Seismic Tests on Heavyweight Concrete Shear Walls with Wire Ropes as Lateral Reinforcement.

摘要

The discusser would like to thank the authors for carrying out an interesting study highlighting the difference in flex-ural behavior of heavyweight concrete (HWC) shear walls with all configuration of wire-rope-tied boundary columns and that of conventional reinforcing bar ties through experimental tests and numerical validation. However, the discusser would like to express his concern about the choice of HWC used for shear wall tests with respect to: 1) low compressive strength; 2) mixture proportion and ingredients; and 3) volumetric index of wire ropes. The authors are grateful to the discusser for his interest in the paper. The discussion raises some important issues on which the authors make the following comments: 1. Heavyweight concrete (HWC) is generally used in radiation shielding structures and differs from normalweight concrete (NWC) by having special composition to improve its attenuation properties. When HWC is used for shielding, the density and material costs are of prime importance because the shielding capacity of a concrete element depends on member thickness and material density rather than material strength. Furthermore, high-strength HWC with high cement content and low water-cement ratio (w/c) may exhibit increased creep and shrinkage, and in a massive concrete placement could generate high temperatures at early ages causing undesirable thermal cracking. Code provisions~(1,20,21) related with HWC specify the minimum compressive strength of concrete to be 21 MPa (3000 psi) as a structural concrete for nuclear facilities.