首页|Experiment Study on Compressive Membrane Action of Slab Strips Restrained by Shear Walls
Experiment Study on Compressive Membrane Action of Slab Strips Restrained by Shear Walls
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Subjecting to the compressive membrane action (CMA), the ultimate load capacity of the reinforced concrete (RC) slab with lateral restraint would be improved obviously. Test of 12 one-way slab specimens restrained by shear-walls was carried out to investigate the properties of the slab strips' compressive membrane action. The reduced-size specimens were designed to keep the ratios of shear-walls' restraint stiffness to slab strips' flexural stiffness unchanged. One horizontal testing instrument was first used to record the development of the slabs' lateral restraint forces. The ultimate loads of slab strips with certain lateral restraint stiffness gave an average 38.3% rise from the calculations of upper-bound method. Though the increment of slab's ultimate load was due to the additional moment formed by the lateral restraint force, the results showed that the peak of lateral force lagged of the slab strips' ultimate load, which was different from the previous hypothesis. Various parameters which affect the development of CMA were also investigated, such as the shear-wall's thickness, axial load on the walls, the slab strips' height-span ratio and reinforcement percentage.
experiment studyslab stripscompressive membrane actionlateral restraint force
Wang Qingxiang、Wang Gang、Li Zhongjun
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State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology,Dalian 116024, PR China
The Design Institute of Civil Engineering & Architecture of DUT, Dalian 116025, PR China
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