| Ongoing 
        researches | 
| Collapse 
        Prevention | 
| Address | 
| Department 
        of Civil Engineering | 
|  Tsinghua 
        University | 
|  Beijing, 
        PR China,100084 | 
| Email | 
| Last 
        revised on Feb. 12. 09 | 
|        | 
| Design Methods for Collapse Prevention 
 Technical Papers |