Jeeyoung Lim

A Study of Client's Role for Safety Management at Construction Sites

Larger and more sophisticated building construction requires more input resources such as worker, materials and devices. Growing resource volume brings risks at a construction site. The industry makes an effort to protect probable incidents at the site by organizing a safety management team. conducting a safety instruction and etc, but losses especially in the construction are higher than other industries. Major reason is that the safety management program is conducted only at the step of construction work and a root cause is not eliminated. Conventionally a concerned party shifts the blame to other parties such as constructor and site workers who are direct participants in the construction site. However, the whole causes of incidents go to the all subject of the construction not only the constructor but the client, designer and others related in the construction, and especially the clients are heavily involved in general concerns of the project. Therefore, this study is defined the role of the clients in nations and domestic condition of construction safety management is investigated. And it is analyzed surveys to prevent incidents at construction sites, and suggested the role of the clients which is classified pre and post construction, and in the middle of construction, and also categorized planning and design & construction schedule especially for the pre-construction level.

A Health Performance and Cost Optimization Model for Sustainable Healthy Buildings

To construct a sustainable and healthy building, it is necessary to build a system capable of efficiently analyzing, assessing and managing health performance data over the life cycle of a building. To fulfill such needs, health-friendly resources database, life cycle health-performance tree, health performance evaluation and health management concepts were suggested. Such studies focused on health performance. Selecting building materials based only on their health performance while ignoring cost is likely to lead to not only rapid construction cost increases, but also higher maintenance costs. For cost-benefit management, the health performance and cost management model was proposed. However, while the model can be used in decision-making, it is unable to suggest an optimization solution. To supplement this need, this study proposes a health performance and cost optimization model for sustainable healthy buildings. The model proposed here is composed of simulation and optimization modules for health performance and cost using the concepts mentioned above.

Risk Analysis of the In Situ Production of Precast Concrete Members

The precast concrete (PC) method has been preferred for reasons of shortening of construction time, quality assurance, and cost reduction. In addition, in situ production of PC members under equivalent production conditions can save costs while ensuring quality equal to or better than in-plant production. Despite these advantages, in situ production is being avoided due to possible risks from project management. Therefore, in order to generalize the in situ production of PC members, it is necessary to clarify the causes of the possible risks and establish responses. Therefore, the purpose of this study is to analyse the in situ production risks of PC members. The results of this study can be used to establish a systematic response plan for possible risks in the in situ production of PC members.

Risk Identification of Innovative Composite Precast Concrete Structure Applied to Heavy-Loaded- and Long-Span Buildings

Most of the heavy-loaded- and long-span buildings are being constructed with pin-joint PC method. For pin joints, adequate erection time is needed to ensure the structural stability of the joint. Since the SMART frame developed to solve this problem is moment-jointed, structural stability is ensured at the same time as the PC member is assembled. In addition, if SMART frame is used for heavy-loaded- and long-span building projects, it will be possible to shorten erection time, secure quality, and reduce costs. However, in order to apply the SMART frame in practice, it is necessary to predict in advance the risks that may arise during project execution. Therefore, the purpose of this study is to identify the risk identification of an innovative composite precast concrete structure with heavy-loaded- and long-span buildings. The results of this study will be used as basic data for systematic risk management when SMART frame method is applied.