A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental study on behaviors of reinforced concrete slabs after fire
Using a homemade large-scale high temperature experimental stove, a group of reinforced concrete slabs are heated on their single surfaces, of which the loading operating modes are different. After cooling naturally, the tests of loading failure are done. During the tests, the law of the deflections of middle span and one-third span changing with load were observed and recorded, and the rule of strain increasing are noted through the dial gauges placed on the surfaces of both the top and bottom, the distributing and expansion of the cracks are measured and recorded also at the same time. Through these tests and record, the characteristics of loading failure and deformation rules of reinforced concrete slabs after high temperature are investigated, and the behaviors after high temperature are analyzed and compared for slabs under different temperature stress paths, such as heated but not loaded, loaded and heated, strengthened and heated and so on. High temperature and initial stress affect more on the behaviors of the slabs after fire, and strengthening them with high capability and fire-resistance materials can effectively improve the fire-resistance capabilities of structures. The reference and basis are offered to study and analyze fire resistance and restoration strengthened after fire of reinforced concrete structure. The following conclusions can be drawn: (1) Fire can cause the behaviors of the steel and concrete reduce and the carrying capability of the concrete members after fire drop. And the degree of this dropping lies in the temperature of fire ultimately. Generally speaking, the higher the temperature of fire, the larger the loss of the carrying load and the less the carrying capability of the reinforced concrete members. (2) The instance of load under fire affects more on the residual carrying capability of structure after fire. The existence of initial stress can cause the cracks in structure extend and develop continually, the damage accumulation of the concrete and the loss of the carrying capability of structures increase. (3) It can effectively improve the fire-resistance capabilities of structures to strengthen them with high capability and fire-resistance materials.
Experimental study on behaviors of reinforced concrete slabs after fire
Using a homemade large-scale high temperature experimental stove, a group of reinforced concrete slabs are heated on their single surfaces, of which the loading operating modes are different. After cooling naturally, the tests of loading failure are done. During the tests, the law of the deflections of middle span and one-third span changing with load were observed and recorded, and the rule of strain increasing are noted through the dial gauges placed on the surfaces of both the top and bottom, the distributing and expansion of the cracks are measured and recorded also at the same time. Through these tests and record, the characteristics of loading failure and deformation rules of reinforced concrete slabs after high temperature are investigated, and the behaviors after high temperature are analyzed and compared for slabs under different temperature stress paths, such as heated but not loaded, loaded and heated, strengthened and heated and so on. High temperature and initial stress affect more on the behaviors of the slabs after fire, and strengthening them with high capability and fire-resistance materials can effectively improve the fire-resistance capabilities of structures. The reference and basis are offered to study and analyze fire resistance and restoration strengthened after fire of reinforced concrete structure. The following conclusions can be drawn: (1) Fire can cause the behaviors of the steel and concrete reduce and the carrying capability of the concrete members after fire drop. And the degree of this dropping lies in the temperature of fire ultimately. Generally speaking, the higher the temperature of fire, the larger the loss of the carrying load and the less the carrying capability of the reinforced concrete members. (2) The instance of load under fire affects more on the residual carrying capability of structure after fire. The existence of initial stress can cause the cracks in structure extend and develop continually, the damage accumulation of the concrete and the loss of the carrying capability of structures increase. (3) It can effectively improve the fire-resistance capabilities of structures to strengthen them with high capability and fire-resistance materials.
Experimental study on behaviors of reinforced concrete slabs after fire
Experimentelle Untersuchung des Verhaltens von Stahlbeton-Deckenplatten nach einem Brand
Wang, Zhongqiang (author) / Yu, Zhiwu (author) / Yu, Feng (author)
2004
5 Seiten, 8 Bilder, 1 Tabelle, 12 Quellen
Conference paper
English
Fire Response of Reinforced Concrete Slabs
| NTIS | 1977
Modelling of reinforced concrete slabs in fire
| British Library Online Contents | 2018
Experimental Study on Reinforced Concrete Superposed Slabs
| British Library Conference Proceedings | 2012