Protective Technology Research Group

completed projects

TRANSIENT RESPONSE OF STEEL LATTICE TOWER TO BLAST LOADING
(Prof Pan T-C, A/Prof Soh C K, Mr Chia K H and Mr Wong J S)

• Numerical investigation on transient dynamic response of steel lattice tower to blast over-pressure
• Evaluation of member capacities and identification of yielding locations

RESPONSE OF PILED FOUNDATIONS TO TRANSIENT DYNAMIC LOADING
(Prof Pan T-C, A/P Leong E C, A/P Zhao Z Y, A/P Hao H, Prof Soh C K and Prof V Choa)

• Numerical investigation on free field response of dry, wet and layered soils
• Experimental and numerical investigations on pile response to explosions
  

SITE CHARACTERISATION OF THE BUKIT TIMAH GRANITE AND GROUND SHOCK MEASUREMENTS
(A/P Zhao J and Dr Zhou Y X)

• Characterisation of the Bukit Timah granite for the design of an ammunition storage facility
• Examining the geological setting, and assessing the rock mass and hydrogeologic quality
• Studying the propagation of ground shock and its effects
  

COMPUTER MODELLING OF GROUND SHOCK WAVE PROPAGATION AND ITS EFFECTS ON SURFACE STRUCTURES
(A/P Hao H, and A/P Zhao J)

• Attenuation of peak ground velocity and acceleration
• Attenuation of power spectrum and response spectrum
• Preliminary damage assessment
  

ELASTIC CONSTANTS OF ALUMINIUM TRUSS-CORE SANDWICH PANELS
(A/P Lok T S)

• Study the elastic constants of the truss-core sandwich panels
  

on-going projects

THEORETICAL AND EXPERIMENTAL STUDY OF DAMAGE CRITERIA FOR RC STRUCTURES SUBJECTED TO BLAST INDUCED GROUND EXCITATIONS
(A/P Hao H, A/P Zhao J and A/P Lok T S)

• Establish numerical procedures to estimate response and damage of RC structures subjected to underground explosions
• Conduct shake table test on scaled models for correlation studies
  

CHARACTERISATION OF THE BUKIT TIMAH GRANITE AND CAVERN ENGINEERING
(A/P Zhao J, A/P Hao H, and Prof Wong I H)

• Rock engineering investigation, ground shock monitoring at site and rock mass damage domain study
• Trial cavern - design, construction and monitoring
  

DYNAMIC RESPONSE OF ROCK TUNNELS
(A/P Hao H, A/P Zhao J, A/P Zhao Z Y and Dr Wang B)

• Investigate the effects of explosive load on rock masses around caverns including failure mechanism, support requirements and mitigation measures
  

DAMAGE ASSESSMENTOF LIGHTLY REINFORCED CONCRETE BEAM-COLUMN JOINTS UNDER REVERSE CYCLIC LOADING
(Prof Pan T-C, Ast/P P Irawan, A/P Teng S, and Prof Soh C K)

• Static, dynamic and high-speed dynamic cyclic load testing of full-scale lightly reinforced concrete beam-column joints
• Damage assessment of selected buildings with typical beam-column details subjected to ground shocks
  

STEEL FIBRE REINFORCED CONCRETE MATERIAL AND FIBREMAT HARDENING SYSTEM FOR STRUCTURES TO RESIST BLAST EFFECTS
(A/P Lok T S, A/P Hao H, and A/P Zhao J)

• Investigate the use of steel fibre shotcrete as rock cavern lining
• Study the effects of fibre shotcrete lining on the minimum distance between adjacent storage caverns
  

CHARACTERISATION OF GROUND MOTION IN TROPICAL SOILS DUE TO TRANSIENT DYNAMIC LOADING
(A/P Leong E C, Prof Cheong H K and A/P H Rahardjo)

• Develop an in-situ measurement unit into a triaxial system to determine dynamic soil properties
• Study free field wave propagation in soils subjected to explosions
• Establish the database of dynamic properties of Singapore soils
• Study soil-structure interaction due to blast loading

CONSTITUTIVE MODEL FOR REINFORCED CONCRETE MATERIALS AGAINST PENETRATION
(A/P Fan S C, Ast/P Li Q M, A/P Lok T S and A/P Shu D W)

• Conduct quasi-static and dynamic material tests for concrete and re-bar materials
• Encode the semi-theoretical constitutive model
• Conduct a series of systematic penetration tests

ASSESSMENT AND EVALUATION OF CURRENT STRUCTURAL SYSTEM AND DETAILING FOR SHOCK AND BLAST LOADING
(Prof Pan T-C and A/P Li Bing)

• Investigate the overall dynamic response of typical reinforced concrete building structures subjected to shock and blast loading
• Assess the demand and capacity of these building structural systems
• Improve the current design details and examine how they influence the overall structural performance under shock and blast loading
• Develop guidelines for design and construction of in-situ and precast concrete structures to resist shock and blast loading

PARAMETRIC CALCULATIONS OF UNDERGROUND EXPLOSION INDUCED STRESS WAVE PROPAGATION AND ITS EFFECTS ON DYNAMIC RESPONSE AND DAMAGE OF SURFACE STRUCTURES
(Ast/P Lu Y and A/P Hao H)

• Classifying ground shocks and surface building structures for the purpose of damage assessment
• Numerical parametric studies of ground shock effects on various types of surface structures
• Correlating building damage and ground shock intensity to develop the corresponding guidelines

MODELLING OF BREAKUP OF CONCRETE MAGAZINE STRUCTURES SUBJECTED TO INTERNAL EXPLOSION AND NUMERICAL SIMULATION OF DEBRIS THROW
(Ast/P Lu Y and A/P Hao H)

• Modelling of the dynamic behaviour of concrete and reinforced concrete at high strain rates
• Studying the breakup mechanism of concrete box structures subjected to internal blast loading
• Numerical simulation of concrete breakup and debris throw processes

DESIGN OF LIGHTWEIGHT TRUSS-CORE SANDWICH BLAST DOOR
(A/P Lok T S)

• Air-blast test to assess the performance of full-scale blast door
• Numerical simulation of dynamic door response to air-blast
• Simplified design procedures to resist air-blast

ANALYSIS OF IN-STRUCTURE SHOCK OF EXPLOSIVELY LOADED STRUCTURES AND EQUIPMENT
(A/P Shu D W, Ast/P Lu Y and A/P Hao H)

Part A: Laboratory Simulation and Numerical Analysis of In-Structure Shock of Equipment

• Develop a methodology to simulate equipment under shock loading and certify their suitability for deployment with laboratory testing and numerical simulation
• Evaluate existing shock absorbers and recommend the types of shock absorbers to protect delicate equipment

Part B: Analysis of Dynamic Response and Characterisation of In-Structure Shock of Explosive Loaded Structures

• Establish reliable material and numerical models to estimate dynamic structural response to explosive loads
• Design and construct scaled models for field tests and analysis of test data
• Develop design guidelines for characterisation of in-structure shock environment