本文關(guān)鍵詞：基于中歐規(guī)范混凝土梁正截面和斜截面承載力計算的對比研究　出處：《昆明理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鋼筋混凝土受彎構(gòu)件 正截面承載力 斜截面承載力 規(guī)范對比

【摘要】：本文針對我國現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計規(guī)范》在正截面和斜截面承載力計算中存在的不完善之處,分析其存在不完善的原因,從構(gòu)件在正截面和斜截面存在的問題入手,全面分析和對比歐洲現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計規(guī)范》和我國混凝土設(shè)計規(guī)范在計算兩者承載力方面的異同。下面具體說明在這兩方面所做的工作：(1)構(gòu)件正截面承載力計算方面：首先,對比分析我國現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計規(guī)范》和歐洲《混凝土結(jié)構(gòu)設(shè)計規(guī)范》在對構(gòu)件的正截面承載力計算中,都采用“等效矩形應(yīng)力模型”時給混凝土構(gòu)件的配筋計算帶來一些問題；進(jìn)一步深入研究歐洲《混凝土結(jié)構(gòu)設(shè)計規(guī)范》在針對自身缺陷時,怎樣從截面應(yīng)變分布出發(fā),再由應(yīng)變通過混凝土和鋼筋完整的本構(gòu)關(guān)系確定相應(yīng)的內(nèi)力值大小,進(jìn)而計算出截面的抵抗彎矩,及怎樣利用混凝土和鋼筋本構(gòu)關(guān)系,將構(gòu)件截面在不同受力狀態(tài)下的可能應(yīng)變分布,劃分為5個應(yīng)變區(qū)域并進(jìn)一步推導(dǎo)出方便、簡潔的構(gòu)件配筋計算新方法—無量綱圖表法。其次,針對我國現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計規(guī)范》雖然在6.2.1條中給出混凝土和鋼筋的本構(gòu)關(guān)系,但不能完整地利用它,而只能利用混凝土受壓極限應(yīng)變εc=-3.3‰這一點,給構(gòu)件的配筋計算帶來的問題,具體分析了導(dǎo)致這些問題存在的本質(zhì)原因,對改善規(guī)范的不完善和矛盾之處提出具體的建議。(2)構(gòu)件斜截面承載力計算方面：全面分析和比較我國現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計規(guī)范》和歐洲《混凝土結(jié)構(gòu)設(shè)計規(guī)范》的斜截面抗剪承載力計算理論,深刻理解和學(xué)習(xí)歐洲《混凝土結(jié)構(gòu)設(shè)計規(guī)范》是怎樣利用桁架抗剪模型,清晰地解釋構(gòu)件的抗剪受力機(jī)理,并基于桁架模型建立起一套系統(tǒng)、全面的抗剪計算公式,希望能夠從中借鑒和汲取其系統(tǒng)、科學(xué)、先進(jìn)的計算理論體系及設(shè)計理念,從而為完善和改進(jìn)我國《混凝土結(jié)構(gòu)設(shè)計規(guī)范》在這方面的計算理論提供必要的理論依據(jù)。
[Abstract]:In view of the imperfections in the calculation of the bearing capacity of normal and oblique sections in the present Code for Design of concrete structures in China, this paper analyzes the reasons for the imperfections in the calculation of the bearing capacity of normal sections and oblique sections. Starting with the problems of members in normal section and oblique section. A comprehensive analysis and comparison of the existing European Code for the Design of concrete structures and the differences in the calculation of their bearing capacity between the existing European Code for Design of concrete structures and the Code for concrete Design in China. The following is a detailed description of the work done in these two areas: 1). The calculation of normal section bearing capacity of members is as follows: first of all. This paper compares and analyzes the present concrete structure Design Code in China and the European concrete structure Design Code in the calculation of the normal section bearing capacity of the members. When "equivalent rectangular stress model" is adopted, it brings some problems to the reinforcement calculation of concrete members. Further further study on the European Code for Design of concrete structures in view of their own defects, how to proceed from the cross-section strain distribution. Then through the complete constitutive relation of concrete and steel bar, the corresponding internal force is determined, and then the resistance moment of section is calculated, and how to use the constitutive relation of concrete and steel bar is calculated. The possible strain distribution of the member section under different stress states is divided into five strain regions and a new convenient and concise method for calculating the reinforcement of the member is presented. Secondly, the dimensionless chart method is used. Although the constitutive relation between concrete and steel bar is given in 6.2.1, the present Code for Design of concrete structures in China can not make full use of it. The ultimate strain of concrete under compression 蔚 c ~ (3) 鈥，

本文編號：1406014