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Search Publications by: Long Phan (Fed)

Displaying 26 - 50 of 51

Performance of Physical Structures in Hurricane Katrina and Hurricane Rita: A Reconnaissance Report (NIST TN 1476)

June 30, 2006

Author(s)

Stephen A. Cauffman, Long T. Phan, Fahim Sadek, William P. Fritz, Dat Duthinh, Walter J. Rossiter Jr

This is the final report on the National Institute of Standards and Technology (NIST) led-reconnaissance to assess the performance of physical structures during Hurricane Katrina and Hurricane Rita. The report describes the environmental conditions (wind

Conclusions and Recommendations from the Pentagon Crash

August 1, 2005

Author(s)

Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen

The devastation in the September 11, 2001, terrorist attack on the Pentagon was reduced by the building s resilient structural system. The continuity, redundancy, and energy-absorbing capacity embodied in this system should be incorporated in structures

Description of Structural Damage Caused by the Terrorist Attack on the Pentagon

August 1, 2005

Author(s)

Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen

On September 11, 2001, an airliner was intentionally crashed into the Pentagon. It struck at the first elevated slab on the west wall, and slid approximately 310 ft (94.5 m) diagonally into the building. The force of the collision demolished numerous

On the Toughness of the Pentagon Structure

August 1, 2005

Author(s)

Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen

On 11 September 2001, the reinforced concrete structure of the Pentagon Building was able to resist, without collapse, the impact of a large commercial airliner despite the total loss of 26 columns and severe damage to 15 columns at the ground level. The

Pore Pressure in High-Strength Concrete at High Temperature

August 1, 2005

Author(s)

Long T. Phan

This paper presents results of an experimental program to study the effects of elevated temperature exposure on pore pressure buildup and potential for explosive spalling in normal strength (NSC) and high-strength concrete (HSC). Thermally-induced pore

Response to Fire Exposure of the Pentagon Structural Elements

August 1, 2005

Author(s)

Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen

An overview of fire damage sustained by the Pentagon structural elements in the September 11, 2001, terrorist attack is provided. The fire intensity in some compartments of the affected areas inside the Pentagon was approximated to be between those of the

September 11, 2001, Airliner Crash Into the Pentagon

August 1, 2005

Author(s)

Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen

The Pentagon was constructed between September 1941 and January 1943. A substantial renovation of the entire 6.6 million sq ft (610 thousand sq m) facility began in 1999 and is scheduled for completion in 2010. On September 11, 2001, a hijacked commercial

NIST-SFPE Workshop for Development of a National R&D Roadmap for Structural Fire Safety Design and Retrofit of Structures: Proceedings.

December 1, 2004

Author(s)

K H. Almand, Long Phan, Therese P. McAllister, M A. Starnes, John L. Gross

NIST-SFPE Workshop for Development of a National R&D Roadmap for Structural Fire Safety Design and Retrofit of Structures: Proceedings

April 20, 2004

Author(s)

K H. Almand, Long Phan, Therese P. McAllister, M A. Starnes, John L. Gross

This report describes the results of the workshop sponsored by the National Institute of Standards and Technology's Building and Fire Research Laboratory that was held on October 2-3, 2003 in Baltimore, MD. The workshop was planned to assist with the

NIST-SFPE Workshop for Development of a National R&D Roadmap for Structural Fire Safety Design and Retrofit of Structures: Proceedings.

December 1, 2003

Author(s)

K H. Almand, Long Phan, Therese P. McAllister, M A. Starnes, John L. Gross

Code Provisions for High Strength Concrete Strength-Temperature Relationships at Elevated Temperatures.

March 1, 2003

Author(s)

Long T. Phan, Nicholas J. Carino

This paper presents results of experiments, conducted at NIST and elsewhere, to measure compressive strength of concrete at elevated temperature. The paper compares the test data with existing design rules and recommendations to assess their applicability

The Pentagon Building Performance Report

January 1, 2003

Author(s)

P E. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen

Following the September 11 crash at the Pentagon of an airliner commandeered by terorists, the American Society of Civil Engineering established a building performance study team to examine the damaged structure and make recommendations for the future. The

High-Strength Concrete at High Temperature - An Overview

June 1, 2002

Author(s)

Long T. Phan

This paper presents results of NIST's experimental program on the effects of elevated temperature exposure on the mechanical properties and potential for explosive spalling of high strength concrete (HSC). Mechanical properties of HSC were measured by

Effects of the Test Conditions and Mixture Proportions on Behavior of High-Strength Concrete Exposed to High Temperatures

February 1, 2002

Author(s)

Long T. Phan, Nicholas J. Carino

Mechanical properties of high-strength concrete exposed to elevated temperatures were measured by heating 100 mm x 200 mm cylinders at 5 degrees C/min to temperatures of up to 600 C. Heating was carried out with and without a sustained stress, and

Effects of Elevated Temperature Exposure on Heating Characteristics, Spalling, and Residual Properties of High Performance Concrete

March 1, 2001

Author(s)

Long T. Phan, James R. Lawson, Frank L. Davis

Results of part of an ongoing research program, being conducted at the National Institute of Standards and Technology (NIST) to study effects of elevated temperature exposure on performance of high performance concrete (HPC), are presented. One of the

Mechanical Properties of High-Strength Concrete at Elevated Temperatures

March 1, 2001

Author(s)

Long T. Phan, Nicholas J. Carino

This report describes results of NIST's experimental program that focuses on effects of elevated temperature exposure on mechanical properties of hing strength concrete (HSC). Mechanical properties were measured by heating, with and without preload, the

Implications for Earthquake Risk Reduction in the United States From the Kocaeli, Turkey, Earthquake of August 17, 1999

August 1, 2000

Author(s)

John L. Gross, Long T. Phan

The moment magnitude (MW) 7.4 Kocaeli, Turkey, earthquake struck the Kocaeli province of northwestern Turkey on Tuesday, August 17, 1999 at 3:02 a.m. local time and caused extensive damage to buildings (an estimated 250,000 building units suffered from

Fire Performance of High Strength Concrete: Research Needs

May 1, 2000

Author(s)

Long T. Phan, Nicholas J. Carino

A compilation of fire test data which shows distinct behaviroal differences between HSC and NSC at elevated temperature is presented. The differences are most pronounced in the temperature range of 20 {degrees}C to 400 {degrees}C. What is more important is

Heating, Spalling Characteristics and Residual Properties of High Performance Concrete

March 1, 2000

Author(s)

Long T. Phan, James R. Lawson, Frank L. Davis

Experimental Plan for Testing the Mechanical Properties of High-Strength Concrete at Elevated Temperatures (NISTIR 6210)

May 1, 1999

Author(s)

Long T. Phan, Richard D. Peacock

This report outlines an experimental plan designed to quantify the effect of elevated temperature on the mechanical properties of high-strength concrete. The experimental program will examine the influences of the following factors: (1) different steady

The Fujita Tornado Intensity Scale: A Reassessment From Structural Engineering Perspective

May 1, 1999

Author(s)

Long T. Phan, Emil Simiu

This paper is a condensed version of two previous publications: NIST Technical Note 1426, by Long T. Phan and Emil Simiu; and ASCE Civil Engineering magazine article Tornado Aftermath: Questioning the Tools, by Long T. Phan and Emil Simiu.

Fujita Tornado Intensity Scale: A Critique Based on Observations of the Jarrell Tornado of May 27, 1997 (NIST TN 1426)

July 1, 1998

Author(s)

Long T. Phan, Emil Simiu

On May 27, 1997, several tornadoes hit the Central Texas area in the counties of McLennan, Bell, Williamson, and Travis. The most destructive of these tornadoes swept through a housing area on the outskirts of Jarrell, Texas. Jarrell is a Central Texas

Post-Installed Anchors. A Literature Review

January 1, 1998

Author(s)

Geraldine S. Cheok, Long T. Phan

A literature review of studies on the behavior of post-installed concrete anchors is presented. The survey covers several types of anchors that are subjected to tension loads, shear loads, and to combined shear and tension loads. Brief summaries of the

Review of Mechanical Properties of HSC at Elevated Temperature

January 1, 1998

Author(s)

Long T. Phan, Nicholas J. Carino

A compilation of experimental results on the mechanical properties of concrete when exposed to rapid heating as in a fire are presented. Emphasis is placed on concretes with high original compressive strengths. That is, high-strength concretes (HSCs). The

International Workshop on Fire Performance of High-Strength Concrete, NIST, Gaithersburg, MD, February 13-14, 1997, Proceedings

September 1, 1997

Author(s)

Long T. Phan

This report documents the presentations and discussions that were made at the NIST workshop on fire performance of high-strength concrete. The workshop was held at NIST in Gaithersburg, MD on Feb 13-14, 1997 in collaboration with the Portland Cement