带转换高层框架结构基于变形和损伤的抗震性能评估方法研究
发布时间：2019-05-18 14:38
【摘要】：随着我国经济高速发展，为了满足建筑功能多样化的要求，出现大量带转换层的竖向不规则结构。由于钢-混凝土组合构件具有优越的力学性能，广泛应用于带转换层的建筑结构中，以达到提高转换结构抗震性能的目的。在本文分析算例中，带转换高层框架结构主要采用钢管混凝土柱和型钢混凝土梁作为转换构件。震害调查和分析研究表明，强震下带转换层竖向不规则结构的变形集中与能量积聚出现在转换层处，在转换层及其相邻楼层处形成层侧移破坏机制，引起结构发生局部或整体倒塌破坏。即使严格按照规范进行抗震设计，在强震下结构进入弹塑性状态后，以单一变形性能指标进行的抗震设计，也不能有效地控制带转换层竖向不规则结构的地震损伤破坏。针对上述问题，考虑到结构破坏与最大变形和累积滞回耗能相关，提出基于变形(结构最大层间位移角)和损伤(结构整体损伤指数)的双系统抗震性能评估方法，弥补采用单一抗震性能评估指标的缺陷。从地震易损性层面上，评估带转换层竖向不规则这类结构的抗震可靠性。 本文主要开展以下几个方面的研究工作： (1)出于结构破坏实质是地震输入能量超过结构所能消耗能量的考虑，对带转换高层框架结构累积滞回耗能分布进行研究。对比分析在不同地震动作用下结构最大层位移角和地震损伤分布是否一致。研究表明采用单一的变形指标，不能全面地评估带转换层竖向不规则结构的抗震性能，有必要建立基于变形和损伤的双系统抗震性能评估方法。 (2)基于变形和损伤的双系统抗震性能评估方法是建立在地震易损性分析的基础上，地震动强度参数选取的合理性，直接影响结构地震易损性分析的正确性。根据大量动力非线性时程分析结果，，对各个地震动强度参数与结构最大地震响应进行对数线性回归分析，以相关系数、标准差、线性回归方程斜率作为参数选取指标，选取出与结构地震响应关系最密切的地震动强度参数，为以变形和损伤为性能指标的地震易损性评估方法研究提供合理的地震动强度参数。 (3)由于采用单一地震动强度参数不能充分地反映地震动特性对结构易损性的影响，因此在完成地震动强度参数选取研究的基础上，以结构最大层间位移角为性能指标，考虑地震动三要素中振幅和频谱特性的影响，进行能够考虑多个地震动特性参数的地震易损性曲面分析，建立基于变形的地震易损性评估方法。计算分析表明，基于结构最大层间位移角的地震易损性分析，低估了带转换高层框架结构发生重度损伤破坏的概率，有必要补充以损伤为指标的地震易损性评估方法。 (4)在以损伤为性能指标的地震易损性评估方法中，结构整体损伤指数是通过结构构件损伤指数推算出来，因此首先需要对结构构件的地震损伤模型进行研究。由于带转换高层框架结构中，采用钢管混凝土柱和型钢混凝土梁作为转换构件，综合考虑损伤模型研究现状和钢-混凝土组合构件滞回特性后，首先，选取和修正基于累积滞回耗能的Kratzig损伤模型，用于钢管混凝土柱的地震损伤评估。然后，利用基于累积滞回耗能的梁柱损伤比，推算出型钢混凝土转换梁的损伤指数。最后，通过一系列组合构件的抗震性能试验，校验修正的Kratzig损伤模型和基于梁柱损伤比的推算方法是正确与合理。 (5)在完成构件地震损伤模型修正与校验后，探究从构件层次到楼层层次、结构整体层次的损伤演化过程，建立以结构整体损伤指数为性能指标的地震易损性评估方法，用于带转换高层框架结构的抗震可靠性评估。在构件损伤推算出楼层损伤过程中，采用引入构件重要性系数的加权组合方式进行计算。在楼层损伤推算出结构整体损伤过程中，提出了基于累积滞回耗能的楼层损伤分布系数，合理地简化从楼层损伤指数到结构整体损伤指数的计算过程。计算分析表明，基于结构整体损伤指数的地震易损性曲面分析，能较合理地评估带转换高层框架结构发生重度损伤破坏的概率。 (6)构建基于变形和损伤的双系统抗震性能评估方法，系统介绍该评估方法的实现步骤。将基于双系统的抗震性能评估方法应用到带转换高层框架结构的抗震可靠性分析中，并且分别从结构整体损伤和构件损伤两个方面，评估带转换高层框架结构的抗震性能。结构整体损伤评估表明，当结构处于基本完好和轻度损伤破坏状态时，评估主控参数可以采用结构最大层位移角。当结构处于中度和重度损伤破坏状态时，评估主控参数可以采用结构整体损伤指数。结构构件损伤评估表明，强震下带转换高层框架结构损伤破坏集中发生在底层与转换层的钢管混凝土柱和钢筋混凝土框架梁上。随地震动强度增大，钢管混凝土柱损伤加剧。最终，由于结构底层与转换层发生严重的损伤破坏引起结构发生整体破坏。
[Abstract]:With the rapid development of our country's economy, in order to meet the requirement of diversified building function, a large number of vertical irregular structures with the conversion layer appear. Due to the excellent mechanical property of the steel-concrete composite component, the steel-concrete composite component is widely applied to the building structure with the conversion layer, so as to achieve the purpose of improving the anti-seismic performance of the conversion structure. In that example of this paper, the high-rise frame structure of the band is adopt as the conversion component of the steel tube concrete column and the section steel concrete beam. The investigation and analysis of the earthquake damage show that the deformation concentration and energy accumulation of the vertical irregular structure of the transition layer under strong earthquake are in the conversion layer, and the side-shift failure mechanism is formed at the conversion layer and its adjacent floor to cause local or integral collapse of the structure. Even if the seismic design is carried out in strict accordance with the specification, the seismic damage of the vertical irregular structure with the conversion layer cannot be effectively controlled after the structure enters the elastic-plastic state under the strong earthquake, and the seismic design with the single deformation performance index can not be effectively controlled. In view of the above problems, considering that the structural failure is related to the maximum deformation and the accumulated hysteretic energy consumption, a two-system anti-seismic performance evaluation method based on the deformation (structure maximum interlayer displacement angle) and damage (structural integral damage index) is proposed to make up for the deficiency of the single seismic performance evaluation index. The seismic reliability of the structure with the vertical irregularity of the transition layer is evaluated from the seismic vulnerability level. This paper mainly studies the following aspects: Work: (1) For structural damage, the seismic input energy is more than the energy consumption of the structure, and the accumulated hysteretic energy consumption of the high-rise frame structure with the conversion is divided A comparative analysis of the maximum displacement angle and the seismic damage of the structure under different vibration effects Whether the cloth is consistent or not. The study shows that using a single deformation index, it is not possible to comprehensively evaluate the seismic performance of the vertical irregular structure with the conversion layer, and it is necessary to establish the two-system earthquake resistance based on deformation and damage The method can be evaluated. (2) The seismic performance evaluation method based on the deformation and damage is based on the seismic vulnerability analysis. The rationality of the selection of the ground motion intensity parameters is the direct influence on the structural earthquake. Based on a large number of dynamic nonlinear time-history analysis results, the log-linear regression analysis of the vibration intensity parameters and the structure's maximum seismic response is carried out, and the correlation coefficient, the standard deviation and the slope of the linear regression equation are calculated. As a parameter selection index, the most closely related seismic intensity parameters of structural seismic response are selected to provide a reasonable method for seismic vulnerability assessment based on deformation and damage as a performance index. and (3) because the influence of the vibration characteristics on the structure vulnerability cannot be adequately reflected by adopting the single ground vibration intensity parameter, the structure is the most The large interlayer displacement angle is the performance index, and the influence of the amplitude and frequency spectrum characteristics of the three elements is considered, and the seismic vulnerability surface analysis with multiple ground motion characteristic parameters can be considered, which is based on the change The seismic vulnerability assessment method based on the structure's maximum interlayer displacement angle is based on the analysis of the seismic vulnerability of the structure's maximum interlayer displacement angle. The probability of severe damage to the high-rise frame structure is underestimated, and it is necessary to add the damage as the finger. and (4) in the method for evaluating the earthquake vulnerability based on the damage, the overall damage index of the structure is calculated by the structural component damage index, The seismic damage model of the structural member is studied in this paper. Because of the high-rise frame structure of the belt, the steel-tube concrete column and the section steel concrete beam are used as the conversion component, and the research status of the damage model and the hysteretic characteristics of the steel-concrete composite component are comprehensively considered. The Kratzg Damage Model of Energy Consumption and Its Application The seismic damage assessment of the steel tube concrete column is carried out. The beam-to-column damage ratio based on the accumulated hysteretic energy consumption is then calculated. The damage index of the section steel concrete conversion beam is calculated. Finally, the modified Kratzig damage model and the beam-column are verified by the anti-seismic performance test of a series of composite members. The estimation method of the damage ratio is correct and reasonable. (5) After the correction and verification of the structural earthquake damage model, the damage evolution process from the component level to the level of the floor and the whole structure of the structure is explored, and the structural integral damage is established. An index-based seismic vulnerability assessment method for seismic vulnerability assessment An anti-seismic reliability assessment with a high-rise frame structure is presented. In the process of building up the damage of the floor, the introduction structure is adopted. The weighted combination of the importance coefficient of the building is calculated. In the course of the overall damage of the structure, the floor damage distribution coefficient based on the accumulated hysteretic energy consumption is put forward, and the loss from the floor is reasonably simplified. The calculation of the damage index to the whole damage index of the structure shows that the seismic vulnerability surface analysis based on the whole damage index of the structure can evaluate the band conversion reasonably. The probability of severe damage to the high-rise frame structure. (6) Construction of the two-system shock resistance based on deformation and damage The method can be evaluated, and the implementation step of the evaluation method is presented in the system. The seismic performance evaluation method based on the double system is applied to the seismic reliability analysis of the band-conversion high-rise frame structure, and the structural integral damage and the component damage are respectively obtained from the structural integral damage and the component damage. In one aspect, the seismic performance of the high-rise frame structure is assessed. The structural overall damage assessment shows that when the structure is in a state of substantially intact and mild damage The maximum layer displacement angle of the structure can be used for evaluating the main control parameters when the structure is in the state of moderate and severe damage failure. The damage evaluation of the structural component shows that the damage and destruction of the high-rise frame structure under strong earthquake occurs in the bottom layer and the bottom layer. Steel pipe concrete column and reinforced concrete frame beam of the conversion layer and the damage of the concrete column of the steel pipe is increased, and finally, due to the structure bottom layer and the conversion,
【学位授予单位】：华南理工大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU973.31
本文编号：2480091
[Abstract]:With the rapid development of our country's economy, in order to meet the requirement of diversified building function, a large number of vertical irregular structures with the conversion layer appear. Due to the excellent mechanical property of the steel-concrete composite component, the steel-concrete composite component is widely applied to the building structure with the conversion layer, so as to achieve the purpose of improving the anti-seismic performance of the conversion structure. In that example of this paper, the high-rise frame structure of the band is adopt as the conversion component of the steel tube concrete column and the section steel concrete beam. The investigation and analysis of the earthquake damage show that the deformation concentration and energy accumulation of the vertical irregular structure of the transition layer under strong earthquake are in the conversion layer, and the side-shift failure mechanism is formed at the conversion layer and its adjacent floor to cause local or integral collapse of the structure. Even if the seismic design is carried out in strict accordance with the specification, the seismic damage of the vertical irregular structure with the conversion layer cannot be effectively controlled after the structure enters the elastic-plastic state under the strong earthquake, and the seismic design with the single deformation performance index can not be effectively controlled. In view of the above problems, considering that the structural failure is related to the maximum deformation and the accumulated hysteretic energy consumption, a two-system anti-seismic performance evaluation method based on the deformation (structure maximum interlayer displacement angle) and damage (structural integral damage index) is proposed to make up for the deficiency of the single seismic performance evaluation index. The seismic reliability of the structure with the vertical irregularity of the transition layer is evaluated from the seismic vulnerability level. This paper mainly studies the following aspects: Work: (1) For structural damage, the seismic input energy is more than the energy consumption of the structure, and the accumulated hysteretic energy consumption of the high-rise frame structure with the conversion is divided A comparative analysis of the maximum displacement angle and the seismic damage of the structure under different vibration effects Whether the cloth is consistent or not. The study shows that using a single deformation index, it is not possible to comprehensively evaluate the seismic performance of the vertical irregular structure with the conversion layer, and it is necessary to establish the two-system earthquake resistance based on deformation and damage The method can be evaluated. (2) The seismic performance evaluation method based on the deformation and damage is based on the seismic vulnerability analysis. The rationality of the selection of the ground motion intensity parameters is the direct influence on the structural earthquake. Based on a large number of dynamic nonlinear time-history analysis results, the log-linear regression analysis of the vibration intensity parameters and the structure's maximum seismic response is carried out, and the correlation coefficient, the standard deviation and the slope of the linear regression equation are calculated. As a parameter selection index, the most closely related seismic intensity parameters of structural seismic response are selected to provide a reasonable method for seismic vulnerability assessment based on deformation and damage as a performance index. and (3) because the influence of the vibration characteristics on the structure vulnerability cannot be adequately reflected by adopting the single ground vibration intensity parameter, the structure is the most The large interlayer displacement angle is the performance index, and the influence of the amplitude and frequency spectrum characteristics of the three elements is considered, and the seismic vulnerability surface analysis with multiple ground motion characteristic parameters can be considered, which is based on the change The seismic vulnerability assessment method based on the structure's maximum interlayer displacement angle is based on the analysis of the seismic vulnerability of the structure's maximum interlayer displacement angle. The probability of severe damage to the high-rise frame structure is underestimated, and it is necessary to add the damage as the finger. and (4) in the method for evaluating the earthquake vulnerability based on the damage, the overall damage index of the structure is calculated by the structural component damage index, The seismic damage model of the structural member is studied in this paper. Because of the high-rise frame structure of the belt, the steel-tube concrete column and the section steel concrete beam are used as the conversion component, and the research status of the damage model and the hysteretic characteristics of the steel-concrete composite component are comprehensively considered. The Kratzg Damage Model of Energy Consumption and Its Application The seismic damage assessment of the steel tube concrete column is carried out. The beam-to-column damage ratio based on the accumulated hysteretic energy consumption is then calculated. The damage index of the section steel concrete conversion beam is calculated. Finally, the modified Kratzig damage model and the beam-column are verified by the anti-seismic performance test of a series of composite members. The estimation method of the damage ratio is correct and reasonable. (5) After the correction and verification of the structural earthquake damage model, the damage evolution process from the component level to the level of the floor and the whole structure of the structure is explored, and the structural integral damage is established. An index-based seismic vulnerability assessment method for seismic vulnerability assessment An anti-seismic reliability assessment with a high-rise frame structure is presented. In the process of building up the damage of the floor, the introduction structure is adopted. The weighted combination of the importance coefficient of the building is calculated. In the course of the overall damage of the structure, the floor damage distribution coefficient based on the accumulated hysteretic energy consumption is put forward, and the loss from the floor is reasonably simplified. The calculation of the damage index to the whole damage index of the structure shows that the seismic vulnerability surface analysis based on the whole damage index of the structure can evaluate the band conversion reasonably. The probability of severe damage to the high-rise frame structure. (6) Construction of the two-system shock resistance based on deformation and damage The method can be evaluated, and the implementation step of the evaluation method is presented in the system. The seismic performance evaluation method based on the double system is applied to the seismic reliability analysis of the band-conversion high-rise frame structure, and the structural integral damage and the component damage are respectively obtained from the structural integral damage and the component damage. In one aspect, the seismic performance of the high-rise frame structure is assessed. The structural overall damage assessment shows that when the structure is in a state of substantially intact and mild damage The maximum layer displacement angle of the structure can be used for evaluating the main control parameters when the structure is in the state of moderate and severe damage failure. The damage evaluation of the structural component shows that the damage and destruction of the high-rise frame structure under strong earthquake occurs in the bottom layer and the bottom layer. Steel pipe concrete column and reinforced concrete frame beam of the conversion layer and the damage of the concrete column of the steel pipe is increased, and finally, due to the structure bottom layer and the conversion,
【学位授予单位】：华南理工大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU973.31
本文编号：2480091
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