This article analyzes the progress in building the CAS contingent of young R&D professionals, and clarifies policies concerning talent training at the CAS.
Building defect is an issue in existing buildings that needs urgent tackling to prevent further problems. This study assessed the defects in concrete elements in residential buildings of 30 years and above in the Onit...Building defect is an issue in existing buildings that needs urgent tackling to prevent further problems. This study assessed the defects in concrete elements in residential buildings of 30 years and above in the Onitsha metropolis of Anambra State, Nigeria. Data collection instruments in the study include structured questionnaire, interviews, visual inspection/observations, archival records, recordings, photographs;and non-destructive testing of the concrete elements in an existing building in the study area. The population of this study constituted of the construction registered professionals and the existing buildings in study area. The sample for the study was based on the calculated sample size using Taro Yamani Formula. A total of 158 registered professionals were sampled from the population of 260. The questionnaires were purposively distributed to the registered professionals up to the required sample sizes of 158 and 129 questionnaires were properly filled and returned. The study used the SPSS and Microsoft Excel to analyze the data. The results were analyzed in percentages and figures using descriptive statistics and presented in the form of pie charts and tables. The finding of the study revealed that the causes and effects of structural defects on the concrete elements in existing buildings in the study area according to the rating are;exposed/corrosion of the embedded metals, faulty workmanship, overload and impacts, chemical attack, freeze-thaw deterioration, fire/heat, restraint to volume change. The visual observation revealed that the structural elements are characterized by heavy defects such as deep vertical, horizontal and diagonal cracks, exposed/ corrosion of the embedded metals, spalling of the concrete slabs. The existence of defects in the concrete members led to the low compressive strength of the concrete elements and the structural instability of the existing buildings as revealed by the non-destructive test. The non-destructive test result revealed that most of the tested concrete elements have low compressive strength value and such were remarked poor as they did not satisfy the assumed value. Essentially, the study concluded by recommending that regular monitoring, inspections and non-destructive testing of concrete elements should be conducted on existing aged and defected buildings to detect the structural stability of the buildings;and it is imperative to evacuate occupants from heavy structurally deteriorated and defected buildings since most of them have lost their residual design life span and ability to sustain imposed loads.展开更多
In this article, we set out from the library practical application, combined with the design of the built environment of space, lighting, color and other basic elements, build a library building to explore the interna...In this article, we set out from the library practical application, combined with the design of the built environment of space, lighting, color and other basic elements, build a library building to explore the internal environment. Application by Building Environment and Energy Engineering Practice teaching profession as well as social needs of research, combined with the professional status of teaching practice, Jiangsu University, discusses the necessity to build a new practice teaching system. In the student-oriented, systematic principles and openness from the three aspects of the practice of teaching objectives, practical teaching, practice teaching management and examination and evaluation systems of practical teaching system reform, to make the practice of teaching students to become ability , the real meaning of the ability to solve practical problems and innovative spirit are re？ ected, for training for the development needs of the times by the employers and quali＇ ed personnel create the conditions. Entering the new century, sustainable development has become a more serious topic in the world, in order to more effectively control and use of our environmental resources, many countries have formulated relevant building environmental assessment system.展开更多
文摘This article analyzes the progress in building the CAS contingent of young R&D professionals, and clarifies policies concerning talent training at the CAS.
文摘Building defect is an issue in existing buildings that needs urgent tackling to prevent further problems. This study assessed the defects in concrete elements in residential buildings of 30 years and above in the Onitsha metropolis of Anambra State, Nigeria. Data collection instruments in the study include structured questionnaire, interviews, visual inspection/observations, archival records, recordings, photographs;and non-destructive testing of the concrete elements in an existing building in the study area. The population of this study constituted of the construction registered professionals and the existing buildings in study area. The sample for the study was based on the calculated sample size using Taro Yamani Formula. A total of 158 registered professionals were sampled from the population of 260. The questionnaires were purposively distributed to the registered professionals up to the required sample sizes of 158 and 129 questionnaires were properly filled and returned. The study used the SPSS and Microsoft Excel to analyze the data. The results were analyzed in percentages and figures using descriptive statistics and presented in the form of pie charts and tables. The finding of the study revealed that the causes and effects of structural defects on the concrete elements in existing buildings in the study area according to the rating are;exposed/corrosion of the embedded metals, faulty workmanship, overload and impacts, chemical attack, freeze-thaw deterioration, fire/heat, restraint to volume change. The visual observation revealed that the structural elements are characterized by heavy defects such as deep vertical, horizontal and diagonal cracks, exposed/ corrosion of the embedded metals, spalling of the concrete slabs. The existence of defects in the concrete members led to the low compressive strength of the concrete elements and the structural instability of the existing buildings as revealed by the non-destructive test. The non-destructive test result revealed that most of the tested concrete elements have low compressive strength value and such were remarked poor as they did not satisfy the assumed value. Essentially, the study concluded by recommending that regular monitoring, inspections and non-destructive testing of concrete elements should be conducted on existing aged and defected buildings to detect the structural stability of the buildings;and it is imperative to evacuate occupants from heavy structurally deteriorated and defected buildings since most of them have lost their residual design life span and ability to sustain imposed loads.
文摘In this article, we set out from the library practical application, combined with the design of the built environment of space, lighting, color and other basic elements, build a library building to explore the internal environment. Application by Building Environment and Energy Engineering Practice teaching profession as well as social needs of research, combined with the professional status of teaching practice, Jiangsu University, discusses the necessity to build a new practice teaching system. In the student-oriented, systematic principles and openness from the three aspects of the practice of teaching objectives, practical teaching, practice teaching management and examination and evaluation systems of practical teaching system reform, to make the practice of teaching students to become ability , the real meaning of the ability to solve practical problems and innovative spirit are re？ ected, for training for the development needs of the times by the employers and quali＇ ed personnel create the conditions. Entering the new century, sustainable development has become a more serious topic in the world, in order to more effectively control and use of our environmental resources, many countries have formulated relevant building environmental assessment system.
