【摘要】：鋼管束組合剪力墻是一種鋼與混凝土組合的剪力墻,由不同截面形式的U型鋼連接而成,內(nèi)部澆筑混凝土,形成一種以一字型、T型、L型、Z型為主的多種構(gòu)造形式的新型組合剪力墻-鋼管束組合剪力墻。作為結(jié)構(gòu)體系的主要的抗豎向力和抗側(cè)向力構(gòu)件,具有鋼管壁薄、用鋼量經(jīng)濟(jì)、施工速度快、構(gòu)件制作簡單、自重輕等優(yōu)點(diǎn),有著廣闊的適用性和經(jīng)濟(jì)社會(huì)效益。作為一種新型結(jié)構(gòu)形式,其抗震性能需要深入的研究。本文深入、系統(tǒng)地對(duì)鋼管束組合鋼板剪力墻進(jìn)行試驗(yàn)研究、數(shù)值模擬及理論分析,主要研究內(nèi)容如下:(1)設(shè)計(jì)了7個(gè)與實(shí)際工程完全相同的1:1足尺的一字型鋼管束組合剪力墻模型,對(duì)其進(jìn)行低周反復(fù)荷載作用下的擬靜力試驗(yàn)研究;進(jìn)行了不同軸壓比、剪跨比、U型鋼截面尺寸、是否布置栓釘?shù)膶?duì)比的研究;通過試驗(yàn)揭示墻體的破壞機(jī)制、受力機(jī)理,分析了各個(gè)參數(shù)對(duì)一字型鋼管束組合剪力墻的滯回曲線、骨架曲線、破壞形態(tài)、承載能力、強(qiáng)度及剛度退化、位移延性系數(shù)及耗能能力等抗震性能指標(biāo)的影響;并對(duì)墻體的剪切變形、側(cè)向變形、關(guān)鍵部分的應(yīng)變進(jìn)行了研究,分析了墻體的變形機(jī)制。(2)與一字型鋼管束組合剪力墻相對(duì)比,設(shè)計(jì)了5個(gè)與實(shí)際工程完全相符的1:1足尺的T型鋼管束組合剪力墻模型,對(duì)其進(jìn)行低周反復(fù)荷載作用下的試驗(yàn)研究;進(jìn)行了不同軸壓比、腹板端剪跨比、腹板端U型鋼截面尺寸、是否布置栓釘?shù)膶?duì)比;通過實(shí)驗(yàn)揭示T型墻體的破壞機(jī)制、受力機(jī)理,分析了各個(gè)參數(shù)對(duì)T型組合剪力墻的滯回曲線、骨架曲線、承載能力、強(qiáng)度及剛度退化、位移延性系數(shù)及耗能能力等抗震性能的影響,并對(duì)T型墻體的剪切變形、側(cè)向變形、關(guān)鍵部分的應(yīng)變進(jìn)行了研究,分析了T型墻體的變形機(jī)制。(3)采用非線性有限元軟件對(duì)鋼管束組合鋼板剪力墻進(jìn)行數(shù)值模擬,用試驗(yàn)結(jié)果驗(yàn)證了有限元分析結(jié)果的正確性,并對(duì)墻體進(jìn)行了受力全過程分析,研究了鋼管束組合剪力墻應(yīng)力、應(yīng)變分布規(guī)律,得到了剪力墻的受力機(jī)理和破壞模式,在此基礎(chǔ)上通過參數(shù)化分析系統(tǒng)的研究了軸壓比、剪跨比、鋼材強(qiáng)度、混凝土強(qiáng)度、鋼板厚度、U型鋼截面尺寸等參數(shù)對(duì)鋼管束組合剪力墻抗震性能的影響。(4)在試驗(yàn)數(shù)據(jù)和有限元參數(shù)化分析的基礎(chǔ)上,分析了影響鋼管束組合剪力墻承載力的主要因素,基于疊加理論,推導(dǎo)了適用于鋼管束組合剪力墻正截面壓彎承載力的計(jì)算公式;通過分析低剪跨比的鋼管束組合剪力墻的受力模式并對(duì)影響抗剪承載力的各種因素進(jìn)行非線性有限元分析,得出鋼管束組合剪力墻抗剪承載力的構(gòu)成,基于疊加理論并通過統(tǒng)計(jì)計(jì)算回歸出參數(shù)值,給出抗剪承載力計(jì)算公式。(5)在低周反復(fù)荷載試驗(yàn)研究的基礎(chǔ)上,結(jié)合鋼管束組合剪力墻的滯回曲線和恢復(fù)力特性研究,得到鋼管束組合剪力墻骨架曲線的3折線簡化計(jì)算模型;同時(shí)對(duì)鋼管束組合剪力墻剛度退化規(guī)律以及基于試驗(yàn)現(xiàn)象的滯回規(guī)則進(jìn)行分析,得到墻體的滯回規(guī)律;基于3折線骨架曲線和滯回規(guī)律,建立鋼管束組合鋼板剪力墻恢復(fù)力模型;并給出鋼管束組合剪力墻抗震設(shè)計(jì)建議。
[Abstract]:The steel tube bundle combined shear wall is a shear wall combined with steel and concrete, and is formed by connecting U-shaped steel in different cross-section forms, Z-type combined shear wall-steel tube bundle combined shear wall. As the main anti-vertical force and the anti-lateral force component of the structural system, the invention has the advantages of being thin in steel pipe wall, economical in steel quantity, fast in construction speed, simple in component manufacture, light in self-weight and the like, and has wide applicability and economic and social benefits. As a new type of structure, its anti-seismic performance needs to be studied in-depth. In this paper, the experimental research, numerical simulation and theoretical analysis of the steel tube bundle combined steel plate shear wall are systematically studied. The main contents of this paper are as follows: (1) The model of a 1:1 foot-type steel tube bundle combined shear wall with exactly the same actual project is designed. The research on the quasi-static test under the action of low-cycle and repeated loading is carried out, and the comparison of the different axial compression ratio, the shear span ratio, the section size of the U-shaped steel and whether the bolt is arranged is carried out, and the failure mechanism and the stress mechanism of the wall body are disclosed by the test. The influence of various parameters on the hysteretic curve, the skeleton curve, the damage form, the bearing capacity, the strength and the stiffness degradation, the displacement ductility coefficient and the energy dissipation capacity of the combined shear wall of a word type steel tube bundle is analyzed, and the shear deformation and lateral deformation of the wall body are analyzed, The strain of the key part is studied, and the deformation mechanism of the wall is analyzed. (2) Compared with a word-type steel tube bundle combined shear wall, a 1:1 foot-scale T-shaped steel tube bundle combined shear wall model which is fully matched with the actual project is designed, and the test research under the action of low-cycle repeated loading is carried out; the different axial compression ratio, the web end shear span ratio, The section size of the U-shaped section of the web end and the comparison of the bolt are arranged. The failure mechanism and the force mechanism of the T-shaped wall are revealed by the experiment, and the hysteresis curve, the skeleton curve, the bearing capacity, the strength and the stiffness of the T-type combined shear wall are analyzed. The influence of displacement ductility factor and energy dissipation capacity on the seismic performance of T-shaped wall is studied, and the deformation mechanism of T-type wall is analyzed. (3) The numerical simulation of the steel tube bundle combined steel plate shear wall with the non-linear finite element software is carried out. The correctness of the finite element analysis results is verified by the test results, and the stress and strain distribution of the combined shear wall of the steel tube bundle are studied. The effect of axial compression ratio, shear span ratio, steel strength, concrete strength, thickness of steel plate and section size of U-shaped steel on the anti-seismic performance of steel tube bundle combined shear wall is studied. (4) On the basis of the experimental data and the finite element parametric analysis, the main factors affecting the bearing capacity of the combined shear wall of the steel tube bundle are analyzed, and the calculation formula of the bending bearing capacity of the positive section of the combined shear wall of the steel tube bundle is derived based on the superposition theory. By analyzing the stress mode of the steel tube bundle combined shear wall with the low shear span ratio and the non-linear finite element analysis of various factors affecting the shear bearing capacity, the composition of the shear bearing capacity of the steel tube bundle combined shear wall is obtained, and the parameter value is calculated by statistical calculation based on the superposition theory, The calculation formula of shear bearing capacity is given. (5) Based on the low-cycle repeated load test, the three-fold line simplified calculation model of the steel tube bundle combined shear wall skeleton curve is obtained by combining the hysteresis curve and the restoring force characteristic of the steel tube bundle combined shear wall. At the same time, the stiffness degradation law of the steel tube bundle combined shear wall and the hysteresis rule based on the test phenomenon are analyzed to obtain the hysteresis rule of the wall body, and the restoring force model of the steel tube bundle combined steel plate shear wall is established based on the 3-fold line framework curve and the hysteresis rule. The anti-seismic design proposal of steel tube bundle combined shear wall is given.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU398.2;TU352.11
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本文編號(hào)：2480890