1. Zhengzhou University,School of Civil Engineering,Zhengzhou,China
2. Kyushu University,Department of Civil and Structural Engineering,Fukuoka,Japan
3. Universitas Gadjah Mada,Vocational College,Department of Civil Engineering,Yogyakarta,Indonesia
4. Universitas Muhammadiyah,Department of Civil Engineering,YogyakartaYogyakarta,Indonesia