1. Building Safety and Energy Efficiency, Hunan Univ., Changsha 410082, China; and Dept. of Civil and Environmental Engineering, Univ. of Southern California, Los Angeles, CA 90089 (corresponding author).
2. Advanced Bamboo and Timber Technologies, Ltd., Changsha 410082, China; formerly, MOE Key Laboratory of Building Safety and Energy Efficiency, Hunan Univ., Changsha 410082, China.