Research on the Design Method of a Scale Model of ECC Reinforced Concrete Precast Shear Wall Structure

Abstract

Engineered cementitious composite (ECC) is a class of high performance cementitious composites with pseudo strain hardening behavior and excellent crack control. Substitution of concrete with ECC can avoid the cracking and durability problems associated with brittleness of concrete. In this paper, it is aimed to design a scale model of ECC reinforced concrete precast shear wall structure. Referencing the prototype structure which is a precast concrete shear wall structure in Nantong, Jiangsu Province, China, the size similarity constant is taken as 1/2. Consulting the scale similarity conditions, the similarity similar constants representing material characteristics, geometrical features, and load characteristics are calculated using the strength similarity theory. Besides, the reinforcements in the model structure are calculated and analyzed. The diameters of reinforcing steel bars in the model structure are determined by the principle of similar size. Equivalent principle of yield bearing capacity are used when there is no corresponding reinforcement selection. The research results of this paper will provide valuable preferences for design and analysis of ECC reinforced concrete precast shear wall structure.

Calculation of Characteristic Point Parameters for Restoring Model of Corroded Short-Pier RC Shear Walls

“…When sliding micro-cracks appeared in the concrete aggregate section in the plastichinge area of the wall, the state corresponding to the stable crack development stage of the concrete was defined as the cracking state, as outlined in [17]. Because the RC shear wall was basically in an elastic stage before cracking, its corresponding cracking load P cr and cracking displacement ∆ cr could be calculated, approximately, according to the cantilever beam or by fitting regression with a large number of test data.…”

Experimental Investigation on Bending Behavior of Existing RC Beam Retrofitted with SMA-ECC Composites Materials

“…Engineered Cementitious Composites (ECC) is a kind of high-performance cementitious composite with obvious strain hardening characteristics and good crack control ability [ 29 , 30 ]. Ding et al [ 31 ], Wu et al [ 32 ], Yang et al [ 33 ], and Said et al [ 34 ] have carried out the research on beams, columns, walls, joints, and other components casted with ECC, respectively. These studies indicates that, compared with ordinary concrete, ECC has excellent tensile performance, fine cracking mechanism, and good ductility.…”