slabs. It was demonstrated that double-headed studs can be an effective transverse reinforcement of lightweight aggregate concrete slabs. The use of double-headed studs resulted in increase in the ultimate load from 19% to 44%, depending on the slab reinforcement ratio which ranged from 0.5% to 1.2%. The comparative analysis showed that the Eurocode 2 provisions were conservative in relation to the experimental results, which were on average 42% higher than the theoretical ones however with a very low 7% coefficient of variation.

【 授权许可】

Unknown