Ding et al. (2018) — Structural behaviors of ultra-high performance...

Citation

Yao Ding, Ke-Quan Yu, Jiang-tao Yu, Shi-lang Xu (2018). Structural behaviors of ultra-high performance engineered cementitious composites (UHP-ECC) beams subjected to bending-experimental study. Construction and Building Materials, Vol. 177, pp. 102-115.

DOI: 10.1016/j.conbuildmat.2018.05.122
Atlas layer: extension
Related Victor Li book chapter: Chapter 6: Structural Applications; Chapter 5: High-Strength ECC
Source PDF: ding-2018-structural-behaviors-of-ultra-high-performance.pdf
Extracted text: atlas/full_text/ding-2018-structural-behaviors-of-ultra-high-performance_full_text.md
Source note: atlas/source_notes/ding-2018-structural-behaviors-of-ultra-high-performance_source_note.md

Why this paper matters

Provides structural-scale experimental verification that unreinforced UHP-ECC beams ($f_c = 119.6\text{ MPa}$, $\sigma_{tu} = 16.46\text{ MPa}$, $\varepsilon_{tu} = 8.00\%$) can achieve bending load-bearing capacities approaching ordinary reinforced concrete beams with 1.86% steel reinforcement, proving the feasibility of substantial rebar reduction.

Main contribution

Evaluated flexural and shear performance of 14 reinforced and unreinforced UHP-ECC beams compared to RC beams across longitudinal reinforcement ratios of 0%, 0.69%, 1.86%, and 2.94%.
Demonstrated that unreinforced UHP-ECC beams reach flexural capacities matching RC beams with 1.86% steel rebar.
Proved that UHP-ECC's high elastic modulus (44.3 GPa) and micro-cracking capability substantially reduce serviceability deflections and crack widths while preventing brittle shear failures.

Evidence summary

Material tensile properties: $\sigma_{tu} = 16.46 \pm 0.90\text{ MPa}$, $\sigma_{tc} = 9.19 \pm 1.62\text{ MPa}$, $\varepsilon_{tu} = 8.00 \pm 1.00\%$, Strain energy = $1036 \pm 166\text{ kJ/m}^3$ (Table 5, page 106).
Material compressive properties: $f_c = 119.6 \pm 5.6\text{ MPa}$, $E = 44.3 \pm 3.4\text{ GPa}$, Peak strain = $2954\ \mu\varepsilon$ (Table 6, page 107).
Structural performance: Non-reinforced UHP-ECC beam load capacity approached RC beam with 1.86% rebar (RC3U8); crack widths remained $<150\ \mu\text{m}$.

Linked Atlas nodes

02_concepts/extreme_ductility_ecc.md
02_concepts/strain_hardening_criteria.md
05_experiments/direct_tensile_test.md

Claim-evidence rows to add

Atlas node	Claim	Evidence summary	Page/Figure/Table	Status
`02_concepts/extreme_ductility_ecc.md`	UHP-ECC achieves compressive strength of 119.6 MPa, tensile strength of 16.46 MPa, 8.00% tensile ductility, and 44.3 GPa elastic modulus.	Material tests confirmed $f_c = 119.6\text{ MPa}$, $\sigma_{tu} = 16.46\text{ MPa}$, and $\varepsilon_{tu} = 8.00\%$.	Pages 106-107, Tables 5, 6	verified_from_pdf
`02_concepts/extreme_ductility_ecc.md`	Non-reinforced UHP-ECC beams achieve bending capacity approaching ordinary RC beams with 1.86% steel reinforcement.	Unreinforced UHP-ECC beam (NU) showed flexural capacity comparable to RC3U8 (1.86% steel).	Page 102, Abstract; Section 3	verified_from_pdf

Verification status

PDF preserved: yes (ding-2018-structural-behaviors-of-ultra-high-performance.pdf)
Text extracted: yes (atlas/full_text/ding-2018-structural-behaviors-of-ultra-high-performance_full_text.md)
DOI verified: yes (10.1016/j.conbuildmat.2018.05.122)
Page/figure/table verified: yes
Claim-evidence matrix ready: yes

Cautions

Tested at beam dimensions of $100 \times 100 \times 550\text{ mm}$; large-scale structural members require size-effect considerations.