CN110032824A - A kind of engineering structure seismic design based on displacement method - Google Patents
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Abstract
本发明通过计算位移角限值可以极好的反应受力和变形性能，通过阻尼比可以推出相应位移角限值的屈服位移从而确定需求，根据结构的结构质量和强度采用假设值可以反应在实际结构中其最容易受影响环节的极限状态从而确定结构是否可行，通过对不同性能水平进行的设计计算可以模拟在遇到不同程度地震时的表现性能，进行性能控制，使用位移结构来抵御地震是一种很可靠地方法，在基于位移的抗震设计基础上，设计者需要更好的控制结构在地震来临过程中的承受行为，防止因为结构变性能力不足而引起的破坏，因此在以后的抗震设计中，我们需要一种能够有效控制建筑破坏状态使建筑物在期周期中达到抗震最高性能的方法，减少灾害费用和提高安全性。By calculating the displacement angle limit, the present invention can perfectly reflect the stress and deformation performance, and through the damping ratio, the yield displacement of the corresponding displacement angle limit can be deduced to determine the demand. According to the structural quality and strength of the structure, the assumed value can reflect the actual The limit state of the most easily affected link in the structure is to determine whether the structure is feasible. Through the design calculation of different performance levels, the performance performance in the event of earthquakes of different degrees can be simulated, and the performance can be controlled. Using displacement structures to resist earthquakes is a A very reliable method. On the basis of the displacement-based seismic design, the designer needs to better control the bearing behavior of the structure in the process of earthquake, and prevent the damage caused by insufficient structural denaturation ability. Therefore, in the future seismic design In this paper, we need a method that can effectively control the failure state of buildings so that the buildings can achieve the highest seismic performance during the period, reduce disaster costs and improve safety.
Description
技术领域technical field
本发明涉及一种工程结构基于位移的抗震设计方法。The invention relates to a displacement-based seismic design method for engineering structures.
背景技术Background technique
现在的建筑结构在设计的同时，对建筑的抗震要求为能够承受一定的轻度地震，这就需要建筑结构具有足够的刚度和承载力，但是如果需要低于强震就需要结构有足够的变形能力，且拥有较大的能耗，在地震时，结构的破坏程度与建构的位移相应和变形能力息息相关，因此使用位移结构来抵御地震是一种很可靠地方法，在基于位移的抗震设计基础上，设计者需要更好的控制结构在地震来临过程中的承受行为，防止因为结构变性能力不足而引起的破坏，因此在以后的抗震设计中，我们需要一种能够有效控制建筑破坏状态使建筑物在期周期中达到抗震最高性能的方法，减少灾害费用和提高安全性。While designing the current building structure, the seismic requirements for the building are to be able to withstand a certain mild earthquake, which requires the building structure to have sufficient stiffness and bearing capacity, but if it needs to be lower than the strong earthquake, the structure needs to have enough deformation. In the event of an earthquake, the damage degree of the structure is closely related to the displacement response and deformation capacity of the construction. Therefore, the use of displacement structures to resist earthquakes is a very reliable method. In the foundation of displacement-based seismic design On the other hand, the designer needs to better control the bearing behavior of the structure in the process of earthquake, and prevent the damage caused by insufficient structural degeneration ability. methods to achieve the highest seismic performance of the material during its life cycle, reduce disaster costs and improve safety.
发明内容SUMMARY OF THE INVENTION
本发明针对上述的技术问题采用的技术方案为：一种工程结构基于位移的抗震设计方法，包括以下步骤：The technical solution adopted by the present invention for the above-mentioned technical problems is: a displacement-based seismic design method for engineering structures, comprising the following steps:
(1)确定结构设计所需材料的基本属性，包括材料的强度等级以及设计构成构件的所需数值。(1) Determine the basic properties of the materials required for the structural design, including the strength grades of the materials and the required values of the design components.
(2)根据需求的抗震等级进行计算，确定所需抗震等级目标以及对应的位移角限值。(2) Calculate according to the required seismic grade to determine the required seismic grade target and the corresponding displacement angle limit.
(3)根据目标确定侧移曲线，根据所需抗震等级的设计目标进行计算，假设位移角限值为最极限值，代入计算结构顶点延性系数。(3) Determine the side displacement curve according to the target, calculate according to the design target of the required seismic grade, assume that the displacement angle limit is the most extreme value, and substitute it into the calculation of the ductility coefficient of the vertex of the structure.
(4)根据需求的抗震等级进行等效阻尼比，根据需要的抗震等级计算，高度小于40米时取值为0.04，大于40米且小于180米时取值为0.03，超出范围取值为0.02。(4) Calculate the equivalent damping ratio according to the required seismic grade, and calculate according to the required seismic grade. When the height is less than 40 meters, the value is 0.04, when the height is greater than 40 meters and less than 180 meters, the value is 0.03, and the value beyond the range is 0.02. .
(5)计算结构在地震水平作用下的重力载荷，并通过结构的材料形状等因素进行承载力计算得出结构的抗变形能力，通过抗变形能力分析，假设一个指定值来计算强度需求，如果假设值和实际需求数值产生差异则进行修正计算，假设没有差距或者差距达不到危险数值，则可以实现并进行结构建造。(5) Calculate the gravity load of the structure under the horizontal action of the earthquake, and calculate the bearing capacity through the material shape and other factors of the structure to obtain the anti-deformation capacity of the structure. Through the analysis of the anti-deformation capacity, assuming a specified value to calculate the strength requirement, if If there is a difference between the assumed value and the actual demand value, a correction calculation is made. If there is no gap or the gap cannot reach the dangerous value, the structure can be realized and constructed.
(6)计算结构的基底剪力，采用静力弹塑性分析方法并通过顶点位移数值进行组合分析。(6) Calculate the base shear force of the structure, adopt the static elastic-plastic analysis method and carry out the combined analysis through the vertex displacement numerical value.
(7)再次根据需求抗震等级及实际设计机构进行多自由度体系分析结构，建立能力谱曲线并同时建立需求谱曲线，提高结构的延性水平，并且将极限破坏以拉伸屈服破坏为主，避免因形变而产生的破坏，避免脆性破坏。(7) According to the required seismic level and the actual design organization, the multi-degree-of-freedom system analysis structure is carried out, and the capacity spectrum curve and the demand spectrum curve are established at the same time, so as to improve the ductility level of the structure, and the ultimate failure is mainly tensile yield failure to avoid Destruction due to deformation to avoid brittle failure.
(8)将假设值计算结果汇总，通过数值确定假设抗震能力跟实际需求抗震能力的差距，当复合要求时即可建设构件完成结构。(8) Summarize the calculation results of the assumed value, and determine the gap between the assumed seismic capacity and the actual required seismic capacity by numerical values. When the composite requirements are required, the components can be constructed to complete the structure.
与现有技术相比，本发明的优点和积极效果在于，提出了一种工程结构基于位移的抗震设计方法，通过计算位移角限值可以极好的反应受力和变形性能，通过阻尼比可以推出相应位移角限值的屈服位移从而确定需求，根据结构的结构质量和强度采用假设值可以反应在实际结构中其最容易受影响环节的极限状态从而确定结构是否可行，通过对不同性能水平进行的设计计算可以模拟在遇到不同程度地震时的表现性能，进行性能控制。Compared with the prior art, the advantages and positive effects of the present invention lie in that it proposes a displacement-based seismic design method for engineering structures. The yield displacement of the corresponding displacement angle limit is derived to determine the demand. According to the structural quality and strength of the structure, the assumed value can reflect the limit state of the most susceptible link in the actual structure to determine whether the structure is feasible. The design calculation can simulate the performance and control the performance when encountering earthquakes of different degrees.
具体实施方式Detailed ways
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合实施例对本发明做进一步说明。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用不同于在此描述的其他方式来实施，因此，本发明并不限于下面公开说明书的具体实施例的限制。Many specific details are set forth in the following description to facilitate a full understanding of the present invention, however, the present invention may also be implemented in other ways than those described herein, and therefore, the present invention is not limited to the specific embodiments disclosed in the following description. limit.
一种工程结构基于位移的抗震设计方法，包括以下步骤：A displacement-based seismic design method for engineering structures, comprising the following steps:
(1)确定结构设计所需材料的基本属性，包括材料的强度等级以及设计构成构件的所需数值。(1) Determine the basic properties of the materials required for the structural design, including the strength grades of the materials and the required values of the design components.
(2)根据需求的抗震等级进行计算，确定所需抗震等级目标以及对应的位移角限值。(2) Calculate according to the required seismic grade to determine the required seismic grade target and the corresponding displacement angle limit.
(3)根据目标确定侧移曲线，根据所需抗震等级的设计目标进行计算，假设位移角限值为最极限值，代入计算结构顶点延性系数。(3) Determine the side displacement curve according to the target, calculate according to the design target of the required seismic grade, assume that the displacement angle limit is the most extreme value, and substitute it into the calculation of the ductility coefficient of the vertex of the structure.
(4)根据需求的抗震等级进行等效阻尼比，根据需要的抗震等级计算，高度小于40米时取值为0.04，大于40米且小于180米时取值为0.03，超出范围取值为0.02。(4) Calculate the equivalent damping ratio according to the required seismic grade, and calculate according to the required seismic grade. When the height is less than 40 meters, the value is 0.04, when the height is greater than 40 meters and less than 180 meters, the value is 0.03, and the value beyond the range is 0.02. .
(5)计算结构在地震水平作用下的重力载荷，并通过结构的材料形状等因素进行承载力计算得出结构的抗变形能力，通过抗变形能力分析，假设一个指定值来计算强度需求，如果假设值和实际需求数值产生差异则进行修正计算，假设没有差距或者差距达不到危险数值，则可以实现并进行结构建造。(5) Calculate the gravity load of the structure under the horizontal action of the earthquake, and calculate the bearing capacity through the material shape and other factors of the structure to obtain the anti-deformation capacity of the structure. Through the analysis of the anti-deformation capacity, assuming a specified value to calculate the strength requirement, if If there is a difference between the assumed value and the actual demand value, a correction calculation is made. If there is no gap or the gap cannot reach the dangerous value, the structure can be realized and constructed.
(6)计算结构的基底剪力，采用静力弹塑性分析方法并通过顶点位移数值进行组合分析。(6) Calculate the base shear force of the structure, adopt the static elastic-plastic analysis method and carry out the combined analysis through the vertex displacement numerical value.
(7)再次根据需求抗震等级及实际设计机构进行多自由度体系分析结构，建立能力谱曲线并同时建立需求谱曲线，提高结构的延性水平，并且将极限破坏以拉伸屈服破坏为主，避免因形变而产生的破坏，避免脆性破坏。(7) According to the required seismic level and the actual design organization, the multi-degree-of-freedom system analysis structure is carried out, and the capacity spectrum curve and the demand spectrum curve are established at the same time, so as to improve the ductility level of the structure, and the ultimate failure is mainly tensile yield failure to avoid Destruction due to deformation to avoid brittle failure.
(8)将假设值计算结果汇总，通过数值确定假设抗震能力跟实际需求抗震能力的差距，当复合要求时即可建设构件完成结构。(8) Summarize the calculation results of the assumed value, and determine the gap between the assumed seismic capacity and the actual required seismic capacity by numerical values. When the composite requirements are required, the components can be constructed to complete the structure.
以上所述，仅是本发明的较佳实施例而已，并非是对本发明作其它形式的限制，任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例应用于其它领域，但是凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型，仍属于本发明技术方案的保护范围。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. The embodiments are applied to other fields, but any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solutions of the present invention without departing from the content of the technical solutions of the present invention.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111931313A (en) * | 2020-10-09 | 2020-11-13 | 南京长江都市建筑设计股份有限公司 | Method, device, equipment and medium for processing overrun structure |
| CN114266096A (en) * | 2021-12-24 | 2022-04-01 | 哈尔滨工业大学（深圳） | Standard earthquake action determination method based on structural nonlinear overall process |
| CN116310791A (en) * | 2023-01-19 | 2023-06-23 | 中国地震台网中心 | Rapid judgment method and electronic equipment for extremely disaster area based on building earthquake damage detection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111931313A (en) * | 2020-10-09 | 2020-11-13 | 南京长江都市建筑设计股份有限公司 | Method, device, equipment and medium for processing overrun structure |
| CN114266096A (en) * | 2021-12-24 | 2022-04-01 | 哈尔滨工业大学（深圳） | Standard earthquake action determination method based on structural nonlinear overall process |
| CN116310791A (en) * | 2023-01-19 | 2023-06-23 | 中国地震台网中心 | Rapid judgment method and electronic equipment for extremely disaster area based on building earthquake damage detection |
| CN116310791B (en) * | 2023-01-19 | 2023-09-05 | 中国地震台网中心 | Rapid judgment method and electronic equipment for extremely disaster area based on building earthquake damage detection |
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Application publication date: 20190719 |