Punching of reinforced concrete slab without shear reinforcement: Standard models and new proposal  

作　　者：Luisa PANI Flavio STOCHINO 

机构地区：[1]Department of Civil,Environmental Engineering and Architecture,University of Cagliari,Cagliari 09123,Italy

出　　处：《Frontiers of Structural and Civil Engineering》2020年第5期1196-1214,共19页结构与土木工程前沿（英文版）

基　　金：The financial support of the A utonomous Region of Sardinia under Grant PO-FSE 2014-2020,CCI:2014-IT05SFOP021,through the project"Retrofitting,Rehabilitation and Requalification of the Historical Cultural Architectural Heritage(R3-PAS)",is acknowledged by Flavio Stochino.

摘　　要：Reinforced concrete(RC)slabs are characterized by reduced construction time,versatility,and easier space partitioning.Their structural behavior is not straightforward and,specifically,punching shear strength is a current research topic.In this study an experimental database of 113 RC slabs without shear reinforcement under punching loads was compiled using data available in the literature.A sensitivity analysis of the parameters involved in the punching shear strength assessment was conducted,which highlighted the importance of the flexural reinforcement that are not typically considered for punching shear strength.After a discussion of the current international standards,a new proposed model for punching shear strength and rotation of RC slabs without shear reinforcement was discussed.It was based on a simplified load-rotation curve and new failure criteria that takes into account the flexural reinforcement effects.This experimental database was used to validate the approaches of the current international standards as well as the new proposed model.The latter proved to be a potentially useful design tool.

关 键 词：punching shear strength reinforced concrete SLABS reinforcement ratio 

分 类 号：TU37[建筑科学—结构工程]