1. Overview

Unlike reinforced concrete shear-wall structure, the steel frame composite structure apartment makes full use of material advantages of both steel frame and concrete.  This new concept apartment maximizes simplicity in remodeling as well as durability, safety, constructability, and design efficiency.

2. Key Characteristics

Classification Characteristics  Design Versatile floor plan  More spacious interior  (maximization of usable space due to thinner walls)  A variety of elevated plans and sophisticated exterior  Efficient utilization of underground space (underground parking lot / convenient facilities  for residents)  Remodeling allowed  for each unit   Construction Easy management of building quality/ shortened construction period  Less construction waste material and more environmental friendly construction method through recycling  Resident  Early move-in date and lower financing cost from shortened construction period  High future value of apartment from easy remodeling Excellent earthquake resistance and durability as well as longer lasting building.   Residents can freely change the interior plan to suit their taste. (All walls can be disassembled, changed, and moved.) Parking and communal space has increased, making it more convenient for residents. (Creation of pleasant living environment) Spacious parking lot and pleasant complex environment

3. Development History

Year Development Descriptions 1992 Research concerning construction design of steel-framed high-rise apartments (Architectural Institute of Korea)  1994 First ever construction of steel-framed building, the Olympic Garden Tower in Seongnae-dong (Samsung Heavy Industries)   -19 households, 13 floors, commercial and residential building 1996 Research concerning the structural system of steel-framed high-riswe apartments    -Consociation of 8 companies, including Korea Housing Corporation, POSCO, Hyundai Engineering & Construction and Lotte Apartment  Construction of steel frame for POSCO employees' apartment (POSCO)   -200 units, 25 floors, the first residential steel-framed building  1997 Commercial and residential building   -Nasan Suite Tower (Shindaebang-dong), Halla Sigma Tower (Shinchun-dong)  1998 Residential apartment (3,000 households)    -Solecity (Donga Construction), Acroville (Daelim Industries), Yongin Suji (Hyundai Development Co.)  1999 High-rise apartments (7,000 units)    -Tower Palace (Samsung Engineering & Construction), Cherville (Samsung Heavy Industries), Hyperion (Hyundai Engineering & Construction), etc.  2000 Increase of urban rehabilitation apartments and expansion into local areas (10,000 households)    -Mizu and Baekjo apartments in Youido (Lotte Apartment), Dynasty 21 in Busan (Korea Industrial Development Co.)

4. Overseas Trend of Multiplex Apartment Buildings

Japan US Number of Floors Approx. 30 floors 28-78 floors Structure Type SRC type S type, SRC type Main Project Body Housing & Urban Maintenance Corporation, large construction companies Real estate developers Wide Distribution Second half of the 1980s Second half of the 1960s

5. Development of Application Technology for Multiplex Apartments

Technology Technology Overview Residence Improvement Technology Evaluation and improvement of floor impact sound insulation Evaluation and improvement of floor vibration performance Evaluation and improvement of thermal insulation for exterior walls Evaluation and improvement of sound insulation for walls between households CFT Applied Technology Design and fabrication techniques of CFT columns Application techniques of high performance steel and high strength concrete Design and fabrication techniques of CFT connections Assessment of concrete filled state Design recommendations for CFT structures Deck Plate Development Development of flat type deck plates for composite structure & structural design manual Development of deck plates for height reduction purposes Evaluation of economy and workability of deck plates Development and Technology Application of Earthquake Resistant Damper Development of elastic-plastic hyteretic damper Development of structural system using dampers Seismic retrofit techniques for remodeling

Development of Multiplex Apartments With 100 Year Durability and Easy Remodeling Capacity

Development Background

The need for development of apartment structural system: Changes in residential style/ environmental pollution from development, and waste of national resources called for new developments in apartment structural system. Construction industry is responsible for 34% of the world's total energy consumption, 40% of resource consumption, and 50% of waste generation.

Apartments with conventional wall structure - Average lifespan of 23 years -> Need to develop longer-lasting apartment buildings, 58% of apartments in Seoul need to be redeveloped within the next10 years - Waste of national resources / spread of slum areas

Research Features

Links to Related Organizations

Korea National Housing Corporation, NT Apt.100 (www.ntapt.net) Steel Structure Research Laboratory at the Research Institute of Industrial Science & Technology (www.rist.re.kr) Posmidas (www.posmidas.com)