CN202157411U - Double lateral force resisting structure of fabricated buckling-restrained brace steel frame - Google Patents
Double lateral force resisting structure of fabricated buckling-restrained brace steel frame Download PDFInfo
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Abstract
本实用新型公开一种装配式屈曲约束支撑钢框架双重抗侧力结构，至少包括一个框架单元，每个框架单元由两根框架柱和一根框架梁围成开口矩形框架，框架梁的两端分别与两根框架柱的上端半刚性连接，还包括至少一根屈曲约束支撑，所述屈曲约束支撑倾斜设置，并且屈曲约束支撑的两端固定连接在所述框架单元内。本实用新型的装配式屈曲约束支撑钢框架双重抗侧力结构，屈曲约束支撑在受拉和受压时都能屈服，耗能性能好；梁柱连接设为半刚性连接，在施工现场只需要进行螺栓连接，而且支撑与结构连接也为螺栓连接，施工方便，提升施工速度。
The utility model discloses an assembled buckling-constrained supporting steel frame double-resistant lateral force structure, which comprises at least one frame unit, each frame unit is surrounded by two frame columns and a frame beam to form an open rectangular frame, and the two ends of the frame beam The upper ends of the two frame columns are semi-rigidly connected respectively, and at least one buckling restraint support is included, the buckling restraint support is arranged obliquely, and the two ends of the buckling restraint support are fixedly connected in the frame unit. The utility model has an assembled buckling-constrained support steel frame double-resistant lateral force structure, and the buckling-constrained support can yield under tension and compression, and has good energy consumption performance; the beam-column connection is set as a semi-rigid connection, and only Bolt connection is carried out, and the connection between the support and the structure is also bolt connection, which is convenient for construction and improves the construction speed.
Description
技术领域 technical field
本实用新型属于多层和高层建筑技术领域，具体涉及一种装配式屈曲约束支撑钢框架双重抗侧力结构。The utility model belongs to the technical field of multi-storey and high-rise buildings, in particular to an assembled buckling-constrained support steel frame double-resistance lateral force structure.
背景技术 Background technique
节点作为框架中连接传力的枢纽，对整个结构性能的充分发挥具有十分重要的意义。在1994年美国的Northridge地震和1995年日本的神户地震中，有许多焊接刚性节点因延性较差发生了脆性破坏，这一现象引起有关组织和专家的注意和重视。我国位于世界两大地震构造系的交汇部位，地处地震多发地带，地震频繁而强烈。在传统的分析方法中，为了便于结构分析，计算时往往把梁柱节点简化成刚性节点或铰接节点。但实际结构中，纯粹的刚性和铰接节点是不存在的，其实际性能往往是介于这两者之间的半刚性节点，即既能传递弯矩，又具有一定的转动能力。传统的刚接纯钢框架单元在强震作用后梁柱通常会产生塑性变形，这将使震后修复困难。Nodes, as the hubs of connection and force transmission in the frame, are of great significance to the full play of the performance of the entire structure. In the Northridge earthquake in the United States in 1994 and the Kobe earthquake in Japan in 1995, many welded rigid joints suffered brittle failure due to poor ductility. This phenomenon has attracted the attention and attention of relevant organizations and experts. my country is located at the intersection of the world's two major seismic tectonic systems, and is located in an earthquake-prone zone with frequent and strong earthquakes. In the traditional analysis method, in order to facilitate the structural analysis, the beam-column joints are often simplified into rigid joints or hinged joints during calculation. But in the actual structure, purely rigid and hinged nodes do not exist, and its actual performance is often a semi-rigid node between the two, that is, it can not only transmit bending moment, but also have a certain rotational ability. The traditional rigid-connected pure steel frame units usually produce plastic deformation after strong earthquakes, which will make post-earthquake repair difficult.
在钢框架单元中，支撑是一种有效的抗侧力构件，可使钢框架具备更高的抗侧刚度，传统的带支撑框架有中心支撑框架和偏心支撑框架。中震和强震时，中心支撑框架中的普通支撑会受压屈曲和受拉屈服，而屈曲会使受压承载力降低，从而限制了支撑作为抗侧力构件的耗能能力。偏心支撑框架通过偏心梁段的屈服，限制支撑的屈曲，可使结构具有较好的耗能性能，但是由于偏心梁段屈服，使主结构损伤，地震后结构修复较为困难。In steel frame units, bracing is an effective anti-lateral force member, which can make the steel frame have higher anti-lateral stiffness. The traditional braced frame has central braced frame and eccentric braced frame. During moderate and strong earthquakes, the ordinary braces in the centrally braced frame will buckle in compression and yield in tension, and the buckling will reduce the compressive bearing capacity, thereby limiting the energy dissipation capacity of the braces as lateral force-resistant members. The eccentrically braced frame restricts the buckling of the brace through the yielding of the eccentric beam section, which can make the structure have better energy dissipation performance. However, due to the yielding of the eccentric beam section, the main structure is damaged, and the structural repair after the earthquake is more difficult.
现有的刚接钢结构体系在施工时需要在现场施焊，有施工速度慢、增大施工难度，焊接质量难以保证的缺点。The existing rigid-joined steel structure system needs to be welded on site during construction, which has the disadvantages of slow construction speed, increased construction difficulty, and difficulty in guaranteeing welding quality.
实用新型内容 Utility model content
本实用新型所要解决的问题是提供一种装配式屈曲约束支撑钢框架双重抗侧力结构，克服现有技术中存在的上述问题。The problem to be solved by the utility model is to provide an assembled buckling-constrained support steel frame double-resistant lateral force structure, which overcomes the above-mentioned problems existing in the prior art.
本实用新型装配式屈曲约束支撑钢框架双重抗侧力结构，至少包括一个框架单元，每个框架单元由两根框架柱和一根框架梁围成开口矩形框架，框架梁的两端分别与两根框架柱的上端半刚性连接，还包括至少一根屈曲约束支撑，所述屈曲约束支撑倾斜设置，并且屈曲约束支撑的两端固定连接在所述框架单元内。The utility model has an assembled buckling-constrained supporting steel frame double-resistant lateral force structure, which includes at least one frame unit, and each frame unit is surrounded by two frame columns and a frame beam to form an open rectangular frame, and the two ends of the frame beam are respectively connected with two The semi-rigid connection of the upper end of the frame column further includes at least one buckling restraint support, the buckling restraint support is arranged obliquely, and the two ends of the buckling restraint support are fixedly connected in the frame unit.
本实用新型多个所述框架单元上下固定连接，并且上一框架单元的框架柱下端与下一框架单元的框架柱上端对应刚性连接。In the utility model, multiple frame units are fixedly connected up and down, and the lower end of the frame column of the previous frame unit is rigidly connected with the upper end of the frame column of the next frame unit.
本实用新型每个框架单元内设置一根屈曲约束支撑，屈曲约束支撑的一端固定连接在一根框架柱的上端，屈曲约束支撑的另一端固定连接在另一根框架柱的下端。Each frame unit of the utility model is provided with a buckling restraint support, one end of the buckling restraint support is fixedly connected to the upper end of a frame column, and the other end of the buckling restraint support is fixedly connected to the lower end of another frame column.
本实用新型每个框架单元内设有两根屈曲约束支撑，两根屈曲约束支撑的一端固定在一根框架梁的中部，两根屈曲约束支撑的另一端分别固定在该框架单元两根框架柱的端部，使两根屈曲约束支撑成V形或倒V形排列。Each frame unit of the utility model is provided with two buckling-constrained supports, one end of the two buckling-constrained supports is fixed in the middle of a frame beam, and the other ends of the two buckling-constrained supports are respectively fixed on two frame columns of the frame unit At the end of , the two buckling-constrained supports are arranged in a V-shape or an inverted-V shape.
本实用新型当所述两根屈曲约束支撑成V形排列时，两根屈曲约束支撑的一端固定在与本框架单元相邻的下面一个框架单元的框架梁中部，两根屈曲约束支撑的另一端分别固定在本框架单元的两根框架柱的上端。In the utility model, when the two buckling-constrained supports are arranged in a V shape, one end of the two buckling-constrained supports is fixed in the middle of the frame beam of the lower frame unit adjacent to this frame unit, and the other end of the two buckling-constrained supports respectively fixed on the upper ends of the two frame columns of the frame unit.
本实用新型当所述两根屈曲约束支撑成倒V形排列时，两根屈曲约束支撑的一端固定在本框架单元的框架梁中部，两根屈曲约束支撑的另一端分别固定在本框架单元的两根框架柱的下端。In the utility model, when the two buckling-constrained supports are arranged in an inverted V shape, one end of the two buckling-constrained supports is fixed at the middle of the frame beam of the frame unit, and the other ends of the two buckling-constrained supports are respectively fixed at the center of the frame unit. The lower ends of the two framing columns.
本实用新型半刚性连接为在所述框架梁与框架柱间设有矮短板，框架梁和框架柱分别与矮短板刚性连接。The semi-rigid connection of the utility model is that a short board is provided between the frame beam and the frame column, and the frame beam and the frame column are respectively rigidly connected with the short board.
通过以上技术方案，本实用新型将结构塑性变形全部引导到支撑和半刚性连接上，使梁柱在强烈地震作用下能保持在弹性状态，继续保持承载能力，保证结构不倒塌。与刚接相比，半刚性连接耗能性能好，且真实反映结构实际性态，可以真正意义上实现钢结构的优化设计；屈曲约束支撑在受拉和受压两种受力状态下都能屈服而不屈曲，耗能性能优越。因而装配式屈曲约束支撑钢框架双重抗侧力结构体系耗能性能好，具有两道抗震设防线，在抗震设防区的多高层建筑中使用性能优越，且可以实现优化设计，节省用钢量。梁柱连接设为半刚性连接，在施工现场只需要进行螺栓连接，而且支撑与结构连接也为螺栓连接，施工方便，提升施工速度。Through the above technical solutions, the utility model guides all the plastic deformation of the structure to the supports and semi-rigid connections, so that the beams and columns can remain in an elastic state under strong earthquakes, continue to maintain the bearing capacity, and ensure that the structure does not collapse. Compared with the rigid connection, the semi-rigid connection has better energy dissipation performance and truly reflects the actual behavior of the structure, which can truly realize the optimal design of the steel structure; Yielding but not buckling, superior energy dissipation performance. Therefore, the prefabricated buckling-constrained braced steel frame double lateral force-resistant structural system has good energy consumption performance and has two seismic fortification lines. It has superior performance in multi-story buildings in seismic fortification areas, and can realize optimized design and save steel consumption. The beam-column connection is set as a semi-rigid connection. Only bolt connection is required at the construction site, and the connection between the support and the structure is also bolt connection, which facilitates construction and improves construction speed.
附图说明 Description of drawings
图1为上下层屈曲约束支撑都为单斜杆排列的装配式屈曲约束支撑钢框架双重抗侧力结构体系立面示意图。Fig. 1 is a schematic diagram of the elevation of the fabricated buckling-restrained braced steel frame dual lateral force-resisting structural system, in which the buckling-restrained braces of the upper and lower floors are arranged with single-slope bars.
图2为上下层屈曲约束支撑都为倒立V型依次排列的装配式屈曲约束支撑钢框架双重抗侧力结构体系立面示意图。Fig. 2 is a schematic diagram of the elevation of the fabricated buckling-restrained braced steel frame dual lateral force-resisting structural system in which the buckling-restrained braces of the upper and lower floors are arranged in an inverted V shape.
图3为上下层屈曲约束支撑V型与倒立V型交叉排列的装配式屈曲约束支撑钢框架双重抗侧力结构体系立面示意图。Fig. 3 is a schematic diagram of the elevation of the assembled buckling-restrained braced steel frame dual lateral force-resisting structural system with buckling-restrained bracing V-shape and inverted V-shape cross-arranged on the upper and lower floors.
图4为装配式屈曲约束支撑钢框架双重抗侧力结构体系框架柱、框架梁和屈曲约束支撑连接节点示意图。Fig. 4 is a schematic diagram of the joints of frame columns, frame beams and buckling-restrained braces of the assembled buckling-restrained braced steel frame dual lateral force-resistant structural system.
具体实施方式 Detailed ways
结合以上附图对本实用新型做进一步具体描述：In conjunction with above accompanying drawing, the utility model is described in further detail:
本实用新型装配式屈曲约束支撑钢框架双重抗侧力结构，至少包括一个由框架柱1-1，1-2，1-3，1-4和框架梁2-1，2-2，2-3，2-4围成的框架单元，还包括位于框架单元内的至少一个屈曲约束支撑3-1到3-8，框架柱和框架梁半刚性连接(见图4)，半刚性连接具体指在框架柱与框架梁间设置矮短板，框架梁与框架柱分别矮短板焊接或螺栓连接，屈曲约束支撑两端分别与框架单元的对角点固定相连(见图1)，或者屈曲约束支撑成V型或倒立的V型与框架单元固定相连(见图2及图3)。多个框架单元上下依次固定，并相邻两个框架柱的端部刚性连接。The utility model's assembled buckling-constrained support steel frame double anti-lateral force structure includes at least one frame column 1-1, 1-2, 1-3, 1-4 and frame beam 2-1, 2-2, 2- 3. The frame unit surrounded by 2-4 also includes at least one buckling restraint support 3-1 to 3-8 located in the frame unit, and the frame column and frame beam are semi-rigidly connected (see Figure 4). The semi-rigid connection specifically refers to Set short short plates between frame columns and frame beams, frame beams and frame columns are respectively connected by short plate welding or bolts, and the two ends of buckling-constrained supports are fixedly connected with the diagonal points of frame elements (see Figure 1), or buckling-constrained The V-shape supported or the inverted V-shape is fixedly connected with the frame unit (see Fig. 2 and Fig. 3). A plurality of frame units are fixed up and down in sequence, and are rigidly connected at the ends of two adjacent frame columns.
如图1所示本实用新型的第一实施例，屈曲约束支撑的两端通过螺栓固定在不同框架柱和框架梁的交点上。第一框架柱1-1上端和第二框架柱1-2下端刚连接成为一体，第三框架柱1-3上端和第四框架柱1-4下端刚连接成为一体；第一框架梁2-1一端通过半刚性连接第一框架柱1-1上端，第一框架梁2-1另一端通过半刚性连接第三框架柱1-3上端，第二框架梁2-2一端通过半刚性连接第二框架柱1-2上端，第二框架梁2-2另一端通过半刚性连接第四框架柱1-4上端；第一屈曲约束支撑3-1一端连接在第一框架柱1-1与第一框架梁2-1的交点上，第一屈曲约束支撑3-1另一端连接在第三框架柱1-3下端，第二屈曲约束支撑3-2一端连接在第二框架柱1-2与第二框架梁2-2的交点上，第二屈曲约束支撑3-2另一端连接在第三框架柱1-3与第一框架梁2-1的交点，即使屈曲约束支撑呈单斜杆排列。As shown in Fig. 1 in the first embodiment of the present invention, the two ends of the buckling constrained support are fixed on the intersections of different frame columns and frame beams by bolts. The upper end of the first frame column 1-1 is just connected to the lower end of the second frame column 1-2, and the upper end of the third frame column 1-3 is just connected to the lower end of the fourth frame column 1-4; the first frame beam 2- 1 One end is semi-rigidly connected to the upper end of the first frame column 1-1, the other end of the first frame beam 2-1 is semi-rigidly connected to the upper end of the third frame column 1-3, and one end of the second frame beam 2-2 is semi-rigidly connected to the first The upper end of the second frame column 1-2, the other end of the second frame beam 2-2 is semi-rigidly connected to the upper end of the fourth frame column 1-4; one end of the first buckling restraint support 3-1 is connected between the first frame column 1-1 and the second frame beam At the intersection point of a frame beam 2-1, the other end of the first buckling restraint support 3-1 is connected to the lower end of the third frame column 1-3, and one end of the second buckling restraint support 3-2 is connected to the second frame column 1-2 and At the intersection of the second frame beam 2-2, the other end of the second buckling restraint support 3-2 is connected to the intersection point of the third frame column 1-3 and the first frame beam 2-1, even if the buckling restraint support is arranged in a single diagonal bar .
如图2及图3所示，屈曲约束支撑为两根成V型或倒立的V型固定在框架单元内，每根屈曲约束支撑的一端通过螺栓固定在所述框架梁和同根框架柱的两个交点上，并两根屈曲约束支撑的另一端一起通过螺栓固定在另一根框架梁的中间处。多个框架单元内的屈曲约束支撑为倒立V型依次排列(见图2)，或者成V型与倒立的V型交叉排列(见图3)As shown in Figure 2 and Figure 3, two buckling-constrained braces are fixed in a V-shaped or inverted V-shaped frame unit, and one end of each buckling-constrained brace is fixed to the frame beam and the two ends of the same frame column by bolts. At the intersection point, the other ends of the two buckling-restrained supports are bolted to the middle of the other frame beam. The buckling-constrained supports in multiple frame units are arranged sequentially in an inverted V shape (see Figure 2), or in a V-shape and an inverted V-shape cross arrangement (see Figure 3)
如图2所示本实用新型的第二实施例，多个框架单元内的屈曲约束支撑为倒立V型依次排列：第三屈曲约束支撑3-3一端连接在第一框架柱1-1下端，第三屈曲约束支撑3-3另一端连接在第一框架梁2-1下翼缘中点，第四屈曲约束支撑3-4一端在连接第三框架柱1-3下端，第四屈曲约束支撑3-4另一端连接在第三屈曲约束支撑3-3与第一框架梁2-1的交点上，即使屈曲约束支撑在第一层呈倒立V型排列；第五屈曲约束支撑3-5一端连接在第一框架柱1-1与第一框架梁2-1的交点上，第五屈曲约束支撑3-5另一端连接在第二框架梁2-2下翼缘中点；第六屈曲约束支撑3-6一端连接在第三框架柱1-3与第一框架梁2-1的交点上，第六屈曲约束支撑3-6另一端连接在第五屈曲约束支撑3-5与第二框架梁2-2的交点上，即使屈曲约束支撑在第二层倒立V型排列。As shown in Figure 2 in the second embodiment of the present utility model, the buckling restraint supports in a plurality of frame units are arranged in an inverted V shape: one end of the third buckling restraint support 3-3 is connected to the lower end of the first frame column 1-1, The other end of the third buckling-constrained support 3-3 is connected to the midpoint of the lower flange of the first frame beam 2-1, one end of the fourth buckling-constrained support 3-4 is connected to the lower end of the third frame column 1-3, and the fourth buckling-constrained support The other end of 3-4 is connected to the intersection point of the third buckling-constrained support 3-3 and the first frame beam 2-1, even if the buckling-constrained support is arranged in an inverted V shape on the first floor; one end of the fifth buckling-constrained support 3-5 Connected to the intersection of the first frame column 1-1 and the first frame beam 2-1, the other end of the fifth buckling restraint support 3-5 is connected to the midpoint of the lower flange of the second frame beam 2-2; the sixth buckling restraint One end of the support 3-6 is connected to the intersection of the third frame column 1-3 and the first frame beam 2-1, and the other end of the sixth buckling-constrained support 3-6 is connected to the fifth buckling-constrained support 3-5 and the second frame At the intersection of beams 2-2, even if the buckling restraints are braced in an inverted V-arrangement on the second floor.
如图3所示本实用新型的第三实施例，多个框架单元内的屈曲约束支撑成V型与倒立的V型交叉排列：第三屈曲约束支撑3-3一端连接在第一框架柱1-1下端，第三屈曲约束支撑3-3另一端连接在第一框架梁2-1下翼缘中点，第四屈曲约束支撑3-4一端在连接第三框架柱1-3下端，第四屈曲约束支撑3-4另一端连接在第三屈曲约束支撑3-3与第一框架梁2-1的交点上，即使屈曲约束支撑在第一层呈倒立V型排列；第七屈曲约束支撑3-7一端连接第一框架梁2-1上翼缘中点，第七屈曲约束支撑3-7另一端连接第二框架柱1-2与第二框架梁2-2的交点，第八屈曲约束支撑3-8一端连接第七屈曲约束支撑3-7与第一框架梁2-1的交点，第八屈曲约束支撑3-8另一端连接第四框架柱1-4与第二框架梁2-2的交点，即使屈曲约束支撑在第二层呈V型排列。As shown in Figure 3, in the third embodiment of the present invention, the buckling restraint supports in a plurality of frame units are arranged in a V-shape and an inverted V-shape cross arrangement: one end of the third buckling restraint support 3-3 is connected to the first frame column 1 -1 lower end, the other end of the third buckling restraint support 3-3 is connected to the midpoint of the lower flange of the first frame beam 2-1, one end of the fourth buckling restraint support 3-4 is connected to the lower end of the third frame column 1-3, the second The other end of the four-buckling-constrained support 3-4 is connected to the intersection of the third buckling-constrained support 3-3 and the first frame beam 2-1, even if the buckling-constrained support is arranged in an inverted V shape on the first floor; the seventh buckling-constrained support 3-7 One end is connected to the middle point of the upper flange of the first frame beam 2-1, the seventh buckling restraint brace 3-7 is connected to the intersection point of the second frame column 1-2 and the second frame beam 2-2, the eighth buckling One end of the restraint support 3-8 is connected to the intersection of the seventh buckling restraint support 3-7 and the first frame beam 2-1, and the other end of the eighth buckling restraint support 3-8 is connected to the fourth frame column 1-4 and the second frame beam 2 An intersection of -2, even if the buckling-constrained braces are arranged in a V-shape on the second floor.
本实用新型提供了一种适用于多层与高层建筑的结构体系，在初步设计阶段由竖向荷载确定框架梁和框架柱的截面，由水平荷载确定屈曲约束支撑截面。在施工图设计阶段通过有限元分析进行优化设计。施工中框架梁、框架柱连接采用端板型连接的半刚性连接形式。框架柱、框架梁上与支撑的连接节点在钢结构加工厂中加工，梁柱在施工现场安装好以后，屈曲约束支撑通过螺栓连接与框架梁、框架柱连接。The utility model provides a structural system suitable for multi-storey and high-rise buildings. In the preliminary design stage, the cross-sections of frame beams and frame columns are determined by vertical loads, and the buckling-constrained support cross-sections are determined by horizontal loads. In the construction drawing design stage, the optimal design is carried out through finite element analysis. The semi-rigid connection form of end plate connection is adopted for the connection of frame beam and frame column during construction. The connection nodes between the frame columns and frame beams and supports are processed in the steel structure processing plant. After the beams and columns are installed on the construction site, the buckling restraint supports are connected to the frame beams and frame columns through bolt connections.
以一所六层教学楼建筑为例说明其使用过程。该建筑总宽度16m，总长度48m，层高3.6m。中间跨度4m，边跨6m，共六跨。场地类别"类，基本设防烈度7度。基本风压0.55kN/m2，位于城市市区。结构方案采用装配式屈曲约束支撑钢框架双重抗侧力结构体系，在中间跨设置屈曲约束支撑，所有梁柱连接都为端板型半刚性连接方式。根据竖向荷载和跨度确定梁高，每层框架梁截面为H300×150×6.5×9；根据轴压比选用框架柱截面，第一层、第二层和第三层框架柱中柱截面为H440×300×10×18，边柱截面为H390×300×10×16；第四层、第五层和第六层框架柱中柱截面为H320×200×10×12，边柱截面为H280×175×8×10。采用单斜杆的支撑布置形式，支撑位于中跨。根据几何形状确定支撑长度，根据水平荷载确定支撑芯板截面，第一层、第二层和第三层支撑截面为90×12mm，第四层、第五层和第六层支撑截面为70×8mm。通过设计满足设计目标。Take a six-story teaching building as an example to illustrate its use process. The total width of the building is 16m, the total length is 48m, and the storey height is 3.6m. The middle span is 4m, and the side span is 6m, a total of six spans. The site category is "Class", the basic fortification intensity is 7 degrees. The basic wind pressure is 0.55kN/m2, and it is located in the urban area. Beam-column connections are end-plate semi-rigid connections. The beam height is determined according to the vertical load and span, and the frame beam section of each floor is H300×150×6.5×9; The cross-section of the middle column of the frame column on the second and third floors is H440×300×10×18, and the cross-section of the side column is H390×300×10×16; the cross-section of the middle column of the frame column on the fourth, fifth and sixth floors is H320×200×10×12, the side column section is H280×175×8×10. The support arrangement of single inclined rod is adopted, and the support is located in the middle span. The support length is determined according to the geometric shape, and the support core plate section is determined according to the horizontal load. The support section of the first, second and third floors is 90×12mm, and the support section of the fourth, fifth and sixth floors is 70×8mm. The design goal is met through design.
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