CN102401765B - Lateral restraint device for loading test of steel structure compression members - Google Patents

Lateral restraint device for loading test of steel structure compression members Download PDF

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CN102401765B
CN102401765B CN 201110378921 CN201110378921A CN102401765B CN 102401765 B CN102401765 B CN 102401765B CN 201110378921 CN201110378921 CN 201110378921 CN 201110378921 A CN201110378921 A CN 201110378921A CN 102401765 B CN102401765 B CN 102401765B
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CN102401765A (en
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施刚
班慧勇
石永久
王元清
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Tsinghua University
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Abstract

本发明属于结构工程钢结构技术领域,特别涉及一种钢结构受压构件加载试验侧向约束装置。前后2个支撑横梁内侧翼缘相对并互相平行,左右2个自平衡横梁内侧翼缘相对并分别与2个支撑横梁的左端和右端螺栓连接构成矩形的自平衡反力架,2块试件夹板在支撑横梁之间正面相对并互相平行分别用4个夹板螺杆和配套螺母固定在2个支撑横梁内侧翼缘中部,通过调节配套螺母调整2块试件夹板的间距,丝杠卡基座固接在支撑横梁外侧翼缘上,丝杠卡与丝杠卡基座固接,丝杠卡卡在长柱压力试验机的丝杠上,自平衡反力架水平置于丝杠之间,2块试件夹板夹住试件的侧面。本发明实现了受压试件失稳平面外的有效侧向支撑,适用于受压构件的整体稳定性能试验研究。

Figure 201110378921

The invention belongs to the technical field of structural engineering steel structures, and in particular relates to a lateral restraint device for loading tests of compression members of steel structures. The inner flanges of the front and rear two supporting beams are opposite and parallel to each other, the inner flanges of the left and right self-balancing beams are opposite and respectively connected with the left and right ends of the two supporting beams with bolts to form a rectangular self-balancing reaction frame, and two specimen splints The fronts of the supporting beams face each other and are parallel to each other, respectively fix them in the middle of the inner flanges of the two supporting beams with 4 splint screws and matching nuts, and adjust the distance between the 2 test piece splints by adjusting the matching nuts, and the screw clamp base is fixed. On the outer flange of the supporting beam, the lead screw clamp is fixedly connected to the base of the lead screw clamp, the lead screw clamp is clamped on the lead screw of the long column pressure testing machine, and the self-balancing reaction force frame is horizontally placed between the lead screws, 2 pieces The specimen clamp clamps the sides of the specimen. The invention realizes the effective lateral support outside the instability plane of the pressure test piece, and is suitable for the overall stability performance test research of the pressure component.

Figure 201110378921

Description

钢结构受压构件加载试验侧向约束装置Lateral restraint device for loading test of steel structure compression members

技术领域 technical field

本发明属于结构工程钢结构技术领域,特别涉及一种钢结构受压构件加载试验侧向约束装置。The invention belongs to the technical field of structural engineering steel structures, and in particular relates to a lateral restraint device for loading tests of compression members of steel structures.

背景技术 Background technique

钢结构受压构件的整体稳定性能是钢结构领域最重要的研究课题之一,通常采用长柱压力试验机进行试验研究。在没有侧向支撑的情况下,受压钢柱通常绕截面弱轴方向失稳。为了研究钢柱绕强轴的整体稳定性能,必须提供必要的侧向支撑条件,减小钢柱绕弱轴的计算长度才能保证其发生绕强轴的失稳。然而长柱压力试验机并没有提供侧向支撑的装置,试验中往往需要在其周围布置大型的支撑反力架,但反力架安装困难、支撑数量有限且需要较大的场地,条件有限的实验室甚至无法布置大型反力架。如何设计能够有效提供侧向支撑、同时又具有安装方便、尺寸可调、装配简单、体型较小等特点的侧向支撑装置,是科学研究及工程实践中亟待解决的问题。The overall stability of steel structure compression members is one of the most important research topics in the field of steel structure, and long-column compression testing machines are usually used for experimental research. In the absence of lateral bracing, steel columns in compression usually lose stability about the weak axis of the section. In order to study the overall stability of the steel column around the strong axis, the necessary lateral support conditions must be provided, and the calculated length of the steel column around the weak axis can be reduced to ensure that the instability around the strong axis occurs. However, the long-column compression testing machine does not provide a lateral support device, and it is often necessary to arrange a large-scale support and reaction frame around it during the test, but the installation of the reaction frame is difficult, the number of supports is limited, and a large site is required. The laboratory cannot even arrange a large reaction force frame. How to design a lateral support device that can effectively provide lateral support and at the same time have the characteristics of convenient installation, adjustable size, simple assembly, and small size is an urgent problem to be solved in scientific research and engineering practice.

发明内容 Contents of the invention

本发明的目的在于解决背景技术所述的长柱压力试验机进行钢结构受压构件加载试验时的侧向支撑装置问题,提供一种钢结构受压构件加载试验侧向约束装置,其特征在于,钢结构受压构件加载试验侧向约束装置为可拆卸结构,由丝杠卡1、支撑横梁2,自平衡横梁3、丝杠卡基座4、试件夹板5和夹板螺杆6构成,支撑横梁2和自平衡横梁3均为H型工字钢结构,支撑横梁2内侧翼缘中部有4个孔,前后2个支撑横梁2内侧翼缘相对并互相平行,左右2个自平衡横梁3内侧翼缘相对并分别与前后2个支撑横梁2的左端和右端螺栓连接构成矩形的自平衡反力架,4个夹板螺杆6垂直固接在试件夹板5背面的四角处,2块试件夹板5在2个支撑横梁2之间正面相对互相平行并分别用4个夹板螺杆6和每个夹板螺杆6的2个配套螺母通过支撑横梁2内侧翼缘中部的4个孔固定在2个支撑横梁2内侧翼缘中部,通过调节配套螺母调整2块试件夹板5的间距,按自平衡反力架水平放置并左右对称置于长柱压力试验机的4个丝杠9之间的位置,每个支撑横梁2上,2个丝杠卡基座4分别在2个丝杠9的对应位置固接在支撑横梁2外侧翼缘上,丝杠卡1通过固定卡座103与丝杠卡基座4固接;The purpose of the present invention is to solve the problem of the lateral support device when the long column pressure testing machine described in the background technology performs the loading test of the steel structure compression member, and to provide a lateral restraint device for the loading test of the steel structure compression member, which is characterized in that , the lateral restraint device of the steel structure compression member loading test is a detachable structure, which is composed of screw clamp 1, supporting beam 2, self-balancing beam 3, screw clamp base 4, specimen splint 5 and splint screw 6, supporting The beam 2 and the self-balancing beam 3 are both H-shaped steel structures. There are 4 holes in the middle of the inner flange of the supporting beam 2. The two inner flanges of the supporting beam 2 at the front and rear are opposite and parallel to each other. The side flanges are opposite to each other and respectively bolted to the left and right ends of the two front and rear support beams 2 to form a rectangular self-balancing reaction frame. Four splint screws 6 are vertically fixed at the four corners of the back of the specimen splint 5. Two specimen splints 5. Between the two supporting beams 2, the front faces are relatively parallel to each other, and the four splint screws 6 and the two supporting nuts of each splint screw 6 are fixed to the two supporting beams through the four holes in the middle of the inner flange of the supporting beam 2. 2. In the middle of the inner flange, adjust the distance between the two test piece splints 5 by adjusting the supporting nuts, and place them horizontally and symmetrically between the four lead screws 9 of the long column pressure testing machine according to the self-balancing reaction frame. On a support beam 2, two lead screw card bases 4 are respectively fixed on the outer flanges of the support beam 2 at the corresponding positions of the two lead screws 9, and the lead screw card 1 connects with the lead screw card base through the fixed deck 103. 4 fixed connection;

所述支撑横梁2中,腹板两侧固接横向加劲肋7,支撑横梁2两端设置封头盖板用于和自平衡横梁3螺栓连接;In the supporting beam 2, the transverse stiffeners 7 are fixed on both sides of the web, and the two ends of the supporting beam 2 are provided with cover plates for bolt connection with the self-balancing beam 3;

所述自平衡横梁3中,腹板两侧固接横向加劲肋7;In the self-balancing beam 3, transverse stiffeners 7 are fixed on both sides of the web;

所述丝杠卡1由活动卡101、固定卡102和固定卡座103组成,活动卡101和固定卡102分别为与长柱压力试验机的丝杠9直径相同的半圆环,固定卡102外侧和固定卡座103的圆弧面固接,固定卡座103的两侧面上焊接加劲肋,活动卡101和固定卡102为螺栓连接;Described lead screw card 1 is made up of movable card 101, fixed card 102 and fixed card seat 103, and movable card 101 and fixed card 102 are respectively the same semicircular ring with the leading screw 9 diameters of long column pressure testing machine, and fixed card 102 The outer side is affixed to the arc surface of the fixed card holder 103, the two sides of the fixed card holder 103 are welded with stiffeners, and the movable card 101 and the fixed card 102 are connected by bolts;

所述试件夹板5的正面设置一层聚四氟乙烯板,以减小试件夹板5与试件8间的摩擦力。A polytetrafluoroethylene plate is arranged on the front side of the test piece splint 5 to reduce the friction between the test piece splint 5 and the test piece 8 .

本发明的有益效果为:The beneficial effects of the present invention are:

(1)结构形式简单,易于加工,成本低廉;(1) The structure is simple, easy to process and low in cost;

(2)试件夹板尺寸可调,适用于不同截面尺寸的受压钢柱;(2) The size of the specimen splint is adjustable, suitable for compression steel columns of different cross-sectional sizes;

(3)在长柱压力试验机的丝杠上的固定高度可调,适用于不同高度的受压钢柱,并可同时使用多套钢结构受压构件加载试验侧向约束装置;(3) The fixed height on the lead screw of the long column compression testing machine is adjustable, suitable for compression steel columns of different heights, and multiple sets of steel structure compression members can be used to load test lateral restraint devices at the same time;

(4)装置自平衡,可承受较大的侧向水平荷载,同时可有效避免其传至试验机丝杠;(4) The device is self-balancing and can withstand large lateral horizontal loads, while effectively preventing it from being transmitted to the screw of the testing machine;

(5)支撑板面的聚四氟乙烯板可减小装置与构件间的摩擦力。(5) The polytetrafluoroethylene plate on the support plate can reduce the friction between the device and the components.

附图说明 Description of drawings

图1为钢结构受压构件加载试验侧向约束装置实施例的结构俯视示意图;Fig. 1 is the schematic plan view of the structure of the embodiment of the lateral restraint device of the steel structure compression member loading test;

图2为图1沿A-A方向的结构剖视图;Fig. 2 is a structural sectional view along the A-A direction of Fig. 1;

图3为图1沿B-B方向的结构剖视图;Fig. 3 is a structural sectional view along the B-B direction of Fig. 1;

图4为丝杠卡结构示意图。Fig. 4 is a schematic structural diagram of the lead screw card.

图中,1--丝杠卡,101--活动卡,102--固定卡,103--固定卡座,2--支撑横梁,7--横向加劲肋,3--自平衡横梁,4--丝杠卡基座,5--试件夹板,6--夹板螺杆,7--横向加劲肋,8--试件,9--丝杠。In the figure, 1--lead screw card, 101--movable card, 102--fixed card, 103--fixed card seat, 2--supporting beam, 7--transverse stiffener, 3--self-balancing beam, 4 -- screw card base, 5 -- specimen splint, 6 -- splint screw, 7 -- transverse stiffener, 8 -- test piece, 9 -- lead screw.

具体实施方式 Detailed ways

下面结合实施例和附图对本发明作进一步的说明。The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

图1为钢结构受压构件加载试验侧向约束装置实施例的结构俯视示意图,图2和图3分别为图1沿A-A方向的结构剖视图和沿B-B方向的结构剖视图。钢结构受压构件加载试验侧向约束装置为可拆卸结构,由丝杠卡1、支撑横梁2,自平衡横梁3、丝杠卡基座4、试件夹板5和夹板螺杆6构成。支撑横梁2和自平衡横梁3均为H型工字钢结构。支撑横梁2内侧翼缘中部有4个孔。前后2个支撑横梁2内侧翼缘相对并互相平行,左右2个自平衡横梁3内侧翼缘相对并分别与前后2个支撑横梁2的左端和右端螺栓连接构成矩形的自平衡反力架。4个夹板螺杆6垂直固接在试件夹板5背面的四角处,2块试件夹板5在2个支撑横梁2之间正面相对互相平行并分别用4个夹板螺杆6和每个夹板螺杆6的2个配套螺母通过支撑横梁2内侧翼缘中部的4个孔固定在2个支撑横梁2内侧翼缘中部,通过调节配套螺母调整2块试件夹板5的间距,试件夹板5的正面设置一层聚四氟乙烯板,以减小试件夹板5与试件8间的摩擦力。按自平衡反力架水平放置并左右对称置于长柱压力试验机的4个丝杠9之间的位置,每个支撑横梁2上,2个丝杠卡基座4分别在2个丝杠9的对应位置固接在支撑横梁2外侧翼缘上,丝杠卡1通过固定卡座103与丝杠卡基座4固接。Fig. 1 is a schematic top view of an embodiment of a lateral restraint device for a loading test of a steel structure compression member, and Fig. 2 and Fig. 3 are a structural sectional view along the A-A direction and a structural sectional view along the B-B direction of Fig. 1, respectively. The lateral restraint device of the steel structure compression member loading test is a detachable structure, which consists of a screw clamp 1, a supporting beam 2, a self-balancing beam 3, a screw clamp base 4, a specimen splint 5 and a splint screw 6. Both the support beam 2 and the self-balancing beam 3 are H-shaped steel structures. There are 4 holes in the middle part of the inner flange of the supporting beam 2. The inner flanges of the front and rear two supporting beams 2 are opposite and parallel to each other, and the inner flanges of the left and right self-balancing beams 3 are opposite and respectively connected with the left and right ends of the front and rear supporting beams 2 to form a rectangular self-balancing reaction frame. Four splint screws 6 are fixed vertically at the four corners of the back of the test piece splint 5, and the fronts of the two test piece splints 5 are relatively parallel to each other between the two support beams 2, and the four splint screw rods 6 and each splint screw rod 6 are used respectively. The two matching nuts are fixed to the middle of the inner flanges of the two supporting beams 2 through the four holes in the middle of the inner flanges of the supporting beams 2, and the distance between the two test piece splints 5 is adjusted by adjusting the matching nuts. The front side of the test piece splint 5 is set One layer of polytetrafluoroethylene plate is used to reduce the friction between the specimen splint 5 and the specimen 8. Place the self-balancing reaction frame horizontally and symmetrically between the four lead screws 9 of the long-column pressure testing machine. The corresponding position of 9 is affixed to the outer flange of the support beam 2, and the lead screw card 1 is affixed to the lead screw card base 4 through the fixed card seat 103.

为了提高支撑横梁2和自平衡横梁3的强度,支撑横梁2和自平衡横梁3的腹板两侧固接横向加劲肋7。支撑横梁2两端有封头盖板用于和自平衡横梁3螺栓连接。In order to improve the strength of the supporting beam 2 and the self-balancing beam 3 , transverse stiffeners 7 are affixed to both sides of the webs of the supporting beam 2 and the self-balancing beam 3 . The two ends of the support beam 2 are provided with cover plates for bolt connection with the self-balancing beam 3 .

如图4所示,丝杠卡1由活动卡101、固定卡102和固定卡座103组成,活动卡101和固定卡102分别为与长柱压力试验机的丝杠9直径相同的半圆环,固定卡102外侧和固定卡座103的圆弧面固接,固定卡座103的两侧面上焊接加劲肋,活动卡101和固定卡102为螺栓连接。As shown in Figure 4, the lead screw card 1 is composed of a movable card 101, a fixed card 102 and a fixed card seat 103, and the movable card 101 and the fixed card 102 are respectively semicircular rings with the same diameter as the lead screw 9 of the long column pressure testing machine. , the outer side of the fixed card 102 is affixed to the arc surface of the fixed card seat 103, the two sides of the fixed card seat 103 are welded with stiffeners, and the movable card 101 and the fixed card 102 are connected by bolts.

钢结构受压构件加载试验侧向约束装置用于受压钢柱试件的整体稳定性能试验研究的使用步骤为:The steps to use the lateral restraint device in the loading test of the steel structure compression member for the overall stability performance test of the compression steel column specimen are as follows:

首先将丝杠卡1按试件8的试验设计高度卡在长柱压力试验机的四根丝杠9上从而将支撑横梁2固定在长柱压力试验机的丝杠9上,支撑横梁2承担钢柱的侧向水平荷载;First, the lead screw clamp 1 is clamped on the four lead screws 9 of the long column pressure testing machine according to the test design height of the test piece 8, so that the support beam 2 is fixed on the lead screws 9 of the long column pressure test machine, and the support beam 2 bears Lateral horizontal loads on steel columns;

然后将2个自平衡横梁3与2个支撑横梁2通过螺栓装配成一整体,共同组成自平衡反力架,自平衡横梁3的作用为平衡支撑横梁2的反力,避免将荷载传递至长柱压力试验机的丝杠9;Then, the two self-balancing beams 3 and the two supporting beams 2 are assembled into a whole through bolts to form a self-balancing reaction frame. The function of the self-balancing beam 3 is to balance the reaction force of the supporting beam 2, so as to prevent the load from being transmitted to the long column Lead screw 9 of the pressure testing machine;

最后将试件夹板5通过四根夹板螺杆6和配套螺母装配到支撑横梁2内侧翼缘中部,并通过螺母调节试件夹板5位置直至与试件8侧面顶紧。Finally, the test piece splint 5 is assembled to the middle of the inner flange of the support beam 2 through four splint screws 6 and matching nuts, and the position of the test piece splint 5 is adjusted through the nuts until it is tightly pressed against the side of the test piece 8 .

整个装置的固定高度和2块试件夹板5的间距可调,适用于不同高度和截面尺寸的钢柱试件受压试验。The fixed height of the whole device and the adjustable distance between the two specimen splints 5 are applicable to the compression test of steel column specimens with different heights and cross-sectional sizes.

本发明针对现有长柱压力试验机无法对受压钢柱提供侧向支撑的问题,提出了一种新型的侧向支撑装置,在不需要大型支撑反力架的基础上,实现了受压钢柱试件失稳平面外的有效侧向支撑,且尺寸灵活可调,具有很强的实用性和经济性,能够满足试验研究工作的需要,适用于受压构件的整体稳定性能试验研究。Aiming at the problem that the existing long column pressure testing machine cannot provide lateral support for the steel column under pressure, the present invention proposes a new type of lateral support device, which realizes the compression on the basis of no need for a large supporting reaction force frame The effective lateral support outside the instability plane of the steel column specimen, and its size is flexible and adjustable, has strong practicability and economy, can meet the needs of experimental research work, and is suitable for the overall stability performance experimental research of compression members.

以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应该以权利要求的保护范围为准。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (5)

1. lateral restraining device for load test of steel-structure compression member, it is characterized in that, lateral restraining device for load test of steel-structure compression member is demountable structure, by leading screw card (1), supporting traverse (2), self-equilibrating crossbeam (3), leading screw card pedestal (4), specimen splint (5) and clamping plate screw rod (6) consist of, supporting traverse (2) and self-equilibrating crossbeam (3) are H type i-beam structure, there are 4 holes at middle part, the inboard edge of a wing of supporting traverse (2), the inboard edge of a wing of 2 supporting traverses (2), front and back is relatively also parallel to each other, the self-balancing reaction frame that 2 self-equilibrating crossbeams (3) inboard edge of a wing, left and right relatively and respectively connects and composes rectangle with left end and the right-hand member bolt of 2 supporting traverses in front and back (2), 4 clamping plate screw rods (6) vertically are fixed in the Si Jiaochu at specimen splint (5) back side, parallel to each other and 2 matching nuts using respectively 4 clamping plate screw rods (6) and each clamping plate screw rod (6) of 2 specimen splints (5) vis-a-vis between 2 supporting traverses (2) are fixed on middle part, the inboard edge of a wing of 2 supporting traverses (2) by 4 holes at middle part, the inboard edge of a wing of supporting traverse (2), adjust the spacing of 2 specimen splints (5) by regulating matching nut, self-balancing reaction frame horizontal positioned and left-right symmetric are placed in the position between 4 leading screws (9) of long column pressure testing machine, on each supporting traverse (2), 2 leading screw card pedestals (4) are fixed on supporting traverse (2) outer side wing edge at the correspondence position of 2 leading screws (9) respectively, leading screw card (1) is affixed by Fixing clamp-seat (103) and leading screw card pedestal (4).
2. a kind of lateral restraining device for load test of steel-structure compression member according to claim 1, it is characterized in that, in described supporting traverse (2), the affixed transverse stiffeners in web both sides (7), supporting traverse (2) two ends arrange the end socket cover plate and are used for being connected 3 with the self-equilibrating crossbeam) the bolt connection.
3. a kind of lateral restraining device for load test of steel-structure compression member according to claim 1, is characterized in that, in described self-equilibrating crossbeam (3), and the affixed transverse stiffeners in web both sides (7).
4. a kind of lateral restraining device for load test of steel-structure compression member according to claim 1, it is characterized in that, described leading screw card (1) is comprised of active card (101), fixed card (102) and Fixing clamp-seat (103), active card (101) is respectively the semicircular ring identical with leading screw (9) diameter of long column pressure testing machine with fixed card (102), the arc surface of fixed card (102) outside and Fixing clamp-seat (103) is affixed, weld ribbed stiffener on the two sides of Fixing clamp-seat (103), active card (101) is connected 102 with fixed card) be that bolt connects.
5. a kind of lateral restraining device for load test of steel-structure compression member according to claim 1, is characterized in that, the front of described specimen splint (5) arranges one deck polyfluortetraethylene plate, to reduce the friction force between specimen splint (5) and test specimen (8).
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