發(fā)布時間：2018-07-28 16:45

【摘要】：隨著高層建筑結(jié)構(gòu)高度及高寬比的增大，由重力二階效應(yīng)產(chǎn)生的結(jié)構(gòu)附加彎矩逐漸成為了影響結(jié)構(gòu)整體穩(wěn)定的重要因素，而由此產(chǎn)生的傾覆力矩非線性增大是導(dǎo)致結(jié)構(gòu)整體失穩(wěn)倒塌的關(guān)鍵。目前已有研究主要是基于結(jié)構(gòu)彈性變形分析結(jié)構(gòu)的整體穩(wěn)定，而少有關(guān)注結(jié)構(gòu)進(jìn)入塑性階段后基于傾覆力矩的結(jié)構(gòu)整體穩(wěn)定分析。為此，本文將結(jié)構(gòu)整體失效過程中傾覆力矩作為重要判據(jù)，分析結(jié)構(gòu)失效過程中影響傾覆力矩的結(jié)構(gòu)狀態(tài)參數(shù)，確定該參數(shù)與傾覆力矩之間的量化關(guān)系，給出基于結(jié)構(gòu)傾覆力矩的整體失效判別指標(biāo)及量化評價方法。 彈性階段結(jié)構(gòu)傾覆力矩的推導(dǎo)。通過線性疊加的方法，推導(dǎo)了高層建筑結(jié)構(gòu)在彈性階段各樓層和基底傾覆力矩的計算公式，明確了傾覆力矩與結(jié)構(gòu)剛重比之間的關(guān)系。 塑性階段結(jié)構(gòu)傾覆力矩的推導(dǎo)。闡述了結(jié)構(gòu)瞬時等效抗側(cè)剛度的求解方法。通過增量疊加的方法，推導(dǎo)了高層建筑結(jié)構(gòu)進(jìn)入塑性階段后各樓層及基底傾覆力矩的計算公式。 結(jié)構(gòu)不同失效階段傾覆力矩的數(shù)值驗證。通過設(shè)計不同結(jié)構(gòu)參數(shù)的框架-核心筒結(jié)構(gòu)和斜交網(wǎng)格筒結(jié)構(gòu)有限元模型，進(jìn)行了結(jié)構(gòu)失效過程的數(shù)值分析，得到了結(jié)構(gòu)傾覆力矩在不同失效階段沿高度的變化規(guī)律，驗證了基底傾覆力矩在研究結(jié)構(gòu)整體失效分析中的合理性，在此基礎(chǔ)上描述了基底傾覆力矩塑性階段的發(fā)展過程。 基于基底傾覆力矩的失效判別方法。結(jié)合以上分析結(jié)果，建立了塑性階段結(jié)構(gòu)傾覆力矩的求解方法，并明確了塑性階段結(jié)構(gòu)瞬時基底剪力與結(jié)構(gòu)最大層間位移角的量化關(guān)系，推導(dǎo)了基底傾覆力矩在不同失效階段的量化公式，，在此基礎(chǔ)上提出了基于基底傾覆力矩的失效判別方法，并驗證了該失效判別指標(biāo)的正確性。
[Abstract]:With the increase of height and aspect ratio of tall buildings, the additional bending moment produced by the second-order gravity effect has gradually become an important factor affecting the overall stability of the structure. The nonlinear increase of the overturning moment is the key to the instability and collapse of the whole structure. At present, the research is mainly based on the structural elastic deformation analysis of the overall stability of the structure, but little attention has been paid to the overall stability analysis of the structure based on the overturning moment when the structure enters the plastic stage. Therefore, in this paper, the overturning moment in the course of structural failure is taken as an important criterion, and the structural state parameters which affect the overturning moment in the course of structural failure are analyzed, and the quantitative relationship between the parameters and the overturning moment is determined. Based on the structural overturning moment, the overall failure discriminant index and the quantitative evaluation method are presented. Derivation of overturning moment of structure in elastic stage. By the method of linear superposition, the formulas for calculating the overturning moment of each floor and base in the elastic stage of high-rise building are derived, and the relationship between the overturning moment and the rigid-weight ratio of the structure is clarified. Derivation of overturning moment in plastic stage. The method of solving the instantaneous equivalent lateral stiffness of the structure is presented. By the method of incremental superposition, the formulas for calculating the overturning moment of each floor and base after the high-rise building structure enters the plastic stage are derived. Numerical verification of overturning moment at different failure stages. By designing the finite element models of frame-core tube structure and oblique grid tube structure with different structural parameters, the structural failure process is numerically analyzed, and the variation law of the overturning moment along the height in different failure stages is obtained. The rationality of the base overturning moment in the structural failure analysis is verified, and the development process of the plastic stage of the base overturning moment is described. A method for identifying failure based on the overturning moment of the base is presented. Based on the above analysis results, a method for calculating the overturning moment of the structure in plastic stage is established, and the quantitative relationship between the instantaneous base shear force and the maximum interstory displacement angle of the structure in the plastic stage is clarified. The quantitative formulas of the subbase overturning torque at different failure stages are derived. Based on this, the method of judging the subbase overturning moment is proposed, and the validity of the failure discriminant index is verified.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU973.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前6條

1 吳甬春;張皖華;葉小剛;張傳略;鄭海峰;;塔吊傾覆力矩的計算[J];科技信息(科學(xué)教研);2007年24期

2 章南彪;朱亮;章瑞文;;山區(qū)地形塔吊傾覆力矩的計算[J];浙江建筑;2009年12期

3 羅繼偉;伍海云;;傾覆力矩對推力球軸承疲勞壽命的影響[J];軸承;2010年09期

4 崔冬權(quán);;基于規(guī)范下的貨物綁扎力計算及實例分析[J];江蘇船舶;2013年01期

5 王秋曉;孔波;汪飛;姜懷芳;;用于質(zhì)量特性參數(shù)測量的新型氣浮扭擺臺[J];航空學(xué)報;2014年03期

6 ;[J];;年期

相關(guān)碩士學(xué)位論文 前2條

1 石威宵;基于傾覆力矩的高層建筑結(jié)構(gòu)整體失效分析[D];哈爾濱工業(yè)大學(xué);2014年

2 楊萍;直立堤上波谷力和傾覆力矩的試驗研究[D];大連理工大學(xué);2013年

本文編號：2150923