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題名 | 鋼筋混凝土矩形斷面構架之可靠性分析 |
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作者姓名(中文) | 鄭明昌; 林俊龍; 徐德修; | 書刊名 | 技術學刊 |
卷期 | 2:2 1987.09[民76.09] |
頁次 | 頁239-246 |
分類號 | 441.557 |
關鍵詞 | 可靠性; 矩形; 構架; 鋼筋混凝土; 斷面; |
語文 | 中文(Chinese) |
中文摘要 | 在傳統之結構設計法中,大多將荷重與桿件抗力以「定值」來考慮,並滿足桿件之設計抵抗強度大於需要強度即可。但事實上以定值設計,其真正可靠度如何?地震發生時其破壞率如何?都無法預知。本文為瞭解依目前建築設計規範設計得之結構物之可靠度(reliability),乃以可靠性理論為依據,將設計中變異性較大之載重與桿件抗力強度,考慮為隨機變數,利用可靠性分析求出桿件之破壞機率 (probability of failure),藉以說明桿件在荷作重用下之破壞可能性。在文中,先分別建立鋼筋混凝土矩形梁及柱之可靠性分析作法,再將其應用以分析由梁柱組成之鋼筋混凝土構架之可靠性分析。最後,並舉一鋼筋混凝土構架實例,先依建築技術規則地震力部分及ACI code 318-83規範設計,再經由可靠性分析,求出各桿件之破壞機率,以明瞭現行設計規範設計之結構物的安全性。 |
英文摘要 | In conventional structural design, loading conditions and structural resistance are considered as deterministic values, and the member resisting strength is required to be greater than the member force. By this consideration, the saftey and reliability, which should be presented by the probability of failure, can not be assessed objectively. The reason is that the resisting strength and the input loads (for example, seismic excitations) all exist in a random manner. In order to investigate the reliability of structures whose design is based on the current Chinese Building Code, the design parameters, such as loading and yielding strength, are considered with proper distributions. The probability of failure of members can be calculated according to classical reliability theory. In the paper, reliability analysis for reinforced concrete rectangular beams and columns are conducted firstly and then extended to reinforced concrete frames which consist of beam and column elements. A design example for a reinforced concrete frame subjected to seismic load is presented in the paper to assess the saftey of the frame designed according to the current Chinese Building Code and ACI 318-83 code. |
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