CN103362063A - Base oscillating shock-isolation device for pile foundation bridge pier - Google Patents
Base oscillating shock-isolation device for pile foundation bridge pier Download PDFInfo
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- CN103362063A CN103362063A CN2012100873511A CN201210087351A CN103362063A CN 103362063 A CN103362063 A CN 103362063A CN 2012100873511 A CN2012100873511 A CN 2012100873511A CN 201210087351 A CN201210087351 A CN 201210087351A CN 103362063 A CN103362063 A CN 103362063A
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Abstract
The invention discloses a base oscillating shock-isolation device for a pile foundation bridge pier. The base oscillating shock-isolation device is characterized by consisting of an overturn-preventing steel strand or reinforcing bar, a pier body, a spread foundation, rubber, a separation face and a foundation. The pier body is connected with the spread foundation and is perpendicular to the same and embedded into the same; the four sides of the spread foundation are filled with the rubber; the overturn-preventing steel strand or reinforcing bar, with one end anchored to a pier top and the other end anchored to the foundation, is inserted into the pier body. According related design specifications, the pier body is separated from the foundation, earthquake energy to the bridge pier is filtered by means of oscillating during design earthquake or rare earthquake, so that application function requirements of the bridge pier under normal service load and frequent earthquake are guaranteed. As the pier body and the foundation are separated in the design earthquake or rare earthquake, both the bridge pier and the foundation can be protected against earthquake.
Description
Technical field
The invention belongs to engineering seismic isolation technology field, is that earthquake isolating equipment is waved in a kind of substrate of bridge piers with pile foundation specifically.Bridge pier will wave with respect to the basis under design earthquake or rarely occurred earthquake effect, and pier shaft self-resetting after earthquake finishes reaches the antidetonation target that can protect bridge pier can protect again the basis.
Background technology
Consider that violent earthquake occurs intermittent and uncertain, the elastic design of Reinforced Concrete Bridge is uneconomic.The bridge of tensility shock-resistant Theoretical Design, the earthquake later plastic hinge region of pier stud also will cause permanent permanent set.The damage that permanent set causes, slight person perhaps can repair, but the bearing capacity after repairing is difficult to prediction, and severe patient then need be rebuild, and is not only time-consuming but also make interruption of communication.Existing bearing subtracts, the deformability of earthquake isolating equipment is limited, and applicable frequency range is narrower, and strict service condition is arranged, and can not adapt to the moderate finite deformation on basis, weak soil place.The possibility that resonates with the place is arranged behind the isolation bridge on the weak soil place, thereby bridge can not be applicable to the weak soil place.
Summary of the invention
Earthquake isolating equipment is waved in the substrate that the invention provides a kind of bridge piers with pile foundation, this device is not when affecting the bridge normal usage function, improve the anti-seismic performance of bridge pier structure, avoid bridge pier under severe earthquake action, to produce major injury, thereby provide reliable technical guarantee for the destruction of resisting earthquake.
The object of the present invention is achieved like this:
Earthquake isolating equipment is waved in a kind of substrate of bridge piers with pile foundation, is to be made of overturn-preventing steel strand or reinforcing bar, pier shaft, expansion basis, rubber, parting surface and basis.Pier shaft is connected with the expansion basis, and pier shaft is basic perpendicular to enlarging, and embeds in the basis, uses rubber filling around the expansion basis, and in overturn-preventing steel strand or the reinforcing bar implantation pier shaft, an end is anchored in Dun Ding, and the other end is anchored in the basis.
Arrive theoretical as follows involved in the present invention:
The bridge pier earthquake motion equation in adhesion stage is as follows:
In the formula,
Be mass matrix, see formula (2);
Be damping matrix, be expressed as with Rayleigh damping
If the stabilizing moment that gravity provides in earthquake bridge pier when lifting from moment of flexure enters the stage of waving, the system equation of motion in this stage is as follows:
In the formula,
I bFor the dynamic moment of inertia sum of all particles to substrate, see formula (7);
M t Be all quality sums, see formula (8);
M (t)The overturning or slip resistance analysis moment of flexure that provides for the basis;
R (t)The vertical counter-force that provides for the basis.
Compare with finite element and the boundary element model of complexity, the Winkler spring model is the interactional a kind of short-cut method of simulation soil-structure.The present invention's spring beam unit simulation pier stud, bridge floor is simulated with lumped mass, and mass of foundation is piled up in the center of gravity on basis, and simulate with firm arm on the basis, and the Winkler spring model waves in order to analog basis shock insulation bridge pier, sees Fig. 3.The power displacement relation of the Winkler basis spring of pressurized is shown in Fig. 4.Adopt the method for FEMA356 suggestion to calculate the Winkler spring rate, see Fig. 5-6 and formula (9), formula (10).
（10）
In Fig. 5 and the formula,
Spring rate for every square metre of basic end;
GModulus of shearing for basic material;
The beneficial effect of advantage of the present invention and generation is:
1, shake rear abutment and basis can reach basic not damaged, and integrality is better, and can carry out Self-resetting by pier shaft deadweight and top dead load gravity; Wave shock insulation less to the design change of existing conventional bridge pier, easily realize, applied widely.
2, can be owing to seismic design increases more investment before the shake; Slight damage does not occur or occurs in the shake rear abutment, can repair or slightly repair and just can use, and has avoided rehabilitation expense after the expensive shake, has reduced repair amount and financial cost after shaking, has guaranteed to have a good transport and communication network.Win the valuable time for shaking rear earthquake relief work and post-disaster reconstruction, had very large social synthesis's benefit.
3, design makes pier shaft separate with the basis according to related specifications in the present invention; and in design earthquake or rarely occurred earthquake bridge pier by waving the filtration seismic energy; guarantee the use functional requirement of bridge pier under normal service load and frequently occurred earthquake with this; and pier shaft is separated with the basis, reach the antidetonation target that can protect bridge pier can protect again the basis.
Description of drawings
Fig. 1 is the present invention's stage schematic diagram of adhering.
Fig. 2 is that Fig. 1 waves the stage schematic diagram.
Fig. 3 is that analytical model I is waved on the basis.
Fig. 4 is basic spring model.
Fig. 5 is Winkler distribution rigidity model.
Fig. 6 is Winkler distribution spring model.
The specific embodiment
As shown in Figure 1, earthquake isolating equipment is waved in a kind of substrate of bridge piers with pile foundation, comprises overturn-preventing steel strand 1, pier shaft 2, expansion basis 3, rubber 4, parting surface 5 and basis 6.Pier shaft 2 with enlarge basis 3 and be connected, and pier shaft 2 is perpendicular to enlarging basis 3, and embeds in the basis 6, enlarge basis 3 around fill with rubber 4, overturn-preventing steel strand 1 are implanted in the pier shaft 2, end anchoring and a Dun Ding, the other end are anchored in basic 6.
Normal use and the frequently occurred earthquake effect under, pier shaft 2 does not wave, and has guaranteed the safety of the stable and driving of the overturning or slip resistance analysis of bridge construction.
In design earthquake or rarely occurred earthquake, bridge pier will wave with respect to the basis, and by waving the filtration seismic energy, steel strand 1 can prevent that pier shaft from toppling.
Earthquake finishes the rear abutment self-resetting, reaches the antidetonation target that can protect bridge pier can protect again the basis with this in earthquake.
Claims (1)
1. earthquake isolating equipment is waved in the substrate of a bridge piers with pile foundation, be by overturn-preventing steel strand or reinforcing bar (1), pier shaft (2), enlarge basis (3), rubber (4), parting surface (5) and basis (6) formation, it is characterized in that pier shaft (2) is connected with expansion basis (3), and pier shaft (2) is perpendicular to enlarging basis (3), and embed in the basis (6), enlarge filling with rubber (4) of basis (3) all around, overturn-preventing steel strand or reinforcing bar (1) are implanted in the pier shaft (2), one end is anchored in Dun Ding, and the other end is anchored in the basis (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100873511A CN103362063A (en) | 2012-03-29 | 2012-03-29 | Base oscillating shock-isolation device for pile foundation bridge pier |
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| CN2012100873511A CN103362063A (en) | 2012-03-29 | 2012-03-29 | Base oscillating shock-isolation device for pile foundation bridge pier |
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| CN2012100873511A Pending CN103362063A (en) | 2012-03-29 | 2012-03-29 | Base oscillating shock-isolation device for pile foundation bridge pier |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103526691A (en) * | 2013-10-31 | 2014-01-22 | 中铁二院工程集团有限责任公司 | Basic shock insulation structure for pier |
| CN103643627A (en) * | 2013-12-20 | 2014-03-19 | 中铁二院工程集团有限责任公司 | Damping structure for continuous rigid frame pier with limited constraint |
| CN103866687A (en) * | 2014-03-19 | 2014-06-18 | 北京工业大学 | Energy-dissipation self-resetting bridge pier column structure |
| CN105604080A (en) * | 2015-12-08 | 2016-05-25 | 中铁二院工程集团有限责任公司 | Spread foundation structure shaped like Chinese character 'pin' |
| CN105735111A (en) * | 2016-04-03 | 2016-07-06 | 北京工业大学 | Self-centering swing shock insulation design method for ellipsoidal surface of pier bottom of bridge |
| CN106223359A (en) * | 2016-09-28 | 2016-12-14 | 湖南软件职业学院 | A kind of wind power foundation damping energy-dissipating device and construction technique thereof |
| CN109056782A (en) * | 2018-10-19 | 2018-12-21 | 吴修玲 | It is a kind of to wave damping device with what anchor bolt type basis connected applied to Latticed Towers pedestal |
| CN110565537A (en) * | 2019-09-23 | 2019-12-13 | 中铁第四勘察设计院集团有限公司 | Swivel bridge with shock insulation function and construction method thereof |
| CN111041978A (en) * | 2019-12-11 | 2020-04-21 | 郑州第二市政建设集团有限公司 | Anti-seismic pier column structure |
| CN113392450A (en) * | 2021-06-07 | 2021-09-14 | 国能朔黄铁路发展有限责任公司 | Method, device and system for evaluating health state of railway pier |
| CN116289510A (en) * | 2023-03-23 | 2023-06-23 | 天津大学 | Full-assembled double-column bridge structural system based on bearing platform and pier top swing |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103526691A (en) * | 2013-10-31 | 2014-01-22 | 中铁二院工程集团有限责任公司 | Basic shock insulation structure for pier |
| CN103643627A (en) * | 2013-12-20 | 2014-03-19 | 中铁二院工程集团有限责任公司 | Damping structure for continuous rigid frame pier with limited constraint |
| CN103866687A (en) * | 2014-03-19 | 2014-06-18 | 北京工业大学 | Energy-dissipation self-resetting bridge pier column structure |
| CN105604080A (en) * | 2015-12-08 | 2016-05-25 | 中铁二院工程集团有限责任公司 | Spread foundation structure shaped like Chinese character 'pin' |
| CN105735111B (en) * | 2016-04-03 | 2017-06-20 | 北京工业大学 | Bridge pier bottom ellipsoid self-resetting swinging shock design method |
| CN105735111A (en) * | 2016-04-03 | 2016-07-06 | 北京工业大学 | Self-centering swing shock insulation design method for ellipsoidal surface of pier bottom of bridge |
| CN106223359A (en) * | 2016-09-28 | 2016-12-14 | 湖南软件职业学院 | A kind of wind power foundation damping energy-dissipating device and construction technique thereof |
| CN106223359B (en) * | 2016-09-28 | 2018-08-10 | 湖南软件职业学院 | A kind of wind power foundation damping energy-dissipating device and its construction technique |
| CN109056782A (en) * | 2018-10-19 | 2018-12-21 | 吴修玲 | It is a kind of to wave damping device with what anchor bolt type basis connected applied to Latticed Towers pedestal |
| CN110565537A (en) * | 2019-09-23 | 2019-12-13 | 中铁第四勘察设计院集团有限公司 | Swivel bridge with shock insulation function and construction method thereof |
| CN111041978A (en) * | 2019-12-11 | 2020-04-21 | 郑州第二市政建设集团有限公司 | Anti-seismic pier column structure |
| CN111041978B (en) * | 2019-12-11 | 2021-03-30 | 郑州第二市政建设集团有限公司 | Anti-seismic pier column structure |
| CN113392450A (en) * | 2021-06-07 | 2021-09-14 | 国能朔黄铁路发展有限责任公司 | Method, device and system for evaluating health state of railway pier |
| CN116289510A (en) * | 2023-03-23 | 2023-06-23 | 天津大学 | Full-assembled double-column bridge structural system based on bearing platform and pier top swing |
| CN116289510B (en) * | 2023-03-23 | 2023-11-14 | 天津大学 | Full-assembled double-column bridge structural system based on bearing platform and pier top swing |
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Application publication date: 20131023 |