Replaceable concrete-filled steel tube encased ECC (engineered cementitious composite) combined anti-collision pile

Abstract

The invention provides a replaceable concrete-filled steel tube encased ECC (engineered cementitious composite) combined anti-collision pile which comprises a high-strength concrete column core, a steel tube and an outer ECC poured layer. The steel tube is filled with the high-strength concrete column core, and the outer ECC poured layer is adhered with the outer wall of the concrete tube. The replaceable concrete-filled steel tube encased ECC combined anti-collision pile has the advantages that the replaceable concrete-filled steel tube encased ECC combined anti-collision pile is provided with ECC mainly for dissipating energy, the ECC is provided with strain hardening and fine multi-crack cracking mechanisms, and accordingly the energy dissipation capacity of anti-collision structures can be effectively improved when impact of vehicles is borne by the anti-collision structures in accidents; concrete-filled steel tubes are arranged inside the replaceable concrete-filled steel tube encased ECC combined anti-collision pile, accordingly, the impact resistance and the ductility of the anti-collision structures can be improved to a great extent, and the anti-collision structures can beprevented from being easily broken under the impact of the vehicles; the replaceable concrete-filled steel tube encased ECC combined anti-collision pile is simple in structure, convenient to design,construct and replace and low in manufacturing cost and can be safe and economical.

Description

Technical field [0001] The invention belongs to the technical field of civil engineering design, and relates to a replaceable steel tube concrete outer ECC combined anti-collision pile. Background technique [0002] With the rapid development of urban construction, all kinds of expressways, urban traffic roads, highways around the city and township highways and other transportation networks extend in all directions, coupled with the rapid economic development, the total number of vehicles has soared, and road traffic safety problems have been greatly affected by the country and the general public. Public attention. Restricted by multiple comprehensive factors such as topography and natural disasters, some road sections have poor alignment and unopened vision. This has led to frequent car accidents on these road sections, which have caused the safety of the lives and property of the general public. A great threat. How to protect the life safety of the parties involved in a car a...

AI Technical Summary

Problems solved by technology

Only the Chinese patent "Steel-FRP composite pipe concrete anti-collision pier (public number: CN205742748U, publication date: November 30, 2016)" reported a combined anti-collision structure, but its internal and external structures were easily separated under impact. FRP undergoes brittle failure under impact, and its durability, self-repair, damage resistance and anti-collision effects need to be improved

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