【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型為主的多種構造形式的新型組合剪力墻-鋼管束組合剪力墻。作為結構體系的主要的抗豎向力和抗側向力構件,具有鋼管壁薄、用鋼量經(jīng)濟、施工速度快、構件制作簡單、自重輕等優(yōu)點,有著廣闊的適用性和經(jīng)濟社會效益。作為一種新型結構形式,其抗震性能需要深入的研究。本文深入、系統(tǒng)地對鋼管束組合鋼板剪力墻進行試驗研究、數(shù)值模擬及理論分析,主要研究內容如下:(1)設計了7個與實際工程完全相同的1:1足尺的一字型鋼管束組合剪力墻模型,對其進行低周反復荷載作用下的擬靜力試驗研究;進行了不同軸壓比、剪跨比、U型鋼截面尺寸、是否布置栓釘?shù)膶Ρ鹊难芯?通過試驗揭示墻體的破壞機制、受力機理,分析了各個參數(shù)對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的影響;并對墻體的剪切變形、側向變形、關鍵部分的應變進行了研究,分析了墻體的變形機制。(2)與一字型鋼管束組合剪力墻相對比,設計了5個與實際工程完全相符的1:1足尺的T型鋼管束組合剪力墻模型,對其進行低周反復荷載作用下的試驗研究;進行了不同軸壓比、腹板端剪跨比、腹板端U型鋼截面尺寸、是否布置栓釘?shù)膶Ρ?通過實驗揭示T型墻體的破壞機制、受力機理,分析了各個參數(shù)對T型組合剪力墻的滯回曲線、骨架曲線、承載能力、強度及剛度退化、位移延性系數(shù)及耗能能力等抗震性能的影響,并對T型墻體的剪切變形、側向變形、關鍵部分的應變進行了研究,分析了T型墻體的變形機制。(3)采用非線性有限元軟件對鋼管束組合鋼板剪力墻進行數(shù)值模擬,用試驗結果驗證了有限元分析結果的正確性,并對墻體進行了受力全過程分析,研究了鋼管束組合剪力墻應力、應變分布規(guī)律,得到了剪力墻的受力機理和破壞模式,在此基礎上通過參數(shù)化分析系統(tǒng)的研究了軸壓比、剪跨比、鋼材強度、混凝土強度、鋼板厚度、U型鋼截面尺寸等參數(shù)對鋼管束組合剪力墻抗震性能的影響。(4)在試驗數(shù)據(jù)和有限元參數(shù)化分析的基礎上,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,推導了適用于鋼管束組合剪力墻正截面壓彎承載力的計算公式;通過分析低剪跨比的鋼管束組合剪力墻的受力模式并對影響抗剪承載力的各種因素進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成,基于疊加理論并通過統(tǒng)計計算回歸出參數(shù)值,給出抗剪承載力計算公式。(5)在低周反復荷載試驗研究的基礎上,結合鋼管束組合剪力墻的滯回曲線和恢復力特性研究,得到鋼管束組合剪力墻骨架曲線的3折線簡化計算模型;同時對鋼管束組合剪力墻剛度退化規(guī)律以及基于試驗現(xiàn)象的滯回規(guī)則進行分析,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力模型;并給出鋼管束組合剪力墻抗震設計建議。
[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.
【學位授予單位】：天津大學
【學位級別】：博士
【學位授予年份】：2016
【分類號】：TU398.2;TU352.11
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本文編號：2480890