Author: Brian G. Pfeifer
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 40
Book Description
Development of a Metal Cutting W-beam Guardrail Terminal
Author: Brian G. Pfeifer
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 40
Book Description
Development of a New End Treatment for W-beam Guardrail
Author: Asif Bashir Qureshy
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 366
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 366
Book Description
Transportation Research Record
Author:
Publisher:
ISBN:
Category : Air travel
Languages : en
Pages : 734
Book Description
Publisher:
ISBN:
Category : Air travel
Languages : en
Pages : 734
Book Description
Development of a Sequential Kinking Terminal for W-beam Guardrails
Author: Dean Sicking
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 12
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 12
Book Description
Development of New Guardrail End Treatments
Author: Dean Sicking
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 262
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 262
Book Description
Development of an Effective Flared Guardrail Terminal
Author: B. G. Pfeifer
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 129
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 129
Book Description
Development of a Generic Energy-absorbing Approach End Terminal for the Midwest Guardrail System
Author: Jordan T. Wipf
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Guardrail end terminals are often used to shield approach ends of roadside guardrail systems as well as protect errant motorists from the risk of rail penetration through the vehicle and/or rapid deceleration. Energy-absorbing end terminals absorb an errant vehicle’s kinetic energy through rail deformation, or other means, in order to safely decelerate the vehicle in a controlled manner. Most modern energy-absorbing terminals are proprietary, and few terminals have passed the safety evaluation criteria published in the American Association of State Highway and Transportation Officials (AASHTO’s) Manual for Assessing Safety Hardware (MASH) in order to be installed with the Midwest Guardrail System (MGS). State Departments of Transportation (DOTs) are faced with a need to install energy-absorbing, guardrail end terminals that meet current MASH impact safety criteria. Thus, the Midwest Pooled Fund Program member states deemed it desirable to develop a new generic energy-absorbing guardrail end terminal. Thus, this Phase I study was conducted to perform preliminary analysis and design of a preferred concept or prototype. This initial effort included an investigation of patents and Federal Highway Administration (FHWA) eligibility letters to identify energy-absorbing terminals and their energy-absorption methods. Next, brainstorming was conducted to identify methods that could be used in a new terminal, after which preliminary design calculations and drawings were completed. Thereafter, several project paths and preliminary concepts were presented to the sponsor, followed by additional calculations and brainstorming. The final terminal prototype and its geometry was investigated and designed using results obtained through computer simulation using 3-D nonlinear finite element analysis software, LS-DYNA. This analysis included simulated impacts with end terminal hardware translating down a W-beam guardrail segment. A complete prototype drawing set was produced and submitted to local fabricators to obtain a cost quote, which revealed that the prototype was too complicated to fabricate and more expensive than desired. Finally, additional brainstorming and design refinement was performed using LS-DYNA, which was directed to simplify fabrication, reduce end terminal cost, and decrease the resistance force during translation along the rail. Conclusions were drawn, and recommendations were presented for continuing this work in a second phase..
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Guardrail end terminals are often used to shield approach ends of roadside guardrail systems as well as protect errant motorists from the risk of rail penetration through the vehicle and/or rapid deceleration. Energy-absorbing end terminals absorb an errant vehicle’s kinetic energy through rail deformation, or other means, in order to safely decelerate the vehicle in a controlled manner. Most modern energy-absorbing terminals are proprietary, and few terminals have passed the safety evaluation criteria published in the American Association of State Highway and Transportation Officials (AASHTO’s) Manual for Assessing Safety Hardware (MASH) in order to be installed with the Midwest Guardrail System (MGS). State Departments of Transportation (DOTs) are faced with a need to install energy-absorbing, guardrail end terminals that meet current MASH impact safety criteria. Thus, the Midwest Pooled Fund Program member states deemed it desirable to develop a new generic energy-absorbing guardrail end terminal. Thus, this Phase I study was conducted to perform preliminary analysis and design of a preferred concept or prototype. This initial effort included an investigation of patents and Federal Highway Administration (FHWA) eligibility letters to identify energy-absorbing terminals and their energy-absorption methods. Next, brainstorming was conducted to identify methods that could be used in a new terminal, after which preliminary design calculations and drawings were completed. Thereafter, several project paths and preliminary concepts were presented to the sponsor, followed by additional calculations and brainstorming. The final terminal prototype and its geometry was investigated and designed using results obtained through computer simulation using 3-D nonlinear finite element analysis software, LS-DYNA. This analysis included simulated impacts with end terminal hardware translating down a W-beam guardrail segment. A complete prototype drawing set was produced and submitted to local fabricators to obtain a cost quote, which revealed that the prototype was too complicated to fabricate and more expensive than desired. Finally, additional brainstorming and design refinement was performed using LS-DYNA, which was directed to simplify fabrication, reduce end terminal cost, and decrease the resistance force during translation along the rail. Conclusions were drawn, and recommendations were presented for continuing this work in a second phase..
Cold Regions Engineering
Author: Kelly S. Merrill
Publisher:
ISBN:
Category : Architecture
Languages : en
Pages : 1100
Book Description
This collection contains 92 papers presented at the 11th International Conference on Cold Regions Engineering, held in Anchorage, Alaska, May 20-22, 2002.
Publisher:
ISBN:
Category : Architecture
Languages : en
Pages : 1100
Book Description
This collection contains 92 papers presented at the 11th International Conference on Cold Regions Engineering, held in Anchorage, Alaska, May 20-22, 2002.
Safety Modifications of Turned-down Guardrail Terminals
Author: John A. Hinch
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 48
Book Description
The purpose of the study was to develop safety modifications for turned-down guardrail terminals. The study incorporated the use of analysis, laboratory testing and full scale testing to develop a new terminal system. This terminal, Controlled Releasing Terminal (CRT), was tested against the performance requirements of TRC 191 and NCHRP 230 and found to pass.
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 48
Book Description
The purpose of the study was to develop safety modifications for turned-down guardrail terminals. The study incorporated the use of analysis, laboratory testing and full scale testing to develop a new terminal system. This terminal, Controlled Releasing Terminal (CRT), was tested against the performance requirements of TRC 191 and NCHRP 230 and found to pass.
Development of a W-beam Guardrail System for Use on a 2:1 Slope
Author: E. A. Keller
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 107
Book Description
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 107
Book Description