本文選題：高溫 + 型鋼混凝土��； 參考：《寧波大學(xué)》2013年碩士論文

【摘要】：本文通過對型鋼混凝土推出試驗(yàn)的研究，分析了高溫及高溫后型鋼混凝土的粘結(jié)強(qiáng)度、平均粘結(jié)應(yīng)力與滑移的相互關(guān)系，確定粘結(jié)強(qiáng)度與火災(zāi)高溫溫度、高溫冷卻后曾經(jīng)經(jīng)歷溫度之間的關(guān)系，建立了與溫度或曾經(jīng)經(jīng)歷溫度相關(guān)的粘結(jié)強(qiáng)度計(jì)算公式和粘結(jié)應(yīng)力-滑移本構(gòu)關(guān)系，為型鋼混凝土考慮粘結(jié)滑移的抗火性能與火災(zāi)后力學(xué)性能數(shù)值模擬分析提供了條件。 首先分析了常溫下型鋼混凝土粘結(jié)滑移試驗(yàn)的相關(guān)試驗(yàn)方法和現(xiàn)階段的成果，確定了采用推出試驗(yàn)來研究分析高溫及高溫后型鋼混凝土粘結(jié)滑移性能。再者通過對國內(nèi)外高溫及高溫后鋼筋混凝土粘結(jié)滑移性能的試驗(yàn)方法，同時(shí)參考國內(nèi)外高溫及高溫后鋼筋混凝土粘結(jié)滑移性能試驗(yàn)研究中所采用的升溫爐，設(shè)計(jì)了一種新型電加熱升溫爐，成功的實(shí)現(xiàn)了對升溫爐的爐內(nèi)溫度長時(shí)間保持在某一恒定溫度下的要求。 試驗(yàn)設(shè)計(jì)了高溫下18個(gè)型鋼混凝土柱、高溫后18個(gè)型鋼混凝土柱以及3個(gè)常溫下對比的型鋼混凝土柱，主要考察了升溫最高溫度、最高溫度持續(xù)時(shí)間、型鋼埋置長度、型鋼保護(hù)層厚度四個(gè)因素對粘結(jié)強(qiáng)度以及粘結(jié)滑移本構(gòu)關(guān)系的影響。通過布置在試件加載端的位移計(jì)來測量型鋼混凝土推出過程的滑移量。 為分析高溫下及高溫后型鋼混凝土的粘結(jié)滑移機(jī)理，對整個(gè)試驗(yàn)過程進(jìn)行了詳細(xì)的觀察和記錄。根據(jù)試驗(yàn)所測得的數(shù)據(jù)，從而得到平均粘結(jié)應(yīng)力-滑移曲線。對整個(gè)試驗(yàn)過程試件的荷載滑移曲線提取了平均極限粘結(jié)強(qiáng)度以及相對應(yīng)的滑移量和平均殘余粘結(jié)強(qiáng)度以及相對應(yīng)的滑移量的特征值來歸納分析粘結(jié)應(yīng)力-滑移的曲線特征。通過分析升溫最高溫度、最高溫度持續(xù)時(shí)間對平均極限粘結(jié)強(qiáng)度、平均殘余粘結(jié)強(qiáng)度以及它們相對應(yīng)的滑移值的影響，統(tǒng)計(jì)回歸得到了這個(gè)四個(gè)特征值的計(jì)算公式，并建立了高溫及高溫后型鋼混凝土的粘結(jié)滑移本構(gòu)關(guān)系。
[Abstract]:In this paper, the bond strength, the relationship between average bond stress and slip of SRC at high temperature and after high temperature are analyzed, and the bond strength and fire temperature are determined. The bond strength formula and bond stress-slip constitutive relation related to temperature or temperature have been established. It provides the condition for numerical simulation analysis of fire resistance and mechanical properties of steel reinforced concrete considering bond-slip. This paper first analyzes the relevant test methods and the present results of the bond slip test of SRC at room temperature, and determines that the push-out test is used to study and analyze the bond-slip behavior of SRC at high temperature and after high temperature. Furthermore, through the domestic and foreign high temperature and after high temperature reinforced concrete bond-slip performance test methods, at the same time referring to the domestic and foreign high temperature and high temperature reinforced concrete bond-slip behavior test research used in the heating furnace, A new type of electric heating furnace is designed, which successfully meets the requirement of keeping the temperature in the furnace at a constant temperature for a long time. 18 steel reinforced concrete columns at high temperature, 18 steel reinforced concrete columns after high temperature and 3 steel reinforced concrete columns compared at normal temperature were designed. The maximum temperature, duration of maximum temperature, length of embedded section steel were investigated. The influence of four factors on bond strength and bond-slip constitutive relation. The slip of SRC is measured by means of a displacement meter arranged at the loading end of the specimen. In order to analyze the bond-slip mechanism of SRC at high temperature and after high temperature, the whole test process was observed and recorded in detail. According to the experimental data, the average bond stress-slip curve is obtained. Based on the load-slip curves of the specimens during the whole test process, the characteristic values of the average ultimate bond strength, the corresponding slip amount, the average residual bond strength and the corresponding slip amount were extracted to conclude and analyze the characteristics of the bond stress-slip curve. By analyzing the effects of the maximum temperature and the duration of the maximum temperature on the average ultimate bond strength, the average residual bond strength and their corresponding slip values, the four eigenvalues are calculated by statistical regression. The bond-slip constitutive relation of SRC at high temperature and after high temperature is established.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU398.9

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